Researcher basic information

• Ph,D, (Sci.), The University of Tokyo
• Ms. (Sci.), The University of Tokyo

• https://researchmap.jp/read0067000ym?lang=en

• https://jglobal.jst.go.jp/detail?JGLOBAL_ID=200901021478117952

• 60376655

• 200901021478117952

• Biogeochemistry
• Marine atmospheric chemistry
• Atmospheric chemistry
• Interaction between atmosphere and biosphere
• Organic aerosol

• Natural Science, Atmospheric and hydrospheric sciences
• Environmental Science/Agriculture Science, Environmental dynamic analysis

• Master's degree program, Graduate School of Environmental Science
• Doctoral (PhD) degree program, Graduate School of Environmental Science

Research activity information

• 2017, 日本地球惑星科学連合 (JpGU), 第2回地球惑星科学振興西田賞
  「大気有機エアロゾルの起源に関する観測的研究」
  宮﨑 雄三
• 2016, 日本気象学会, 2016年度 正野賞
  宮﨑 雄三
• 2011, 日本大気化学会 第7回（2011年度）奨励賞
  Japan
• 2009, 日本気象学会 2009年度 山本・正野論文賞
  Japan

• Pathway selection in cement hydrate assembly via transient calcium coordination by triethanolamine
  Qi Zhai; Tomoya Yamazaki; Hegoi Manzano; Hendrik Heinz; Yuki Kimura; Jiesul Park; Muhammad Haseeb Zaheer; Namkon Lee; Yuzo Miyazaki; In-Hee Hwang; Kiyofumi Kurumisawa; Juhyuk Moon
  Cement and Concrete Research, 207, 108293, 108293, Elsevier BV, Sep. 2026, [Peer-reviewed]
  English, Scientific journal
• Molecular insights into forest aerosols: diacids, oxoacids, and fatty acids over a year in Hokkaido
  Bhagawati Kunwar; Kimitaka Kawamura; Kei Nosaka; Yuzo Miyazaki; Petr Vodička; Md. Mozammel Haque; Ambarish Pokhrel
  ACS Earth and Space Chemistry, American Chemical Society (ACS), May 2026
  English, Scientific journal
• Conifer leaf wax acts as a source of secondary fatty alcohols in atmospheric aerosols
  Yuhao Cui; Eri Tachibana; Yuzo Miyazaki
  Biogeosciences, 23, 8, 2927, 2938, Copernicus GmbH, 30 Apr. 2026, [Peer-reviewed], [Last author, Corresponding author]
  English, Scientific journal, Abstract. Fatty alcohols (FAs) are major components of plant leaf surface lipids emitted into the atmosphere as primary biological aerosol particles (PBAPs). FAs in the atmosphere can act as ice-nucleating particles to form clouds that affect climate through radiative forcing and precipitation processes. Secondary FAs (SFAs) in plant waxes can act as tracers for PBAPs. However, the specific plant species that contribute to the atmospheric emissions of SFAs, as well as the factors controlling the SFA amount of atmospheric SFA emissions, remain poorly understood. In this study, we collected size-segregated aerosols and leaf samples from various plant species at a cool-temperate forest site in Hokkaido, northern Japan, mainly in spring and autumn. n-nonacosan-10-ol was the most abundant SFA in the aerosols, which resided mostly in the supermicrometer size range, with the maximum concentration observed in spring. Among all plant leaves examined, n-nonacosan-10-ol was identified only in coniferous leaf samples. Despite the limited data, the mass of n-nonacosan-10-ol per leaf exhibited a seasonal difference similar to that of the aerosol SFA concentrations between spring and autumn. Our results suggested that the amount of n-nonacosan-10-ol in aerosols was primarily controlled by the number of n-nonacosan-10-ol coniferous trees, which was determined by the phenology. Overall, our findings suggest n-nonacosan-10-ol can be used as a tracer compound for PBAPs originating from conifer leaf wax, which can be used to estimate the atmospheric emission flux of PBAPs on a global scale.
• Factors controlling the concentration of water-soluble pyrogenic carbon in aerosols in Hokkaido, Japan
  Riku Miyase; Yuzo Miyazaki; Tomohisa Irino; Youhei Yamashita
  Atmospheric Chemistry and Physics, 26, 3, 2141, 2159, Copernicus GmbH, 10 Feb. 2026, [Peer-reviewed]
  English, Scientific journal, Abstract. Pyrogenic carbon (PyC) is a continuum of compounds generated during the incomplete combustion of biomass or fossil fuels. Water-soluble PyC (WSPyC), a PyC smaller than 0.7 µm, is transported to the ocean via rivers or atmospheric deposition and is considered a key component in the long-term regulation of the global carbon cycle. Compared to the riverine input flux, the atmospheric deposition flux of WSPyC may have large uncertainties due to limited observations. This study examines the factors influencing WSPyC concentration in atmospheric aerosols in Sapporo, Hokkaido, based on a year-round observation. The WSPyC concentration in the aerosols, determined with the benzene polycarboxylic acid method, ranged from 1.41 to 46.5 ng C m−3, with an average value of 13.7±10.6 ng C m−3. The average concentration was lower than previously observed near combustion sources. Positive Matrix Factorization (PMF) analysis revealed that 60 % of the WSPyC concentration was attributed to a K+-dominated combustion, which included the burning of biomass and biofuels. Meanwhile, 40 % of WSPyC was associated with factors related to the atmospheric aging of aerosols derived from fossil fuel combustion. The global WSPyC deposition flux to the ocean has previously been estimated based on the concentration ratio of WSPyC to elemental carbon (EC) or water-soluble organic carbon (WSOC). The results of this study suggested that these ratios vary due to the atmospheric aging processes, including photochemical production of WSPyC from soot, indicating the need for a reassessment of the global WSPyC deposition flux.
• Formation of marine atmospheric organic aerosols associated with the spring phytoplankton bloom after sea ice retreat in the Sea of Okhotsk
  Yuzo Miyazaki; Yunhan Wang; Eri Tachibana; Koji Suzuki; Youhei Yamashita; Jun Nishioka
  Atmospheric Chemistry and Physics, 25, 24, 18325, 18340, Copernicus GmbH, 15 Dec. 2025, [Peer-reviewed], [Lead author, Corresponding author]
  English, Scientific journal, Abstract. The Sea of Okhotsk is one of the most biologically productive regions, where primary production during spring phytoplankton blooms after sea ice melting/retreat has the potential to contribute to the sea-to-air emission flux of atmospheric organic aerosols (OAs). To elucidate the effect of oceanic biological activity during blooms on the formation process of OAs, aerosol samples and surface seawater were collected during the bloom period of April 2021. Organic matter (OM) was the dominant component of submicrometer aerosols during both the bloom (53 ± 16 %) and bloom-decay periods (44 ± 12 %), with OM being highly water-soluble during the bloom. Stable carbon isotope ratios of aerosol organic carbon (OC) showed that 73 %–82 % of the observed aerosols were of marine origin. Relations between water-soluble OC (WSOC) and molecular tracers suggested that aerosol WSOC of marine origin was likely affected by secondary formation from precursors such as α-pinene and DMS-relevant compounds rather than primary emissions of sea spray aerosols. The amounts of water-soluble organic nitrogen (WSON) in aerosol and dissolved organic nitrogen (DON) in seawater during the bloom were larger than those during bloom-decay period, suggesting the preferential formation of N-containing water-soluble OAs of marine origin during the bloom. The increase in the amount of DON during the bloom was likely associated with the predominant diatoms, Thalassiosira spp. and Fragilariopsis spp. This study highlights the significant contribution of the secondary formation of marine biogenic OAs with increased N-containing components during the bloom after sea ice melting/retreat in the subarctic ocean.
• Integrated aircraft and research vessel observational studies of aerosols and clouds in summer over the western North Pacific
  Makoto Koike; Yoshimi Kawai; Kouji Adachi; Hidenori Aiki; Yugo Kanaya; Hideaki Kawai; Kazuyuki Kita; Fumiyoshi Kondo; Tsuyoshi Koshiro; Hitoshi Matsui; Takuma Miyakawa; Ayumu Miyamoto; Takafumi Miyasaka; Yuzo Miyazaki; Michihiro Mochida; Tatsuhiro Mori; Nobuhiro Moteki; Toshiyuki Murayama; Hisashi Nakamura; Sho Ohata; Eitarou Oka; Satoru Okajima; Yutaka Tobo; Shion Sekizawa; Atsushi Yoshida
  Progress in Earth and Planetary Science, 12, 1, Springer Science and Business Media LLC, 07 Jul. 2025, [Peer-reviewed]
  English, Scientific journal, Abstract
  
  An integrated observational study of aerosols and clouds was carried out in summer 2022 over the western North Pacific (off the eastern coast of Hokkaido, Japan) using both an aircraft and a research vessel for the first time in this area. The aim of this experiment was to characterize the physical and chemical properties of aerosols and to evaluate the contributions of anthropogenic and natural emissions to cloud condensation nuclei (CCN) and ice-nucleating particle (INP) concentrations. The experiment also aims to examine the vertical structure of low-level clouds, which have high radiative effects, over this region. Here, we present an overview of the experiment and some preliminary results. Onboard the research vessel, suspended particulate matter in seawater was sampled, and the size distributions of dominant particle types (e.g., diatom fragments and organic matter) were determined. By analyzing atmospheric aerosols sampled from aircraft, we derived the number size distributions of dust-like particles in the air far from source regions. The aerosol size distributions, as measured from both the vessel and aircraft, suggested that most of the aerosols that could act as CCN were of anthropogenic origin: The upper-bound estimate of the sea spray aerosol (SSA) contribution to the CCN concentration at altitudes below 1200 m was 23%. Numerical model simulations generally reproduced the observed aerosol number concentrations. The simulations supported the inference from the observation that most CCN over the study area were of anthropogenic origin. Using this model, SSA emissions were estimated to account for 9% of the cloud radiative effect. Cloud observations from aircraft revealed that low-level clouds tended to have an adiabatic vertical structure under cold air advection, whereas under warm air advection, they occasionally had a layered structure. Such diverse vertical structures of low-level clouds are not generally seen in the subtropics. The integrated observations carried out in this study provided a basic picture of aerosols and clouds over the study area in summer. Further research is needed to elucidate the roles of aerosols in cloud formation and the radiation budget under various meteorological conditions within the framework of atmosphere–ocean interactions.
• Emissions of Atmospheric Reactive Nitrogen from the Ocean Surface in the Framework of Biogeochemistry
  Yuzo Miyazaki
  Chikyukagaku（Geochemistry）, 58, 4, 125, 134, Dec. 2024, [Peer-reviewed], [Invited], [Lead author, Corresponding author]
  Japanese, Scientific journal
• Origin of secondary fatty alcohols in atmospheric aerosols in a cool–temperate forest based on their mass size distributions
  Yuhao Cui; Eri Tachibana; Kimitaka Kawamura; Yuzo Miyazaki
  Biogeosciences, 20, 24, 4969, 4980, Copernicus GmbH, Dec. 2023, [Peer-reviewed], [Corresponding author]
  Scientific journal, Abstract. Fatty alcohols (FAs) are major components of surface lipids in plant leaves and serve as surface-active organic aerosols (OAs), which can act as primary biological aerosol particles (PBAPs). To elucidate the origin and formation of secondary fatty alcohols (SFAs) in atmospheric aerosols, their mass size distribution in aerosol samples obtained from a deciduous forest canopy was measured in spring, summer and autumn. The SFAs showed the highest concentration in spring (growing season), with n-nonacosan-10-ol being the most abundant. In spring and summer, the size peak of n-nonacosan-10-ol was in the particle size range >10.0 µm, whereas it was in the 1.9–3.0 µm range in autumn. The size distribution of n-nonacosan-10-ol did not show any significant correlation with that of the known biogenic tracers of pollen, soil and fungal spores in spring and summer. The overall results, together with SFAs measured in plant leaves, as well as the literature, suggest that SFAs originate mostly from plant waxes and that leaf senescence status is likely an important factor controlling the size distribution of SFAs. This study provides new insights into the possible sources of PBAPs and their effects on the ice nucleation activity of aerosols based on seasonal changes in particle size.
• Observed in-plume gaseous elemental mercury depletion suggests significant mercury scavenging by volcanic aerosols
  Alkuin M. Koenig; Olivier Magand; Clemence Rose; Andrea Di Muro; Yuzo Miyazaki; Aurelie Colomb; Matti Rissanen; Christopher F. Lee; Theodore K. Koenig; Rainer Volkamer; Jerome Brioude; Bert Verreyken; Tjarda Roberts; Brock A. Edwards; Karine Sellegri; Santiago Arellano; Philippe Kowalski; Alessandro Aiuppa; Jeroen E. Sonke; Aurélien Dommergue
  Environmental Science: Atmospheres, 3, 10, 1418, 1438, Royal Society of Chemistry (RSC), Aug. 2023, [Peer-reviewed]
  English, Scientific journal, We observed complete GEM depletion in a volcanic plume.
• In Situ Surface Tension Measurement of Deliquesced Aerosol Particles
  Masao Gen; Akihide Hibara; Phuong Nguyet Phung; Yuzo Miyazaki; Michihiro Mochida
  The Journal of Physical Chemistry A, 127, 29, 6100, 6108, American Chemical Society (ACS), 18 Jul. 2023, [Peer-reviewed]
  Scientific journal
• Marine aerosol feedback on biogeochemical cycles and the climate in the Anthropocene: lessons learned from the Pacific Ocean
  Akinori Ito; Yuzo Miyazaki; Fumikazu Taketani; Yoko Iwamoto; Yugo Kanaya
  Environmental Science: Atmospheres, 3, 782, 798, Royal Society of Chemistry (RSC), Apr. 2023, [Peer-reviewed]
  English, Scientific journal, Marine aerosol feedback on biogeochemical cycles and the climate remains highly uncertain due to the complex interplay. This review highlights recent advances in our understanding of organic aerosols, nitrogen, and iron as well as cloud properties over the Pacific Ocean.
• Measurement report: Summertime fluorescence characteristics of atmospheric water-soluble organic carbon in the marine boundary layer of the western Arctic Ocean
  Jinyoung Jung; Yuzo Miyazaki; Jin Hur; Yun Kyung Lee; Mi Hae Jeon; Youngju Lee; Kyoung-Ho Cho; Hyun Young Chung; Kitae Kim; Jung-Ok Choi; Catherine Lalande; Joo-Hong Kim; Taejin Choi; Young Jun Yoon; Eun Jin Yang; Sung-Ho Kang
  Atmospheric Chemistry and Physics, 23, 8, 4663, 4684, Copernicus GmbH, Apr. 2023, [Peer-reviewed]
  English, Scientific journal, Abstract. Accelerated warming and a decline in sea ice coverage inthe summertime Arctic Ocean can significantly affect the emissions of marineorganic aerosols and biogenic volatile organic compounds. However, how thesechanges affect the characteristics of atmospheric water-soluble organiccarbon (WSOC), which plays an important role in the climate system, remainsunclear. Thus, to improve our understanding of WSOC characteristics in therapidly changing Arctic Ocean, including its summertime fluorescencecharacteristics, we simultaneously measured atmospheric concentrations ofionic species and WSOC, a fluorescence excitation–emission matrix coupledwith parallel factor (EEM-PARAFAC) analysis of WSOC, and marine biologicalparameters in surface seawaters of the western Arctic Ocean during thesummer of 2016. WSOC was predominantly present as fine-mode aerosols(diameter <2.5 µm, median =92 %), with the meanconcentration being higher in the coastal water areas(462±130 ngC m−3) than in the sea-ice-covered areas (242±88.4 ngC m−3).Moreover, the WSOC in the fine-mode aerosols was positively correlated withthe methanesulfonic acid in the fine-mode aerosol samples collected over thesea-ice-covered areas (r=0.88, p<0.01, n=10), suggestinghigh rates of sea–air gas exchange and emissions of aerosol precursor gasesdue to sea ice retreat and increasingly available solar radiation during theArctic summer. Two fluorescent components, humic-like C1 and protein-likeC2, were identified by the PARAFAC modeling of fine-mode atmospheric WSOC.The two components varied regionally between coastal and sea-ice-coveredareas, with low and high fluorescence intensities observed over the coastalareas and the sea-ice-covered areas, respectively. Further, the humificationindex of WSOC was correlated with the fluorescence intensity ratio of thehumic-like C1 / protein-like C2 (r=0.89, p<0.01) and the WSOCconcentration in the fine-mode aerosols (r=0.66, p<0.05), withthe highest values observed in the coastal areas. Additionally, the WSOCconcentration in the fine-mode aerosols was positively correlated with thefluorescence intensity ratio of the humic-like C1 / protein-like C2 (r =0.77, p<0.01) but was negatively correlated with the biologicalindex (r=-0.69, p<0.01). Overall, these results suggestedthat the WSOC in the fine-mode aerosols in the coastal areas showed a higherdegree of polycondensation and higher aromaticity compared to that in thesea-ice-covered areas, where WSOC in the fine-mode aerosols was associatedwith relatively new, less oxygenated, and biologically derived secondaryorganic components. These findings can improve our understanding of thechemical and biological linkages of WSOC at the ocean–sea-ice–atmosphereinterface.
• Fluorescence of solvent-extractable organics in sub-micrometer forest aerosols in Hokkaido, Japan
  Sonia Afsana; Ruichen Zhou; Yuzo Miyazaki; Eri Tachibana; Dhananjay Kumar Deshmukh; Kimitaka Kawamura; Michihiro Mochida
  Atmospheric Environment, 303, 119710, 119710, Elsevier BV, Mar. 2023, [Peer-reviewed]
  English, Scientific journal
• Marine nitrogen fixation as a possible source of atmospheric water-soluble organic nitrogen aerosols in the subtropical North Pacific
  Tsukasa Dobashi; Yuzo Miyazaki; Eri Tachibana; Kazutaka Takahashi; Sachiko Horii; Fuminori Hashihama; Saori Yasui-Tamura; Yoko Iwamoto; Shu-Kuan Wong; Koji Hamasaki
  Biogeosciences, 20, 2, 439, 449, Jan. 2023, [Corresponding author]
  English, Scientific journal
• Number‐Size Distribution and CCN Activity of Atmospheric Aerosols in the Western North Pacific During Spring Pre‐Bloom Period: Influences of Terrestrial and Marine Sources
  Kaori Kawana; Yuzo Miyazaki; Yuko Omori; Hiroshi Tanimoto; Sara Kagami; Koji Suzuki; Youhei Yamashita; Jun Nishioka; Yange Deng; Hikari Yai; Michihiro Mochida
  Journal of Geophysical Research: Atmospheres, 127, 19, American Geophysical Union (AGU), 16 Oct. 2022, [Peer-reviewed]
  English, Scientific journal
• Abundance, chemical structure, and light absorption properties of humic-like substances (HULIS) and other organic fractions of forest aerosols in Hokkaido
  Sonia Afsana; Ruichen Zhou; Yuzo Miyazaki; Eri Tachibana; Dhananjay Kumar Deshmukh; Kimitaka Kawamura; Michihiro Mochida
  Scientific Reports, 12, 1, Springer Science and Business Media LLC, 23 Aug. 2022
  Scientific journal, Abstract
  
  Atmospheric organic aerosol (OA) are considered as a significant contributor to the light absorption of OA, but its relationship with abundance, composition and sources are not understood well. In this study, the abundance, chemical structural characteristics, and light absorption property of HULIS and other low-to-high polar organics in PM_0.95 collected in Tomakomai Experimental Forest (TOEF) were investigated with consideration of their possible sources. HULIS were the most abundant (51%), and correlation analysis revealed that biogenic secondary organic aerosols significantly contribute to HULIS. The mass spectra obtained using a high-resolution aerosol mass spectrometer (HR-AMS) showed that HULIS and highly polar water-soluble organic matter (HP-WSOM) were substantially oxygenated organic aerosol fractions, whereas water-insoluble organic matter (WISOM) had a low O/C ratio and more hydrocarbon-like structures. The WISOM fraction was the predominant light-absorbing organics. HULIS and WISOM showed a noticeable seasonal change in mass absorption efficiency (MAE₃₆₅), which was highest in winter. Further, HULIS were shown to be less absorbing than those reported for urban sites. The findings in this study provide insights into the contribution of biogenic secondary OA on aerosol property and radiative forcing under varying contributions from other types of OA.
• Offline analysis of the chemical composition and hygroscopicity of sub-micrometer aerosol at an Asian outflow receptor site and comparison with online measurements
  Yange Deng; Hiroaki Fujinari; Hikari Yai; Kojiro Shimada; Yuzo Miyazaki; Eri Tachibana; Dhananjay Deshmukh; Kimitaka Kawamura; Tomoki Nakayama; Shiori Tatsuta; Mingfu Cai; Hanbing Xu; Fei Li; Haobo Tan; Sho Ohata; Yutaka Kondo; Akinori Takami; Shiro Hatakeyama; Michihiro Mochida
  Atmospheric Chemistry and Physics, Copernicus GmbH, 02 May 2022
  Scientific journal, Abstract. Filter-based offline analysis of atmospheric aerosol hygroscopicity coupled to composition analysis provides information complementary to that obtained from online analysis. However, its application itself and comparison to online analysis have remained limited to date. In this study, daily submicrometer aerosol particles (PM0.95, 50 % cutoff diameter: 0.95 μm) were collected onto quartz fiber filters in Okinawa Island, a receptor of East Asian outflow, in the autumn of 2015. The chemical composition of water-soluble matter (WSM) in PM0.95 and PM0.95 itself, and their respective hygroscopicities were characterized through the offline use of an aerosol mass spectrometer and a hygroscopicity tandem differential mobility analyzer. Thereafter, results were compared with those obtained from online analyses. Sulfate dominated the WSM mass (60 %), followed by water-soluble organic matter (WSOM, 20 %) and ammonium (13 %). WSOM accounted for most (93 %) of the mass of extracted organic matter (EOM) and the atomic O to C ratios (O : C) of WSOM and EOM were high (mean ± standard deviation were, respectively, 0.84 ± 0.08 and 0.79 ± 0.08), both of which indicate highly aged characteristics of the observed aerosol. The hygroscopic growth curves showed clear hysteresis for most samples. At 85 % RH, the calculated hygroscopicity parameter κ of the WSM (κWSM), WSOM, EOM, and PM0.95 (κPM0.95) were, respectively, 0.50 ± 0.03, 0.22 ± 0.12, 0.20 ± 0.11, and 0.47 ± 0.03. An analysis using the thermodynamic E-AIM model shows, on average, that inorganic salts and WSOM respectively contributed 88 % and 12 % of the κWSM (or κPM0.95). High similarities were found between offline and online analysis for chemical compositions that are related to particle hygroscopicity (the mass fractions and O : C of organics, and the degree of neutralization), and also for aerosol hygroscopicity. As possible factors governing the variation of κWSM, the influences of WSOM abundance and the neutralization of inorganic salts were assessed. At high RH (70–90 %), the hygroscopicity of WSM and PM0.95 was affected considerably by the presence of organic components; at low RH (20–50 %), the degree of neutralization could be important. This study not only characterized aerosol hygroscopicity at the receptor site of East Asian outflow, but also shows that the offline hygroscopicity analysis is an appropriate method, at least for aerosols of the studied type. The results encourage further applications to other environments and to more in-depth hygroscopicity analysis, in particular for organic fractions.
• Light absorption of forest organic aerosol fractions with different polarity
  Sonia Afsana; Ruichen Zhou; Yuzo Miyazaki; Eri Tachibana; Dhananjay Kumar Deshmukh; Kimitaka Kawamura; Michihiro Mochida
  Copernicus {GmbH}, 28 Mar. 2022
  Scientific journal
• Origin of water-soluble organic aerosols at the Maïdo high-altitude observatory, Réunion Island in the tropical Indian Ocean
  Simu, S. A; Y. Miyazaki; E. Tachibana; H. Finkenzeller; J. Brioude; A. Colomb; O. Magand; B. Verreyken; S. Evan; R. Volkamer; T. Stavrakou
  Atmos. Chem. Phys., 21, 17017, 17029, Nov. 2021, [Peer-reviewed], [Corresponding author]
  English, Scientific journal
• Seasonal and temporal variations of ambient aerosols in a deciduous broadleaf forest from northern Japan: Contributions of biomass burning and biological particles
  Md Mozammel Haque; Santosh Kumar Verma; Dhananjay K. Deshmukh; Bhagawati Kunwar; Yuzo Miyazaki; Kimitaka Kawamura
  Chemosphere, 279, Sep. 2021
  Scientific journal
• Author Correction: New index of organic mass enrichment in sea spray aerosols linked with senescent status in marine phytoplankton (Scientific Reports, (2020), 10, 1, (17042), 10.1038/s41598-020-73718-5)
  Miyazaki, Y.; Suzuki, K.; Tachibana, E.; Yamashita, Y.; M{\"u}ller, A.; Kawana, K.; Nishioka, J.
  Scientific Reports, 11, 1, 2021
  Scientific journal
• New index of organic mass enrichment in sea spray aerosols linked with senescent status in marine phytoplankton
  Yuzo Miyazaki; Koji Suzuki; Eri Tachibana; Youhei Yamashita; Astrid Mueller; Kaori Kawana; Jun Nishioka
  SCIENTIFIC REPORTS, 10, 1, Oct. 2020, [Lead author, Corresponding author]
  English, Scientific journal
• Impact of biogenic emissions of organic matter from a cool-temperate forest on aerosol optical properties
  Astrid Muller; Kazuma Aoki; Eri Tachibana; Tsutom Hiura; Yuzo Miyazaki
  ATMOSPHERIC ENVIRONMENT, 229, May 2020, [Peer-reviewed], [Corresponding author]
  English, Scientific journal
• Aerosol Liquid Water Promotes the Formation of Water-Soluble Organic Nitrogen in Submicrometer Aerosols in a Suburban Forest
  Yu Xu; Yuzo Miyazaki; Eri Tachibana; Kei Sato; Sathiyamurthi Ramasamy; Tomoki Mochizuki; Yasuhiro Sadanaga; Yoshihiro Nakashima; Yosuke Sakamoto; Kazuhide Matsuda; Yoshizumi Kajii
  Environmental Science and Technology, 54, 3, 1406, 1414, 04 Feb. 2020, [Peer-reviewed], [Corresponding author]
  English, Scientific journal
• Canopy fluxes of monoterpene, isoprene and isoprene oxidation products in a pine-oak forest
  Tomoki Mochizuki; Satoru Takanashi; Ryuichi Wada; Yuzo Miyazaki; Takashi Nakano; Akira Tani
  JOURNAL OF AGRICULTURAL METEOROLOGY, 76, 1, 36, 43, 2020, [Peer-reviewed]
  English, Scientific journal
• Observation of vertical profiles of NO, O3, and vocs to estimate their sources and sinks by inverse modeling in a Japanese larch forest
  Ryuichi Wada; Masahito Ueyama; Akira Tani; Tomoki Mochizuki; Yuzo Miyazaki; Kimitaka Kawamura; Yoshiyuki Takahashi; Nobuko Saigusa; Satoru Takanashi; Takafumi Miyama; Takashi Nakano; Seiichiro Yonemura; Yutaka Matsumi; Genki Katata
  Journal of Agricultural Meteorology, 76, 1, 1, 10, 2020, [Peer-reviewed]
  Scientific journal
• Distributions and sources of low-molecular-weight monocarboxylic acids in gas and particles from a deciduous broadleaf forest in northern Japan
  Tomoki Mochizuki; Kimitaka Kawamura; Yuzo Miyazaki; Bhagawati Kunwar; Suresh Kumar Reddy Boreddy
  Atmospheric Chemistry and Physics, 19, 4, 2421, 2432, Feb. 2019, [Peer-reviewed]
  English, Scientific journal
• Atmospheric dry deposition of water-soluble nitrogen to the subarctic Western North Pacific Ocean during summer
  Jung, J; B. Han; B. Rodriguez; Y. Miyazaki; H. Y. Chung; K. Kim; J.-O. Choi; K. Park; I.-N. Kim; S. Kim; E. J. Yang; S.-H. Kang
  Atmosphere, 10, 351, 2019, [Peer-reviewed]
  English, Scientific journal
• Identification of secondary fatty alcohols in atmospheric aerosols in temperate forests
  Miyazaki, Y; D. Gowda; E. Tachibana; Y. Takahashi; T. Hiura
  Biogeosciences, 16, 10, 2181, 2188, 2019, [Peer-reviewed]
  English, Scientific journal
• Dicarboxylic acids, oxocarboxylic acids and α-dicarbonyls in atmospheric aerosols from Mt. Fuji, Japan: Implication for primary emission versus secondary formation
  Kunwar, B; K. Kawamura; S. Fujiwara; P. Fu; Y. Miyazaki; A. Pokhrel
  Atmospheric Research, 221, 1, 58, 71, 2019, [Peer-reviewed]
  English, Scientific journal
• Chemical transfer of dissolved organic matter from surface seawater to sea spray water-soluble organic aerosol in the marine atmosphere
  Yuzo Miyazaki; Youhei Yamashita; Kaori Kawana; Eri Tachibana; Sara Kagami; Michihiro Mochida; Koji Suzuki; Jun Nishioka
  Scientific Reports, 8, 1, 14861, Oct. 2018, [Peer-reviewed]
  English
• Hygroscopicity of Organic Aerosols and Their Contributions to CCN Concentrations Over a Midlatitude Forest in Japan
  Yange Deng; Sara Kagami; Shuhei Ogawa; Kaori Kawana; Tomoki Nakayama; Ryo Kubodera; Kouji Adachi; Tareq Hussein; Yuzo Miyazaki; Michihiro Mochida
  Journal of Geophysical Research: Atmospheres, Sep. 2018, [Peer-reviewed]
• Missing ozone-induced potential aerosol formation in a suburban deciduous forest
  T. Nakayama; Y. Kuruma; Y. Matsumi; Y. Morino; K. Sato; H. Tsurumaru; S. Ramasamy; Y. Sakamoto; S. Kato; Y. Miyazaki; T. Mochizuki; K. Kawamura; Y. Sadanaga; Y. Nakashima; K. Matsuda; Y. Kajii
  ATMOSPHERIC ENVIRONMENT, 171, 91, 97, Dec. 2017, [Peer-reviewed]
  English, Scientific journal
• Secondary formation of oxalic acid and related organic species from biogenic sources in a larch forest at the northern slope of Mt. Fuji
  Tomoki Mochizuki; Kimitaka Kawamura; Yuzo Miyazaki; Ryuichi Wada; Yoshiyuki Takahashi; Nobuko Saigusa; Akira Tani
  ATMOSPHERIC ENVIRONMENT, 166, 255, 262, Oct. 2017, [Peer-reviewed]
  English, Scientific journal
• Effects of chemical composition and mixing state on size-resolved hygroscopicity and cloud condensation nuclei activity of submicron aerosols at a suburban site in northern Japan in summer
  Astrid Mueller; Yuzo Miyazaki; Shankar G. Aggarwal; Yasuyuki Kitamori; Suresh K. R. Boreddy; Kimitaka Kawamura
  JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES, 122, 17, 9301, 9318, Sep. 2017, [Peer-reviewed]
  English, Scientific journal
• Evidence of a reduction in cloud condensation nuclei activity of water-soluble aerosols caused by biogenic emissions in a cool-temperate forest
  Astrid Mueller; Yuzo Miyazaki; Eri Tachibana; Kimitaka Kawamura; Tsutom Hiura
  SCIENTIFIC REPORTS, 7, 8452, Aug. 2017, [Peer-reviewed]
  English, Scientific journal
• Identification of secondary fatty alcohols in atmospheric aerosols at two different forest sites
  Gowda Divyavani; Miyazaki Yuzo; Takahashi Yoshiyuki; Hiura Tsutom
  Abstracts of Annual Meeting of the Geochemical Society of Japan, 64, 89, 89, GEOCHEMICAL SOCIETY OF JAPAN, 2017
  Japanese,

• Ambient measurements and survey of the sources of gaseous glyoxal in suburban site in Tokyo during summer season
  Nakashima, Y; H. Tsurumaru; R. Sathiyamurthi; Y. Sakamoto; S. Kato; Y. Sadanaga; T. Nakayama; Y. Miyazaki; T. Mochizuki; R. Wada; K. Matsuda; Y. Kajii
  J. Jpn. Soc. Atmos. Environ., 52, 6, 167, 176, Japan Society for Atmospheric Environment, 2017, [Peer-reviewed]
  Japanese,

  Glyoxal is one of the smallest dicarbonyl compounds existing in both the gas phase and in an aerosol. The primary sources of glyoxal have been known to be the photochemical products of the non-methane hydrocarbons. Since the heterogeneous reactions of glyoxal play an important role in the formation of secondary organic aerosols, the studies of the formation process and sources of glyoxal have been reported. However, the reports for the ambient measurements of glyoxal are limited. In this study, the ambient measurements of gaseous glyoxal by incoherent broad band cavity enhanced absorption spectroscopy (IBBCEAS), a novel technique for the measurements of trace species, were carried out in the field museum of Tama hills (FM Tama) maintained and operated by the Tokyo University of Agriculture and Technology during the summer season, July 31–Aug. 7, 2015. During the measurement periods, the average concentration of gaseous glyoxal was 0.24±0.18 ppbv, comparable to the previous measurements in urban areas. From the correlation with gaseous glyoxal and trace species, it is indicated that the sources of glyoxal around the measurement point were photochemical products.

• Characterization of Chromophoric Water-Soluble Organic Matter in Urban, Forest, and Marine Aerosols by HR-ToF-AMS Analysis and Excitation Emission Matrix Spectroscopy
  Qingcai Chen; Yuzo Miyazaki; Kimitaka Kawamura; Kiyoshi Matsumoto; Sean Coburn; Rainer Volkamer; Yoko Iwamoto; Sara Kagami; Yange Deng; Shuhei Ogawa; Sathiyamurthi Ramasamy; Shungo Kato; Akira Ida; Yoshizumi Kajii; Michihiro Mochida
  ENVIRONMENTAL SCIENCE & TECHNOLOGY, 50, 19, 10351, 10360, Oct. 2016, [Peer-reviewed]
  English, Scientific journal
• Improved technique for measuring the size distribution of black carbon particles in liquid water
  Tatsuhiro Mori; Nobuhiro Moteki; Sho Ohata; Makoto Koike; Kumiko Goto-Azuma; Yuzo Miyazaki; Yutaka Kondo
  AEROSOL SCIENCE AND TECHNOLOGY, 50, 3, 242, 254, Mar. 2016, [Peer-reviewed]
  English, Scientific journal
• Contribution of dissolved organic matter to submicron water-soluble organic aerosols in the marine boundary layer
  Miyazaki Yuzo; Coburn Sean; Muller Astrid; Ono Kaori; T. Ho David; Bradley Pierce R.; Kawamura Kimitaka; Volkamer Rainer
  Abstracts of Annual Meeting of the Geochemical Society of Japan, 63, 96, 96, GEOCHEMICAL SOCIETY OF JAPAN, 2016
  Japanese,

• Contribution of dissolved organic matter to submicron water-soluble organic aerosols in the marine boundary layer over the eastern equatorial Pacific
  Yuzo Miyazaki; Sean Coburn; Kaori Ono; David T. Ho; R. Bradley Pierce; Kimitaka Kawamura; Rainer Volkamer
  ATMOSPHERIC CHEMISTRY AND PHYSICS, 16, 12, 7695, 7707, 2016, [Peer-reviewed]
  English, Scientific journal
• Emission of methyl chloride from a fern growing in subtropical, temperate, and cool-temperate climate zones
  Yoko Yokouchi; Akio Takenaka; Yuzo Miyazaki; Kimitaka Kawamura; Tsutom Hiura
  JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES, 120, 6, 1142, 1149, Jun. 2015, [Peer-reviewed]
  English, Scientific journal
• Latitudinal distributions of atmospheric dicarboxylic acids, oxocarboxylic acids, and -dicarbonyls over the western North Pacific: Sources and formation pathways
  Srinivas Bikkina; Kimitaka Kawamura; Yuzo Miyazaki
  JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES, 120, 10, 5010, 5035, May 2015, [Peer-reviewed]
  English, Scientific journal
• Latitudinal distributions of atmospheric dicarboxylic acids, oxocarboxylic acids, and α-dicarbonyls over the western north pacific: Sources and formation pathways
  Srinivas Bikkina; Kimitaka Kawamura; Yuzo Miyazaki
  Journal of Geophysical Research, 120, 10, 5010, 5035, Wiley-Blackwell, 2015, [Peer-reviewed]
  English, Scientific journal
• Emissions of biogenic volatile organic compounds and subsequent formation of secondary organic aerosols in a Larix kaempferi forest
  T. Mochizuki; Y. Miyazaki; K. Ono; R. Wada; Y. Takahashi; N. Saigusa; K. Kawamura; A. Tani
  ATMOSPHERIC CHEMISTRY AND PHYSICS, 15, 20, 12029, 12041, 2015, [Peer-reviewed]
  English, Scientific journal
• Secondary Production of Organic Aerosols from Biogenic VOCs over Mt. Fuji, Japan
  Pingqing Fu; Kimitaka Kawamura; Jing Chen; Yuzo Miyazaki
  ENVIRONMENTAL SCIENCE & TECHNOLOGY, 48, 15, 8491, 8497, Aug. 2014, [Peer-reviewed]
  English, Scientific journal
• High abundances of oxalic, azelaic, and glyoxylic acids and methylglyoxal in the open ocean with high biological activity: Implication for secondary OA formation from isoprene
  Srinivas Bikkina; Kimitaka Kawamura; Yuzo Miyazaki; Pingqing Fu
  GEOPHYSICAL RESEARCH LETTERS, 41, 10, 3649, 3657, May 2014, [Peer-reviewed]
  English, Scientific journal
• Seasonal cycles of water-soluble organic nitrogen aerosols in a deciduous broadleaf forest in northern Japan
  Yuzo Miyazaki; PingQing Fu; Kaori Ono; Eri Tachibana; Kimitaka Kawamura
  Journal of Geophysical Research, 119, 3, 1440, 1454, Wiley-Blackwell, 16 Feb. 2014, [Peer-reviewed]
  English, Scientific journal
• Seasonal cycles of water-soluble organic nitrogen aerosols in a deciduous broadleaf forest in northern Japan
  Yuzo Miyazaki; PingQing Fu; Kaori Ono; Eri Tachibana; Kimitaka Kawamura
  JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES, 119, 3, 1440, 1454, Feb. 2014, [Peer-reviewed]
  English, Scientific journal
• Low-molecular-weight hydroxyacids in marine atmospheric aerosol: evidence of a marine microbial origin
  Y. Miyazaki; M. Sawano; K. Kawamura
  BIOGEOSCIENCES, 11, 16, 4407, 4414, 2014, [Peer-reviewed]
  English, Scientific journal
• Different characteristics of new particle formation between urban and deciduous forest sites in Northern Japan during the summers of 2010-2011
  J. Jung; Y. Miyazaki; K. Kawamura
  ATMOSPHERIC CHEMISTRY AND PHYSICS, 13, 1, 51, 68, 2013, [Peer-reviewed]
  English, Scientific journal
• Evidence of formation of submicrometer water-soluble organic aerosols at a deciduous forest site in northern Japan in summer
  Yuzo Miyazaki; Jinsang Jung; Pingqing Fu; Yasuko Mizoguchi; Katsumi Yamanoi; Kimitaka Kawamura
  JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES, 117, D19213, doi:10.1029/ 2012JD018250, Oct. 2012, [Peer-reviewed]
  English, Scientific journal
• Reviews of Chemical Properties and Secondary Formation of Water-Soluble Organic Aerosols
  MIYAZAKI Yuzo
  Earozoru Kenkyu, 27, 1, 24, 33, Japan Association of Aerosol Science and Technology, Mar. 2012, [Peer-reviewed], [Invited]
  Japanese, Scientific journal, Over the past decade, considerable progress has been made in understanding sources and formation processes of water-soluble organic aerosol (OA) in the atmosphere. This review article discusses the current knowledge on chemical characteristics, formation processes, and physical properties of water-soluble OA. In particular, organic aerosols formed in cloud and aerosol water are suggested to contribute substantially to OA mass. The review emphasizes the important roles of water-soluble organics in secondary OA formation including aqueous-phase reactions through field and laboratory studies.
  
• Chemical Characteristics of Water-Soluble Organic Carbon in the Asian Outflow
  MIYAZAKI Yuzo
  天気, 59, 1, 23, 32, 日本気象学会, Jan. 2012, [Peer-reviewed], [Invited]
  Japanese
• Seasonal variations of stable carbon isotopic composition and biogenic tracer compounds of water-soluble organic aerosols in a deciduous forest
  Y. Miyazaki; P. Q. Fu; K. Kawamura; Y. Mizoguchi; K. Yamanoi
  ATMOSPHERIC CHEMISTRY AND PHYSICS, 12, 3, 1367, 1376, 2012, [Peer-reviewed]
  English, Scientific journal
• Evidence of formation of submicrometer water-soluble organic aerosols at a deciduous forest site in northern Japan in summer
  Yuzo Miyazaki; Jinsang Jung; Pingqing Fu; Yasuko Mizoguchi; Katsumi Yamanoi; Kimitaka Kawamura
  Journal of Geophysical Research Atmospheres, 117, 19, Blackwell Publishing Ltd, 2012, [Peer-reviewed]
  English, Scientific journal
• Seasonal and diurnal variations of black carbon and organic carbon aerosols in Bangkok
  L. K. Sahu; Y. Kondo; Y. Miyazaki; Prapat Pongkiatkul; N. T. Kim Oanh
  JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES, 116, D15302, doi:10.1029/2010JD015563, Aug. 2011, [Peer-reviewed]
  English, Scientific journal
• Hygroscopicity and cloud condensation nucleus activity of marine aerosol particles over the western North Pacific
  Michihiro Mochida; Chiharu Nishita-Hara; Hiroshi Furutani; Yuzo Miyazaki; Jinyoung Jung; Kimitaka Kawamura; Mitsuo Uematsu
  JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES, 116, D06204, doi:10.1029/2010JD014759, Mar. 2011, [Peer-reviewed]
  English, Scientific journal
• Characterization and source apportionment of submicron aerosol with aerosol mass spectrometer during the PRIDE-PRD 2006 campaign
  R. Xiao; N. Takegawa; M. Zheng; Y. Kondo; Y. Miyazaki; T. Miyakawa; M. Hu; M. Shao; L. Zeng; Y. Gong; K. Lu; Z. Deng; Y. Zhao; Y. H. Zhang
  ATMOSPHERIC CHEMISTRY AND PHYSICS, 11, 14, 6911, 6929, 2011, [Peer-reviewed]
  English, Scientific journal
• Latitudinal distributions of organic nitrogen and organic carbon in marine aerosols over the western North Pacific
  Y. Miyazaki; K. Kawamura; J. Jung; H. Furutani; M. Uematsu
  ATMOSPHERIC CHEMISTRY AND PHYSICS, 11, 7, 3037, 3049, 2011
  English, Scientific journal
• Seasonal variations of water-soluble organic aerosols in boreal forest
  Miyazaki Yuzo; Fu PingQing; Kawamura Kimitaka; Yamanoi Katsumi
  Abstracts of Annual Meeting of the Geochemical Society of Japan, 58, 28, 28, GEOCHEMICAL SOCIETY OF JAPAN, 2011
  北方森林生態系における水溶性有機エアロゾルの主要な発生源を明らかにすることを目的とし、落葉広葉樹演習林の観測タワーで約1年半以上にわたり採取した大気エアロゾルサンプルを用いて水溶性有機炭素（WSOC）とその安定炭素同位体比（δ13C-WSOC）の測定を行なった。δ13C-WSOCは、初夏から秋季にかけて値が減少する明瞭な季節変化を示し、純生態系CO2交換量との相関からWSOCへの森林植生寄与を表す指標として有用であることが示唆された。WSOC濃度や植生起源有機物トレーサーの季節変動や鉛直勾配から、森林植生の成長期である初夏を中心に地表付近の植生や土壌を含む林床が森林キャノピー層内における水溶性有機エアロゾルの発生源として重要であることが示唆された。
• Seasonal and diurnal variations of black carbon and organic carbon aerosols in Bangkok
  L. K. Sahu; Y. Kondo; Y. Miyazaki; Prapat Pongkiatkul; N. T. Kim Oanh
  Journal of Geophysical Research Atmospheres, 116, 15, Blackwell Publishing Ltd, 2011, [Peer-reviewed]
  English, Scientific journal
• Hygroscopicity and cloud condensation nucleus activity of marine aerosol particles over the western North Pacific
  Michihiro Mochida; Chiharu Nishita-Hara; Hiroshi Furutani; Yuzo Miyazaki; Jinyoung Jung; Kimitaka Kawamura; Mitsuo Uematsu
  Journal of Geophysical Research Atmospheres, 116, 6, 2011, [Peer-reviewed]
  Scientific journal
• Size distributions and chemical characterization of water-soluble organic aerosols over the western North Pacific in summer
  Yuzo Miyazaki; Kimitaka Kawamura; Maki Sawano
  JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES, 115, D23210, doi:10.1029/2010JD014439, Dec. 2010, [Peer-reviewed]
  English, Scientific journal
• Formation and Transport of Aerosols in Tokyo in Relation to Their Physical and Chemical Properties: A Review
  Yutaka Kondo; Nobuyuki Takegawa; Hitoshi Matsui; Takuma Miyakawa; Makoto Koike; Yuzo Miyazaki; Yugo Kanaya; Michihiro Mochida; Mikinori Kuwata; Yu Morino; Manabu Shiraiwa
  JOURNAL OF THE METEOROLOGICAL SOCIETY OF JAPAN, 88, 4, 597, 624, Aug. 2010, [Peer-reviewed]
  English
• Size distributions of organic nitrogen and carbon in remote marine aerosols: Evidence of marine biological origin based on their isotopic ratios
  Yuzo Miyazaki; Kimitaka Kawamura; Maki Sawano
  GEOPHYSICAL RESEARCH LETTERS, 37, L06803, doi:10.1029/2010GL042483, Mar. 2010, [Peer-reviewed]
  English, Scientific journal
• Size distributions and chemical characterization of water-soluble organic aerosols over the western North Pacific in summer
  Yuzo Miyazaki; Kimitaka Kawamura; Maki Sawano
  Journal of Geophysical Research Atmospheres, 115, 23, Blackwell Publishing Ltd, 2010, [Peer-reviewed]
  English, Scientific journal
• Temporal variations of elemental carbon in Beijing
  S. Han; Y. Kondo; N. Oshima; N. Takegawa; Y. Miyazaki; M. Hu; P. Lin; Z. Deng; Y. Zhao; N. Sugimoto; Y. Wu
  JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES, 114, D23202, doi:10.1029/2009JD012027, Dec. 2009, [Peer-reviewed]
  English, Scientific journal
• Dicarboxylic acids and water-soluble organic carbon in aerosols in New Delhi, India, in winter: Characteristics and formation processes
  Yuzo Miyazaki; Shankar G. Aggarwal; Khem Singh; Prabhat K. Gupta; Kimitaka Kawamura
  JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES, 114, D19206, doi:10.1029/2009JD011790, Oct. 2009, [Peer-reviewed]
  English, Scientific journal
• Spatial and temporal variations of aerosols around Beijing in summer 2006: Model evaluation and source apportionment
  H. Matsui; M. Koike; Y. Kondo; N. Takegawa; K. Kita; Y. Miyazaki; M. Hu; S. Y. Chang; D. R. Blake; J. D. Fast; R. A. Zaveri; D. G. Streets; Q. Zhang; T. Zhu
  Journal of Geophysical Research Atmospheres, 114, 15, Blackwell Publishing Ltd, 16 Aug. 2009, [Peer-reviewed]
  English, Scientific journal
• Spatial and temporal variations of aerosols around Beijing in summer 2006: Model evaluation and source apportionment
  H. Matsui; M. Koike; Y. Kondo; N. Takegawa; K. Kita; Y. Miyazaki; M. Hu; S. -Y. Chang; D. R. Blake; J. D. Fast; R. A. Zaveri; D. G. Streets; Q. Zhang; T. Zhu
  JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES, 114, Aug. 2009, [Peer-reviewed]
  English, Scientific journal
• Formation of submicron sulfate and organic aerosols in the outflow from the urban region of the Pearl River Delta in China
  R. Xiao; N. Takegawa; Y. Kondo; Y. Miyazaki; T. Miyakawa; M. Hu; M. Shao; L. M. Zeng; A. Hofzumahaus; F. Holland; K. Lu; N. Sugimoto; Y. Zhao; Y. H. Zhang
  ATMOSPHERIC ENVIRONMENT, 43, 24, 3754, 3763, Aug. 2009, [Peer-reviewed]
  English, Scientific journal
• Chemical characterization of water-soluble organic carbon aerosols at a rural site in the Pearl River Delta, China, in the summer of 2006
  Y. Miyazaki; Y. Kondo; M. Shiraiwa; N. Takegawa; T. Miyakawa; S. Han; K. Kita; M. Hu; Z. Q. Deng; Y. Zhao; N. Sugimoto; D. R. Blake; R. J. Weber
  Journal of Geophysical Research Atmospheres, 114, 14, Blackwell Publishing Ltd, 27 Jul. 2009, [Peer-reviewed]
  English, Scientific journal
• Chemical characterization of water-soluble organic carbon aerosols at a rural site in the Pearl River Delta, China, in the summer of 2006
  Y. Miyazaki; Y. Kondo; M. Shiraiwa; N. Takegawa; T. Miyakawa; S. Han; K. Kita; M. Hu; Z. Q. Deng; Y. Zhao; N. Sugimoto; D. R. Blake; R. J. Weber
  JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES, 114, D14208, doi:10.1029/2009JD011736, Jul. 2009, [Peer-reviewed]
  English, Scientific journal
• Seasonal and diurnal variations of organic carbon in PM<inf>2.5</inf>in Beijing and the estimation of secondary organic carbon
  Peng Lin; Min Hu; Z. Deng; J. Slanina; S. Han; Y. Kondo; N. Takegawa; Y. Miyazaki; Y. Zhao; N. Sugimoto
  Journal of Geophysical Research Atmospheres, 114, 11, Blackwell Publishing Ltd, 16 Jun. 2009, [Peer-reviewed]
  English, Scientific journal
• Seasonal and diurnal variations of organic carbon in PM2.5 in Beijing and the estimation of secondary organic carbon
  Peng Lin; Min Hu; Z. Deng; J. Slanina; S. Han; Y. Kondo; N. Takegawa; Y. Miyazaki; Y. Zhao; N. Sugimoto
  JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES, 114, D00G11, Jun. 2009, [Peer-reviewed]
  English, Scientific journal
• Hygroscopic growth of tropospheric particle number size distributions over the North China Plain
  P. Achtert; W. Birmili; A. Nowak; B. Wehner; A. Wiedensohler; N. Takegawa; Y. Kondo; Y. Miyazaki; M. Hu; T. Zhu
  Journal of Geophysical Research Atmospheres, 114, 8, Blackwell Publishing Ltd, 27 Apr. 2009, [Peer-reviewed]
  English, Scientific journal
• Variability of submicron aerosol observed at a rural site in Beijing in the summer of 2006
  N. Takegawa; T. Miyakawa; M. Kuwata; Y. Kondo; Y. Zhao; S. Han; K. Kita; Y. Miyazaki; Z. Deng; R. Xiao; M. Hu; D. Van Pinxteren; H. Herrmann; A. Hofzumahaus; F. Holland; A. Wahner; D. R. Blake; N. Sugimoto; T. Zhu
  Journal of Geophysical Research Atmospheres, 114, 7, Blackwell Publishing Ltd, 16 Apr. 2009, [Peer-reviewed]
  English, Scientific journal
• Hygroscopic growth of tropospheric particle number size distributions over the North China Plain
  P. Achtert; W. Birmili; A. Nowak; B. Wehner; A. Wiedensohler; N. Takegawa; Y. Kondo; Y. Miyazaki; M. Hu; T. Zhu
  JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES, 114, D00G07, doi:10.1029/2008JD010921, Apr. 2009, [Peer-reviewed]
  English, Scientific journal
• Variability of submicron aerosol observed at a rural site in Beijing in the summer of 2006
  N. Takegawa; T. Miyakawa; M. Kuwata; Y. Kondo; Y. Zhao; S. Han; K. Kita; Y. Miyazaki; Z. Deng; R. Xiao; M. Hu; D. van Pinxteren; H. Herrmann; A. Hofzumahaus; F. Holland; A. Wahner; D. R. Blake; N. Sugimoto; T. Zhu
  JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES, 114, Apr. 2009, [Peer-reviewed]
  English, Scientific journal
• Aging of black carbon in outflow from anthropogenic sources using a mixing state resolved model: Model development and evaluation
  N. Oshima; M. Koike; Y. Zhang; Y. Kondo; N. Moteki; N. Takegawa; Y. Miyazaki
  Journal of Geophysical Research Atmospheres, 114, 6, D06210, Blackwell Publishing Ltd, 27 Mar. 2009, [Peer-reviewed]
  English, Scientific journal
• Aging of black carbon in outflow from anthropogenic sources using a mixing state resolved model: Model development and evaluation
  N. Oshima; M. Koike; Y. Zhang; Y. Kondo; N. Moteki; N. Takegawa; Y. Miyazaki
  JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES, 114, Mar. 2009, [Peer-reviewed]
  English, Scientific journal
• Secondary organic aerosol formation in urban air: Temporal variations and possible contributions from unidentified hydrocarbons
  H. Matsui; M. Koike; N. Takegawa; Y. Kondo; R. J. Griffin; Y. Miyazaki; Y. Yokouchi; T. Ohara
  Journal of Geophysical Research Atmospheres, 114, 4, Blackwell Publishing Ltd, 27 Feb. 2009, [Peer-reviewed]
  English, Scientific journal
• Anthropogenic aerosols observed in Asian continental outflow at Jeju Island, Korea, in spring 2005
  L. K. Sahu; Y. Kondo; Y. Miyazaki; M. Kuwata; M. Koike; N. Takegawa; H. Tanimoto; H. Matsueda; S. C. Yoon; Y. J. Kim
  Journal of Geophysical Research Atmospheres, 114, 3, Blackwell Publishing Ltd, 16 Feb. 2009, [Peer-reviewed]
  English, Scientific journal
• Anthropogenic aerosols observed in Asian continental outflow at Jeju Island, Korea, in spring 2005
  L. K. Sahu; Y. Kondo; Y. Miyazaki; M. Kuwata; M. Koike; N. Takegawa; H. Tanimoto; H. Matsueda; S. C. Yoon; Y. J. Kim
  JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES, 114, D03301, doi:10.1029/2008JD010306, Feb. 2009, [Peer-reviewed]
  English, Scientific journal
• Secondary organic aerosol formation in urban air: Temporal variations and possible contributions from unidentified hydrocarbons
  H. Matsui; M. Koike; N. Takegawa; Y. Kondo; R. J. Griffin; Y. Miyazaki; Y. Yokouchi; T. Ohara
  JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES, 114, D04201, Feb. 2009, [Peer-reviewed]
  English, Scientific journal
• Temporal variations of elemental carbon in Beijing
  S. Han; Y. Kondo; N. Oshima; N. Takegawa; Y. Miyazaki; M. Hu; P. Lin; Z. Deng; Y. Zhao; N. Sugimoto; Y. Wu
  Journal of Geophysical Research Atmospheres, 114, 23, Blackwell Publishing Ltd, 2009, [Peer-reviewed]
  English, Scientific journal
• Dicarboxylic acids and water-soluble organic carbon in aerosols in New Delhi, India, in winter: Characteristics and formation processes
  Yuzo Miyazaki; Shankar G. Aggarwal; Khem Singh; Prabhat K. Gupta; Kimitaka Kawamura
  Journal of Geophysical Research Atmospheres, 114, 19, Blackwell Publishing Ltd, 2009, [Peer-reviewed]
  English, Scientific journal
• Performance of an Aerodyne Aerosol Mass Spectrometer (AMS) during Intensive Campaigns in China in the Summer of 2006
  N. Takegawa; T. Miyakawa; M. Watanabe; Y. Kondo; Y. Miyazaki; S. Han; Y. Zhao; D. van Pinxteren; E. Bruggemann; T. Gnauk; H. Herrmann; R. Xiao; Z. Deng; M. Hu; T. Zhu; Y. Zhang
  AEROSOL SCIENCE AND TECHNOLOGY, 43, 3, 189, 204, 2009, [Peer-reviewed]
  English, Scientific journal
• Stabilization of the Mass Absorption Cross Section of Black Carbon for Filter-Based Absorption Photometry by the use of a Heated Inlet
  Y. Kondo; L. Sahu; M. Kuwata; Y. Miyazaki; N. Takegawa; N. Moteki; J. Imaru; S. Han; T. Nakayama; N. T. Kim Oanh; M. Hu; Y. J. Kim; K. Kita
  AEROSOL SCIENCE AND TECHNOLOGY, 43, 8, 741, 756, 2009, [Peer-reviewed]
  English, Scientific journal
• Formation and transport of oxidized reactive nitrogen, ozone, and secondary organic aerosol in Tokyo
  Y. Kondo; Y. Morino; M. Fukuda; Y. Kanaya; Y. Miyazaki; N. Takegawa; H. Tanimoto; R. McKenzie; P. Johnston; D. R. Blake; T. Murayama; M. Koike
  JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES, 113, D21, doi:10.1029/2008JD010134, Nov. 2008, [Peer-reviewed]
  English, Scientific journal
• Characteristics of the transport and vertical structure of aerosols during ABC-EAREX2005
  In-Jin Choi; Sang-Woo Kim; Jiyoung Kim; Soon-Chang Yoon; Man-Hae Kim; Nobuo Sugimoto; Yutaka Kondo; Yuzo Miyazaki; Kwang-Joo Moon; Jin-Seok Han
  ATMOSPHERIC ENVIRONMENT, 42, 36, 8513, 8523, Nov. 2008, [Peer-reviewed]
  English, Scientific journal
• Mechanisms that influence the formation of high-ozone regions in the boundary layer downwind of the Asian continent in winter and spring
  Y. Kondo; R. C. Hudman; K. Nakamura; M. Koike; G. Chen; Y. Miyazaki; N. Takegawa; D. R. Blake; I. J. Simpson; M. Ko; K. Kita; T. Shirai; S. Kawakami
  JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES, 113, D15, Aug. 2008, [Peer-reviewed]
  English, Scientific journal
• Atmospheric hydrogen peroxide and organic hydroperoxides during PRIDE-PRD'06, China: their concentration, formation mechanism and contribution to secondary aerosols
  W. Hua; Z. M. Chen; C. Y. Jie; Y. Kondo; A. Hofzumahaus; N. Takegawa; C. C. Chang; K. D. Lu; Y. Miyazaki; K. Kita; H. L. Wang; Y. H. Zhang; M. Hu
  ATMOSPHERIC CHEMISTRY AND PHYSICS, 8, 22, 6755, 6773, 2008, [Peer-reviewed]
  English
• Aerosol optical properties in a rural environment near the mega-city Guangzhou, China: implications for regional air pollution, radiative forcing and remote sensing
  R. M. Garland; H. Yang; O. Schmid; D. Rose; A. Nowak; P. Achtert; A. Wiedensohler; N. Takegawa; K. Kita; Y. Miyazaki; Y. Kondo; M. Hu; M. Sha; L. M. Zeng; Y. H. Zhang; M. O. Andreae; U. Poeschl
  ATMOSPHERIC CHEMISTRY AND PHYSICS, 8, 17, 5161, 5186, 2008, [Peer-reviewed]
  English, Scientific journal
• Cloud condensation nuclei activity at Jeju Island, Korea in spring 2005
  M. Kuwata; Y. Kondo; Y. Miyazaki; Y. Komazaki; J. H. Kim; S. S. Yum; H. Tanimoto; H. Matsueda
  ATMOSPHERIC CHEMISTRY AND PHYSICS, 8, 11, 2933, 2948, 2008, [Peer-reviewed]
  English, Scientific journal
• Performance of a newly designed continuous soot monitoring system (COSMOS)
  Yuzo Miyazaki; Yutaka Kondo; Lokesh K. Sahu; Junichi Imaru; Nobuhiko Fukushima; Minoru Kano
  JOURNAL OF ENVIRONMENTAL MONITORING, 10, 10, 1195, 1201, 2008
  English, Scientific journal
• Mechanisms that influence the formation of high-ozone regions in the boundary layer downwind of the Asian continent in winter and spring
  Y. Kondo; R. C. Hudman; K. Nakamura; M. Koike; G. Chen; Y. Miyazaki; N. Takegawa; D. R. Blake; I. J. Simpson; M. Ko; K. Kita; T. Shirai; S. Kawakami
  Journal of Geophysical Research Atmospheres, 113, 15, Blackwell Publishing Ltd, 2008, [Peer-reviewed]
  English, Scientific journal
• Seasonal variations of atmospheric C<inf>2</inf>-C<inf>7</inf> nonmethane hydrocarbons in Tokyo
  Tomoko Shirai; Yoko Yokouchi; Donald R. Blake; Kazuyuki Kita; K. Izumi; M. Koike; Y. Komazaki; Y. Miyazaki; M. Fukuda; Y. Kondo
  Journal of Geophysical Research Atmospheres, 112, 24, Blackwell Publishing Ltd, 27 Dec. 2007, [Peer-reviewed]
  English, Scientific journal
• Seasonal variations of atmospheric C-2-C-7 nonmethane hydrocarbons in Tokyo
  Tomoko Shirai; Yoko Yokouchi; Donald R. Blake; Kazuyuki Kita; K. Izumi; M. Koike; Y. Komazaki; Y. Miyazaki; M. Fukuda; Y. Kondo
  JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES, 112, D24, Dec. 2007, [Peer-reviewed]
  English, Scientific journal
• Chemical characteristics of water-soluble organic carbon in the Asian outflow
  Yuzo Miyazaki; Yutaka Kondo; Sunghee Han; Makoto Koike; Daisuke Kodama; Yuichi Komazaki; Hiroshi Tanimoto; Hidekazu Matsueda
  Journal of Geophysical Research Atmospheres, 112, 22, Blackwell Publishing Ltd, 27 Nov. 2007, [Peer-reviewed]
  English, Scientific journal
• Chemical characteristics of water-soluble organic carbon in the Asian outflow
  Yuzo Miyazaki; Yutaka Kondo; Sunghee Han; Makoto Koike; Daisuke Kodama; Yuichi Komazaki; Hiroshi Tanimoto; Hidekazu Matsueda
  JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES, 112, D22, doi:10.1029/2007JD009116, Nov. 2007, [Peer-reviewed]
  English, Scientific journal
• Measurements of reactive nitrogen produced by tropical thunderstorms during BIBLE-C
  M. Koike; Y. Kondo; K. Kita; N. Takegawa; N. Nishi; T. Kashihara; S. Kawakami; S. Kudoh; D. Blake; T. Shirai; B. Liley; M. Ko; Y. Miyazaki; Z. Kawasaki; T. Ogawa
  JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES, 112, D18, Sep. 2007, [Peer-reviewed]
  English, Scientific journal
• Evolution of mixing state of black carbon in polluted air from Tokyo
  M. Shiraiwa; Y. Kondo; N. Moteki; N. Takegawa; Y. Miyazaki; D. R. Blake
  GEOPHYSICAL RESEARCH LETTERS, 34, 16, Aug. 2007, [Peer-reviewed]
  English, Scientific journal
• Evolution of mixing state of black carbon particles: Aircraft measurements over the western Pacific in March 2004
  N. Moteki; Y. Kondo; Y. Miyazaki; N. Takegawa; Y. Komazaki; G. Kurata; T. Shirai; D. R. Blake; T. Miyakawa; M. Koike
  GEOPHYSICAL RESEARCH LETTERS, 34, 11, Jun. 2007, [Peer-reviewed]
  English, Scientific journal
• Intercomparison of two different thermal-optical elemental carbons and optical black carbon during ABC-EAREX2005
  Min-Suk Bae; Chun-Sang Hong; Young J. Kim; Jin-Seok Han; Kwang-Ju Moon; Yutaka Kondo; Yuichi Komazaki; Yuzo Miyazaki
  ATMOSPHERIC ENVIRONMENT, 41, 13, 2791, 2803, Apr. 2007, [Peer-reviewed]
  English, Scientific journal
• Oxygenated and water-soluble organic aerosols in Tokyo
  Y. Kondo; Y. Miyazaki; N. Takegawa; T. Miyakawa; R. J. Weber; J. L. Jimenez; Q. Zhang; D. R. Worsnop
  JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES, 112, D1, doi:10.1029/2006JD007056, Jan. 2007, [Peer-reviewed]
  English, Scientific journal
• Time-resolved measurements of water-soluble organic carbon in Tokyo
  Y. Miyazaki; Y. Kondo; N. Takegawa; Y. Komazaki; M. Fukuda; K. Kawamura; M. Mochida; K. Okuzawa; R. J. Weber
  JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES, 111, D23, doi:10.1029/2006JD007125, Dec. 2006, [Peer-reviewed]
  English, Scientific journal
• Partitioning of HNO3 and particulate nitrate over Tokyo: Effect of vertical mixing
  Y. Morino; Y. Kondo; N. Takegawa; Y. Miyazaki; K. Kita; Y. Komazaki; M. Fukuda; T. Miyakawa; N. Moteki; D. R. Worsnop
  JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES, 111, D15, Aug. 2006, [Peer-reviewed]
  English, Scientific journal
• Evolution of submicron organic aerosol in polluted air exported from Tokyo
  N. Takegawa; T. Miyakawa; Y. Kondo; D. R. Blake; Y. Kanaya; M. Koike; M. Fukuda; Y. Komazaki; Y. Miyazaki; A. Shimono; T. Takeuchi
  GEOPHYSICAL RESEARCH LETTERS, 33, 15, Aug. 2006, [Peer-reviewed]
  English, Scientific journal
• A chemical ionization mass spectrometer for ground-based measurements of nitric acid
  Kazuyuki Kita; Yu Morino; Yutaka Kondo; Yuichi Komazaki; Nobuyuki Takegawa; Yuzo Miyazaki; Jun Hirokawa; Shigeru Tanaka; Thomas L. Thompson; Ru-Shan Gao; David W. Fahey
  JOURNAL OF ATMOSPHERIC AND OCEANIC TECHNOLOGY, 23, 8, 1104, 1113, Aug. 2006, [Peer-reviewed]
  English, Scientific journal
• Temporal variations of elemental carbon in Tokyo
  Y. Kondo; Y. Komazaki; Y. Miyazaki; N. Moteki; N. Takegawa; D. Kodama; S. Deguchi; M. Nogami; M. Fukuda; T. Miyakawa; Y. Morino; M. Koike; Hiromu Sakurai; Kensei Ehara
  Journal of Geophysical Research Atmospheres, 111, 12, Blackwell Publishing Ltd, 27 Jun. 2006, [Peer-reviewed]
  English, Scientific journal
• Temporal variations of elemental carbon in Tokyo
  Y. Kondo; Y. Komazaki; Y. Miyazaki; N. Moteki; N. Takegawa; D. Kodama; S. Deguchi; M. Nogami; M. Fukuda; T. Miyakawa; Y. Morino; M. Koike; H. Sakurai; K. Ehara
  JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES, 111, D12, Jun. 2006, [Peer-reviewed]
  English, Scientific journal
• Contribution of particulate nitrate to airborne measurements of total reactive nitrogen
  Y Miyazaki; Y Kondo; N Takegawa; RJ Weber; M Koike; K Kita; M Fukuda; Y Ma; AD Clarke; VN Kapustin; F Flocke; AJ Weinheimer; M Zondlo; FL Eisele; DR Blake; B Liley
  JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES, 110, D15, doi:10.1029/2004JD005502, Aug. 2005, [Peer-reviewed]
  English, Scientific journal
• Characterization of an Aerodyne Aerosol Mass Spectrometer (AMS): Intercomparison with other aerosol instruments
  N Takegawa; Y Miyazaki; Y Kondo; Y Komazaki; T Miyakawa; JL Jimenez; JT Jayne; DR Worsnop; JD Allan; RJ Weber
  AEROSOL SCIENCE AND TECHNOLOGY, 39, 8, 760, 770, Aug. 2005, [Peer-reviewed]
  English, Scientific journal
• Removal of NOx and NOy in Asian outflow plumes: Aircraft measurements over the western Pacific in Januray 2002
  N. Takegawa; Y. Kondo; M. Koike; G. Chen; T. Machida; T. Watai; D. R. Blake; D. G. Streets; J. H. Woo; G. R. Carmichael; K. Kita; Y. Miyazaki; T. Shirai; J. B. Liley; T. Ogawa
  Journal of Geophysical Research D: Atmospheres, 109, 23, 1, 16, 16 Dec. 2004, [Peer-reviewed]
  English, Scientific journal
• Asian chemical outflow to the Pacific in late spring observed during the PEACE-B aircraft mission
  N. Oshima; M. Koike; H. Nakamura; Y. Kondo; N. Takegawa; Y. Miyazaki; D. R. Blake; T. Shirai; K. Kita; S. Kawakami; T. Ogawa
  Journal of Geophysical Research D: Atmospheres, 109, 23, 1, 17, 16 Dec. 2004, [Peer-reviewed]
  English, Scientific journal
• Photochemistry of ozone over the western Pacific from winter to spring
  Y. Kondo; K. Nakamura; G. Chen; N. Takegawa; M. Koike; Y. Miyazaki; K. Kita; J. Crawford; M. Ko; D. R. Blake; S. Kawakami; T. Shirai; B. Liley; Y. Wang; T. Ogawa
  Journal of Geophysical Research D: Atmospheres, 109, 23, 1, 19, 16 Dec. 2004, [Peer-reviewed]
  English, Scientific journal
• Asian chemical outflow to the Pacific in late spring observed during the PEACE-B aircraft mission
  N Oshima; M Koike; H Nakamura; Y Kondo; N Takegawa; Y Miyazaki; DR Blake; T Shirai; K Kita; S Kawakami; T Ogawa
  JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES, 109, D23, Dec. 2004, [Peer-reviewed]
  English, Scientific journal
• Photochemistry of ozone over the western Pacific from winter to spring
  Y Kondo; K Nakamura; G Chen; N Takegawa; M Koike; Y Miyazaki; K Kita; J Crawford; M Ko; DR Blake; S Kawakami; T Shirai; B Liley; Y Wang; T Ogawa
  JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES, 109, D23, Oct. 2004, [Peer-reviewed]
  English, Scientific journal
• Removal of NOx and NOy in Asian outflow plumes: Aircraft measurements over the western Pacific in January 2002
  N Takegawa; Y Kondo; M Koike; G Chen; T Machida; T Watai; DR Blake; DG Streets; JH Woo; GR Carmichael; K Kita; Y Miyazaki; T Shirai; JB Liley; T Ogawa
  JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES, 109, D23, Oct. 2004, [Peer-reviewed]
  English, Scientific journal
• Impacts of biomass burning in Southeast Asia on ozone and reactive nitrogen over the western Pacific in spring
  Y. Kondo; Y. Morino; N. Takegawa; M. Koike; K. Kita; Y. Miyazaki; G. W. Sachse; S. A. Vay; M. A. Avery; F. Flocke; A. J. Weinheimer; F. L. Eisele; M. A. Zondlo; R. J. Weber; H. B. Singh; G. Chen; J. Crawford; D. R. Blake; H. E. Fuelberg; A. D. Clarke; R. W. Talbot; S. T. Sandholm; E. V. Browell; D. G. Streets; B. Liley
  Journal of Geophysical Research D: Atmospheres, 109, 15, D15, S12, 16 Aug. 2004, [Peer-reviewed]
  English, Scientific journal
• Impacts of biomass burning in Southeast Asia on ozone and reactive nitrogen over the western Pacific in spring
  Y Kondo; Y Morino; N Takegawa; M Koike; K Kita; Y Miyazaki; GW Sachse; SA Vay; MA Avery; F Flocke; AJ Weinheimer; FL Eisele; MA Zondlo; RJ Weber; HB Singh; G Chen; J Crawford; DR Blake; HE Fuelberg; AD Clarke; RW Talbot; ST Sandholm; EV Browell; DG Streets; B Liley
  JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES, 109, D15, Jul. 2004, [Peer-reviewed]
  English, Scientific journal
• Measurement of NO2 by the photolysis conversion technique during the Transport and Chemical Evolution Over the Pacific (TRACE-P) campaign
  K Nakamura; Y Kondo; G Chen; JH Crawford; N Takegawa; M Koike; K Kita; Y Miyazaki; RE Shetter; BL Lefer; M Avery; J Matsumoto
  JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES, 108, D24, 4752, Dec. 2003, [Peer-reviewed]
  English, Scientific journal
• Export of anthropogenic reactive nitrogen and sulfur compounds from the East Asia region in spring
  M Koike; Y Kondo; K Kita; N Takegawa; Y Masui; Y Miyazaki; MW Ko; AJ Weinheimer; F Flocke; RJ Weber; DC Thornton; GW Sachse; SA Vay; DR Blake; DG Streets; FL Eisele; ST Sandholm; HB Singh; RW Talbot
  JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES, 108, D20, 8789, Oct. 2003, [Peer-reviewed]
  English, Scientific journal
• Synoptic-scale transport of reactive nitrogen over the western Pacific in spring
  Y Miyazaki; Y Kondo; M Koike; HE Fuelberg; CM Kiley; K Kita; N Takegawa; GW Sachse; F Flocke; AJ Weinheimer; HB Singh; FL Eisele; M Zondlo; RW Talbot; ST Sandholm; MA Avery; DR Blake
  JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES, 108, D20, doi:10.1029/2002JD003248, Sep. 2003, [Peer-reviewed]
  English, Scientific journal
• Removal of NOx and NOy in biomass burning plumes in the boundary layer over northern Australia
  N Takegawa; Y Kondo; M Koike; M Ko; K Kita; DR Blake; N Nishi; W Hu; JB Liley; S Kawakami; T Shirai; Y Miyazaki; H Ikeda; J Russel-Smith; T Ogawa
  JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES, 108, D10, 8789, May 2003, [Peer-reviewed]
  English, Scientific journal
• Photochemical production of O-3 in biomass burning plumes in the boundary layer over northern Australia
  N Takegawa; Y Kondo; M Ko; M Koike; K Kita; DR Blake; W Hu; C Scott; S Kawakami; Y Miyazaki; J Russell-Smith; T Ogawa
  GEOPHYSICAL RESEARCH LETTERS, 30, 10, 1500, May 2003, [Peer-reviewed]
  English, Scientific journal
• Effects of biomass burning and lightning on atmospheric chemistry over Australia and South-east Asia
  Y Kondo; N Takegawa; Y Miyazaki; M Ko; M Koike; K Kita; S Kawakami; T Shirai; T Ogawa; DR Blake; B Liley; J Russell-
  INTERNATIONAL JOURNAL OF WILDLAND FIRE, 12, 3-4, 271, 281, 2003, [Peer-reviewed]
  English, Scientific journal
• Effects of biomass burning, lightning, and convection on O-3, CO, and NOy over the tropical Pacific and Australia in August-October 1998 and 1999
  Y Kondo; M Koike; K Kita; H Ikeda; N Takegawa; S Kawakami; D Blake; SC Liu; M Ko; Y Miyazaki; H Irie; Y Higashi; B Liley; N Nishi; Y Zhao; T Ogawa
  JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES, 108, D3, Dec. 2002, [Peer-reviewed]
  English, Scientific journal
• Springtime photochemical ozone production observed in the upper troposphere over east Asia
  Y Miyazaki; K Kita; Y Kondo; M Koike; M Ko; W Hu; S Kawakami; DR Blake; T Ogawa
  JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES, 108, D3, doi:10.1029/2001JD000811, Nov. 2002, [Peer-reviewed]
  English, Scientific journal
• Photochemical production of ozone in the upper troposphere in association with cumulus convection over Indonesia
  K Kita; S Kawakami; Y Miyazaki; Y Higashi; Y Kondo; N Nishi; M Koike; DR Blake; T Machida; T Sano; W Hu; M Ko; T Ogawa
  JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES, 108, D3, Nov. 2002, [Peer-reviewed]
  English, Scientific journal
• Airborne vacuum ultraviolet resonance fluorescence instrument for in situ measurement of CO
  N. Takegawa; K. Kita; Y. Kondo; Y. Matsumi; D. D. Parrish; J. S. Holloway; M. Koike; Y. Miyazaki; N. Toriyama; S. Kawakami; T. Ogawa
  Journal of Geophysical Research Atmospheres, 106, 20, 24237, 24244, Blackwell Publishing Ltd, 27 Oct. 2001, [Peer-reviewed]
  English, Scientific journal
• Airborne vacuum ultraviolet resonance fluorescence instrument for in situ measurement of CO
  N Takegawa; K Kita; Y Kondo; Y Matsumi; DD Parrish; JS Holloway; M Koike; Y Miyazaki; N Toriyama; S Kawakami; T Ogawa
  JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES, 106, D20, 24237, 24244, Oct. 2001, [Peer-reviewed]
  English, Scientific journal
• Increase of ozone and ozone precursor gases in the upper troposphere over the Indonesian-Northern Australian region observed during BIBLE-A aircraft observation campaign
  K. Kita; Y. Miyazaki; Y. Higashi; S. Kawakami; T. Sano; M. Takeda; N. Nishi; Y. Kondo; M. Koike; D. R. Blake; N. Blake; B. Liley; T. Machida; W. Hu; M. Ko; J. Rodriguez; T. Ogawa
  Proceedings of Quadrennial Ozone Symposium Sapporo 2000, 479-480, 2000
  English, International conference proceedings
• High concentrations of ozone precursors observed in the upper troposphere over East Asia by aircraft measurements in April 1998
  Y. Miyazaki; K. Kita; Y. Kondo; S. Kawakami; T. Machida; D. Blake; N. Nishi; T. Ogawa
  Proceedings of Quadrennial Ozone Symposium Sapporo 2000, 553-554, 2000
  English, International conference proceedings
• Tropospheric ozone over Pacific and Indonesian Region: Relation with ENSO activity and a preliminary report on BIBLE aircraft campaign
  K. Kita; M. Fujiwara; Y. Miyazaki; S. Kawakami; T. Ogawa; N. Komala; S. Saraspriya; Y. Kondo; M. Koike; T. Machida; B. Liley; D. Blake; M. Watanabe; N. Nishi
  Proceedings of International symposium on tropospheric ozone in East Asia and its potential impacts on vegetation, 45-46, 1998
  English, International conference proceedings

• Observation of aerosol number size distribution at two distinct suburban sites: Possible effect of isoprene on new particle formation
  車裕輝; 中山智喜; 松見豊; 鶴丸央; RAMASAMY Sathiramurthi; 坂本陽介; 入江学; 井田明; 加藤俊吾; 宮崎雄三; 望月智貴; 河村公隆; 定永靖宗; 中嶋吉弘; 松田和秀; 梶井克純, エアロゾル科学・技術研究討論会(CD-ROM), 35th, ROMBUNNO.YP25, 2018
  Japanese
• 東京多摩丘陵における実大気へのオゾン添加による二次粒子生成の観測:エアロゾル生成モデル計算との比較
  中山智喜; 車裕輝; 松見豊; 森野悠; 佐藤圭; 鶴丸央; RAMASAMY Sathiyamurthi; 坂本陽介; 加藤俊吾; 宮崎雄三; 望月智貴; 河村公隆; 定永靖宗; 中嶋吉弘; 松田和秀; 梶井克純, エアロゾル科学・技術研究討論会(CD-ROM), 34th, ROMBUNNO.P12, 2017
  Japanese
• 冷温帯林における窒素付加による植生起源二次有機エアロゾル生成への影響
  宮崎雄三; 川上裕美; 竹内友美; 河村公隆; 中路達郎; 日浦勉, 日本地球化学会年会講演要旨集, 62nd, 28, 16 Sep. 2015
  Japanese
• Formation of oxalic acid from biogenic volatile organic compounds in a Larix kaempferi forest
  Mochizuki Tomoki; Miyazaki Yuzo; Kawamura Kimitaka; Ono Kaori; Wada Ryuichi; Takahashi Yoshiyuki; Saigusa Nobuko; Tani Akira, Abstracts of Annual Meeting of the Geochemical Society of Japan, 62, 0, 2015
  低分子ジカルボン酸の中のシュウ酸は有機エアロゾルの主成分の一つであり、これは水溶性が高いことから雲や雨の凝結核となりやすく、地球の放射収支や水循環に影響を及ぼす。本研究は、森林植生から放出されたテルペン類由来のシュウ酸エアロゾルを生成する環境要因を明らかにするため、2012年7月に富士北麓カラマツ林の樹冠直下でテルペン類濃度、シュウ酸濃度、O3濃度、イソプレンとα-ピネンSOAトレーサー濃度を同時に測定した<br><br>イソプレン濃度、シュウ酸濃度、イソプレンとα-ピネンSOAトレーサー濃度は日中に高くなった。シュウ酸濃度はO3濃度、イソプレンとα-ピネンSOAトレーサー濃度と有意な正相関があった。これらの結果より、テルペン類からシュウ酸の生成はサンプリング時間（3時間）内で速やかに進行していることが観測より示唆された。さらに、シュウ酸濃度は硫酸イオン濃度と有意な正の相関があり、テルペン類の酸化によるシュウ酸生成過程においてエアロゾル酸性度の関与が示唆された。, GEOCHEMICAL SOCIETY OF JAPAN, Japanese
• ゼンマイによる塩化メチル放出量の変動とその要因
  横内陽子; 宮崎雄三; 河村公隆; 日浦勉, 日本地球化学会年会講演要旨集, 61st, 20, 2014
  Japanese
• Size distributions of marine biological organic aerosols over the western North Pacific in summer
  宮崎雄三; 河村公隆; 澤野真規, 低温科学, 68, 53, 59, 31 Mar. 2010
  海洋生物生産の活発な時期における海洋大気エアロゾル中の有機物組成と生物起源の寄与を明らかにすることを目的として, 外洋域における有機炭素および有機態窒素の質量粒径分布測定を行った. 本稿では, その結果について解説する. 夏季の西部北太平洋での有機エアロゾルの放出源として海洋生物の影響が大きく, その組成は有機態窒素に富むことが明らかになった. 安定炭素同位体比の分析から, 本研究海域でのエアロゾル全炭素に占める海洋生物起源の割合は46-72%と見積もられた.Size-segregated aerosol samples were collected over the western North Pacific in the summer of 2008 for the measurements of organic nitrogen (ON) and organic carbon (OC). ON and OC showed bimodal size distributions and their concentrations showed positive correlation with those of biogenic tracers, methanesulfonic acid and azelaic acid. We found that average ON and OC concentrations were twice greater in aerosols obtained in the oceanic region with higher biological productivity than with lower biological productivity. The average ON/OC ratios are higher (0.49±0.11) in more biologically influenced aerosols than those (0.35±0.10) in less biologically influenced aerosols. Stable carbon isotopic analysis indicates that marine-derived carbon accounted for ～46-72% of total carbon in more biologically influenced aerosols. These results provide evidence that organic aerosols in this region are enriched in ON that is linked to oceanic biological activity and the subsequent emissions to the atmosphere.大気圏と生物圏の相互利用. 北海道大学低温科学研究所編, 北海道大学低温科学研究所 = Institute of Low Temperature Science, Hokkaido University, Japanese
• 気象ハンドブック(第3版) 「第43章 汚染物質の長距離輸送」
  朝倉書店, 2005
• D304 春季西太平洋域で観測された自由対流圏中での人為起源物質の増大(その3) : PEACE-B航空機観測(物質循環II)
  大島長; 小池真; 中村尚; 近藤豊; 竹川暢之; 宮崎雄三; BlakeD. R; 白井知子; 北和之; 川上修司; 小川利紘, 大会講演予講集, 85, 190, 190, May 2004
  社団法人日本気象学会, Japanese
• MC01:Inter-continental Transport and Global and Regional Impacts of Emissions of Atmospheric Trace Gases and Aerosols from Different Continents(Report on the XXIII General Assembly of the International Union of Geodesy and Geophysics(IUGG2003)(3))
  MIYAZAKI Yuzo; KANAYA Yugo, 天気, 51, 5, 375, 376, 2004
  Japanese
• D362 春季西太平洋域で観測された自由対流圏中での人為起源物質の増大(その2) : PEACE-B航空機観測(物質循環III)
  大島長; 小池真; 近藤豊; 北和之; 竹川暢之; 宮崎雄三; 中村尚; BlakeD. R; 白井知子; 井上修司; 小川利紘, 大会講演予講集, 84, 15 Oct. 2003
  社団法人日本気象学会
• Asian outflow to the Pacific observed during PEACE aircraft campaign in 2002
  M Koike; Y Kondo; N Oshima; N Takegawa; K Kita; H Nakamura; Y Miyazaki; DR Blake; T Shirai; S Kawakami; T Ogawa, GEOCHIMICA ET COSMOCHIMICA ACTA, 67, 18, A227, A227, Sep. 2003
  English, Summary international conference
• Photochemistry of ozone over the Western Pacific in Winter and Spring
  Y Kondo; G Chen; R Hudman; D Jacob; M Koike; K Nakamura; N Takegawa; K Kita; Y Miyazaki; DR Blake; T Shirai; S Kawakami; M Takigawa; H Akimoto; T Ogawa, GEOCHIMICA ET COSMOCHIMICA ACTA, 67, 18, A232, A232, Sep. 2003
  English, Summary international conference
• Short-Term Temporal Variation of PM1 Inorganic Composition Measured in Tokyo
  Miyazaki Yuzo; Kondo Yutaka; Weber Rodney, 大気環境学会年会講演要旨集, 44, 626, 626, 2003
  大気環境学会, Japanese
• Integrated measurements for acrosol chemistry in Tokyo
  Kondo Yutaka; Takegawa Nobuyuki; Koike Makoto; Komazaki Yuichi; Miyazaki Yuzo; Kita Kazuyuki; Kawamura Kimitaka, 大気環境学会年会講演要旨集, 44, 337, 337, 2003
  大気環境学会, Japanese

• 低温科学便覧 (北海道大学低温科学研究所編)
  宮﨑 雄三, 第10章 有機エアロゾル
  丸善出版, 2015, [Contributor]

• 対流圏化学特論, 2024年, 修士課程, 環境科学
• 大気海洋化学基礎論, 2024年, 修士課程, 環境科学院
• 生物地球化学基礎論, 2024年, 修士課程, 環境科学院
• 環境と人間, 2024年, 学士課程, 全学教育

• American Geophysical Union
• 日本エアロゾル学会
• 日本気象学会
• 日本地球惑星科学連合
• 日本大気化学会

• 陸域で生成される超難分解な燃焼起源有機物の海洋への移行および埋没過程の定量評価
  科学研究費助成事業
  01 Apr. 2025 - 31 Mar. 2029
  山下 洋平; 宮崎 雄三; 入野 智久; 野牧 秀隆
  日本学術振興会, 基盤研究(A), 北海道大学, 25H01176
• 北極海洋上で生成する大気有機エアロゾル量・組成変動を制御する海洋微生物因子の解明
  科学研究費助成事業
  Apr. 2026 - Mar. 2029
  宮崎 雄三; 持田 陸宏; 山下 洋平; 深井 悠里
  日本学術振興会, 基盤研究(B), 北海道大学, 26K03054
• Exploring new indicators representing the hygroscopicity of atmospheric organic aerosol
  Grants-in-Aid for Scientific Research
  01 Apr. 2023 - 31 Mar. 2027
  持田 陸宏; 佐藤 圭; 石塚 紳之介; 木村 勇気; 松井 仁志; 宮崎 雄三; 大畑 祥
  Japan Society for the Promotion of Science, Grant-in-Aid for Scientific Research (A), Nagoya University, 23H00515
• 海洋に存在する熱成有機物のミッシングソースの解明
  科学研究費助成事業
  01 Apr. 2022 - 31 Mar. 2026
  山下 洋平; 宮崎 雄三; 入野 智久
  日本学術振興会, 基盤研究(B), 北海道大学, 22H03714
• 亜寒帯海域での大気有機態窒素エアロゾル生成量・組成変動を支配する微生物要因の解明
  日本学術振興会 科学研究費助成事業 基盤研究(B)
  Apr. 2023 - Mar. 2026
  宮﨑 雄三, 鈴木 光次, 山下 洋平
  Principal investigator
• Association analysis between short/long-range diffusion of non-tuberculosis mycobacterium bioaerosols and its infectious disease
  Grants-in-Aid for Scientific Research
  01 Apr. 2020 - 31 Mar. 2024
  能田 淳; 露口 一成; 御手洗 聡; 森本 耕三; 宮崎 雄三; 牧 輝弥
  本研究は、地域ごとの大気環境中のPM2.5の化学的特性及び肺非結核抗酸菌症（肺NTM症）の90%を占めるMAC菌の特異性を把握することと、これら大気環境中の化学成分とMAC菌との相互作用を検証することを目的としている。大気を介したMAC菌感染症の越境の可能性を検証するため、地上付近数十メートルでの測定を全国5拠点（北海道札幌市、東京都清瀬市、石川県珠洲市、大阪府堺市、福岡県福岡市）にて進めている。頻度としては、季節変動の把握を目的として、年4回のサンプリングを季節ごとで進めている。さらに、高高度での拡散条件の把握を行うために、ヘリコプター、航空機などの活用で、隣国などから越境することの可能性も視野に入れつつ観測を進めている。高高度測定については、大阪府、石川県付近など限られた地点での測定ではあるが、地上でのデータとの比較を目指して、できるだけ同時期に測定することを目指す。これらの測定結果で得られたデータを基に、大気中のバイオエアロゾルの挙動を擬似的に検証できる擬似大気チャンバーを用いて、大気中細菌などのバイオエアロゾル活性保持メカニズムの把握、検証を行う。これらの知識構築にて、肺NTM症などの感染が起こりやすい状況をより明確化し、感染症に対応できる生活環境の整備、又は状況の把握か取り組む予防的な対応にて疾病問題の低減化を目ざす。環境因子と関連した感染症対策は知識が不十分であるため、本研究には大きな意義がありこれらの対応を進めていくことは感染症対策として健康維持に向けた重要な取り組みである。
  Japan Society for the Promotion of Science, Grant-in-Aid for Scientific Research (B), Rakuno Gakuen University, 20H04326
• Exploratory research on new source of atmospheric reactive nitrogen focusing on marine nitrogen-fixing organisms
  Grants-in-Aid for Scientific Research
  Jul. 2021 - Mar. 2023
  宮﨑 雄三, 鈴木 光次
  本研究は、海水中で微生物が窒素分子を（栄養塩として利用可能な）反応性窒素へと変換するプロセスである窒素固定に着目し、海洋表層の窒素固定生物が大気反応性窒素の有意な放出源となり得るかを明らかにすることを目的としている。今年度は、人工海水（培地）を用いた窒素固定生物の培養-大気捕集システムの構築と実験条件の最適化を行った。人工海水での窒素固定生物の培養と大気捕集が可能な測定システムを恒温槽内に製作し、大気の吸引による培養容器（水槽）内の圧力変化が細胞増殖に与える影響や容器への負荷を調べた。培養容器約30Lの材質は、光合成のための光を照射するため透明かつ強度が大きく、測定への有機物の干渉がないアクリル製を予備実験により選定した。
  この実験システムを使用し、窒素固定生物の中でトリコデスミウムを用いた室内培養-大気捕集実験を約２カ月間行った。恒温槽内に設置した人工海水中でトリコデスミウムを培養し、インパクタを用いて24時間毎の大気捕集を行った。インパクタにより粒子相と気相（酸性、アルカリ性）の反応性窒素（アンモニア/アンモニウム塩、有機態窒素、硝酸/硝酸塩等）成分を捕集・測定した。人工海水試料は24時間毎に採取し、溶存態窒素や溶存有機炭素濃度、及びクロロフィルa濃度を計算するための細胞内蛍光強度など微生物指標を測定した。約2か月間の培養期間において、トリコデスミウムの増殖期、減衰期を捉えることに成功し、特にアンモニアの大気放出が衰退期において顕著であることが観測された。同時測定したバクテリアの数も減衰期に増加していたことから、トリコデスミウム増殖に伴う滲出物である溶存窒素、溶存態有機炭素の分解が進み、揮発性の高いアンモニア/アンモニウム塩として大気中へ放出が増大したことが示唆された。同様の大気濃度増大は塩基性の有機態窒素（気相）でも観測された。
  Japan Society for the Promotion of Science, Grant-in-Aid for Challenging Research (Exploratory), Hokkaido University, 21K19835
• Deepening the quantitative understanding of the hygroscopicity of atmospheric organic aerosol: Its relationship to chemical structures and sources
  Grants-in-Aid for Scientific Research
  01 Apr. 2019 - 31 Mar. 2022
  Mochida Michihiro
  In this study, the relationships of the hygroscopicity of organic components in atmospheric aerosol samples with the chemical structures and sources were investigated. For urban aerosols, the mass spectral analysis of the extracts from aerosol samples showed the contributions of organics associated with their sources and chemical structure. Further, the relationships of the hygroscopicity of humic-like substances with the oxygen-to-carbon ratios and sources were obtained. For forest aerosols, the atmospheric concentrations of organic fractions were determined based on mass spectral analysis. Based on the hygroscopic growth measurements for particles such as those composed of the mixtures of humic-like substances and ammonium sulfate, results for the assessment of the additivity of hygroscopicity were also obtained.
  Japan Society for the Promotion of Science, Grant-in-Aid for Scientific Research (B), Nagoya University, 19H04253
• 海洋大気の有機態窒素エアロゾル：生成量を制御する海洋微生物活動の支配要因は何か？
  日本学術振興会 科学研究費助成事業 基盤研究(B)
  Apr. 2019 - Mar. 2022
  宮﨑 雄三, 鈴木 光次, 山下 洋平
  Principal investigator, Competitive research funding
• Origin of organic nitrogen aerosol revealed by advanced analysis of nitrogen isotope ratio
  Grants-in-Aid for Scientific Research
  09 Nov. 2018 - 31 Mar. 2021
  宮崎 雄三; XU YU
  本年度は昨年度から引き続き大気エアロゾル中のアミノ酸について、実大気中での代表的な反応過程であるオゾン酸化反応を受けた際の同位体分別効果を調べ、起源トレーサーとしての有用性を検証した。同位体比既知の遊離態アミノ酸標準物質、タンパク質のモデル物質としてのウシ血清アルブミンを添加した石英繊維フィルター、および森林観測サイトで採取した大気エアロゾルフィルター試料(TSP)をそれぞれ大気オゾンに曝露した。これにより、オゾン曝露の前後でアミノ酸の窒素、炭素の安定同位体比が有意に変化するかどうか、すなわちエアロゾル中のアミノ酸がオゾンに伴う反応を受けることによる同位体分別効果の影響を調べた。測定には前年度に確立した、石英繊維フィルターからの溶媒抽出、加水分解や誘導体化等のプロセスの後、ガスクロマトグラフ-質量分析計およびガスクロマトグラフ-同位体比質量分析計に導入し、化合物の質量および安定同位体比を測定する手法を用いた。
  その結果、主要な化合物を含め、ほとんどのアミノ酸化合物の窒素・炭素の安定同位体比について、オゾン曝露の前後で有意な変化は見られず、オゾンに関連する反応による同位体分別は起きていないことが確認できた。植生内で同位体分別が起きないとされる特定のアミノ酸化合物についての過去の文献と本研究による実験結果から、大気でのオゾン酸化反応を経ても、特にグリシンの安定同位体比などが大気中の生物起源トレーサーとして有用であることが初めて示唆された。
  Japan Society for the Promotion of Science, Grant-in-Aid for JSPS Fellows, Hokkaido University, 18F18398
• 植生由来テルペン類から生成する有機態窒素エアロゾルの起源と生成メカニズムの解明
  科研費補助金 基盤研究(B)
  Apr. 2016 - Mar. 2019
  宮崎 雄三, 佐藤 圭, 持田 陸宏
  Principal investigator, Competitive research funding
• Analysis of BVOV emission of white birch and grazing traits by insect herbivore under elevated ozone
  Grants-in-Aid for Scientific Research
  01 Apr. 2016 - 31 Mar. 2018
  Koike Takayoshi
  Ground-level Ozone (O3) decreased defense leaf capacity because of suppression of photosynthesis. We found severe grazing damages of leaf beetle on a crown of White birch at elevated O3. Contrary to this, choice and non-choice style of feeding experiments showed that leaves exposed to elevated O3 were preferred by leaf beetles because of lower defensive chemicals production. To clarify this phenomenon, we suggested possibility of BVOC (Biogenic Volatile Organic Compounds) as signal chemicals for insects to locate their host plants. BVOCs were roughly sorted into two groups: one was monoterpene (MT), the other was sesquiterpene (SQT). MT and SQT had no significant difference in the basic-emission rate regardless of O3 exposure. Therefore, BVOC emission in itself did not work as a factor of changing grazing activity of leaf beetles although the brand ratio of BVOC should be considered. At high O3, we should study BVOC dynamics through reaction with O3 after emitted in the atmosphere.
  Japan Society for the Promotion of Science, Grant-in-Aid for Challenging Exploratory Research, Hokkaido University, 16K14932
• Effect of vertical mixing within the atmospheric boundary layer measured by the marvelous method on clouds, air quality and radiation
  Grants-in-Aid for Scientific Research
  01 Apr. 2014 - 31 Mar. 2017
  Fujiyoshi Yasushi
  Simultaneous ground and in situ observations confirmed the consistent variation of many physical properties in the atmosphere. We also found that strong turbulence near the top of atmospheric boundary layer occurred only in the very narrow region adjacent to small cumulus clouds. We also investigated the spatial and temporal variability of the physical and optical properties of aerosols. We developed a new algorithm to estimate the vertical profiles of the aerosol physical and optical properties. Furthermore, the solar heating rate was estimated from the retrievals, which were directly validated by in situ data collected by a glider. The comparison of the retrieved extinction coefficient with that estimated from in situ measurements showed that our algorithm has a bias error due to the optimization of aerosol parameters to the optical thickness measured by the sky radiometer.
  Japan Society for the Promotion of Science, Grant-in-Aid for Scientific Research (B), Hokkaido University, 26287111
• Hygroscopicity and optical properties of biogenic secondary organic aerosol formed in a forest area
  Grants-in-Aid for Scientific Research
  01 Apr. 2014 - 31 Mar. 2017
  Mochida Michihiro; DENG Yange; OGAWA Shuhei; KAGAMI Sara; YAI Hikari; KAWANA Kaori; KUBODERA Ryo; TACHIBANA Eri
  Field observations of the hygroscopicity and optical properties of atmospheric aerosol were conducted in a forest area of the Kii Peninsula. Hygroscopicity parameters of organic aerosol and biogenic secondary organic aerosol were calculated based on measurements of cloud condensation nuclei. The contributions of organic aerosol and biogenic secondary organic aerosol to the number concentrations of cloud condensation nuclei were assessed. Further, the coatings of black carbon particles were analyzed based on light absorption measurements of the aerosol with and without heating. The hygroscopic growth factors of aerosol particles, the concentrations of tracer species of biogenic secondary organic aerosol, and sky-radiometer data were also obtained. Results and data from this study are expected to be the basis for further characterization of forest aerosols.
  Japan Society for the Promotion of Science, Grant-in-Aid for Scientific Research (B), Nagoya University, 26281007
• Composition, origin, transformation and hygroscopic properties of organic aerosols in East Asia and the North Pacific
  Grants-in-Aid for Scientific Research
  31 May 2012 - 31 Mar. 2017
  KAWAMURA Kimitaka
  In this project, we studied chemical compositions of atmospheric aerosols from East Asia and its outflow regions in the western North Pacific at levels of carbon, nitrogen, organic molecules including carboxylic acids, isotopes and inorganic ions. We found a decline of sulfate concentrations after 2006 due to the sulfur emission control in China, but organic aerosols showed a continuous increase from 2001 to 2013. This increase of organics is largely involved with the emissions of biomass burning of agriculture wastes such as wheat straw in China and other Asian countries. Those trends are consistent with an increase in the biomass-burning tracers such as levoglucosan in the marine aerosols.
  Hygroscopic properties of aerosol particles were measured for remote marine aerosols. We found that growth factors of marine aerosols are decreased when Asian dusts (Kosa) are transported over the ocean due to the formation of water-insoluble calcium oxalate in spring.
  Japan Society for the Promotion of Science, Grant-in-Aid for Scientific Research (S), 24221001
• 含窒素有機物組成と同位体比測定による有機態窒素エアロゾルの起源の解明
  科研費補助金 基盤研究(B)
  Apr. 2013 - Mar. 2016
  宮﨑 雄三
  Principal investigator, Competitive research funding
• 海洋微生物に由来する大気微粒子ゲル状有機物に含まれるペプチド検出の試み
  科研費補助金 挑戦的萌芽研究
  2013 - 2014
  宮﨑 雄三
  Principal investigator, Competitive research funding
• 複合トレーサーを用いた森林土壌への窒素負荷に伴う大気エアロゾル生成への影響の解明
  2012 - 2013
  宮﨑 雄三
  Principal investigator, Competitive research funding
• 森林生態系でのCO2固定に対する炭素性微小粒子生成への応答と制御要因の解明
  2011 - 2012
  宮﨑 雄三
  Principal investigator, Competitive research funding
• Studies of impacts of black carbon aerosol on climate based on aircraft observations
  Grants-in-Aid for Scientific Research
  2007 - 2011
  KONDO Yutaka; KOIKE Makoto; TAKEKAWA Nobuyuki; TAKEMURA Toshihiko; MIYAZAKI Yuzo
  We have developed a black carbon(BC) instrument. Using the BC instrument, aircraft campaigns have been conducted over the western Pacific and the Arctic. We measured various microphysical properties of BC aerosol(e. g., mass concentration, size distribution, mixing state) and showed spatial and temporal distribution, large-scale transport, transformation, and removal processes of BC. We also developed global and regional models that can represent the detailed BC microphysical properties. Model calculations were validated by measurements. Using these models, impact of BC on the Earth's climate has been evaluated quantitatively.
  Japan Society for the Promotion of Science, Grant-in-Aid for Scientific Research (S), The University of Tokyo, 19101001
• 北方森林生態系における植生起源有機エアロゾル生成の観測研究
  2010 - 2010
  宮﨑 雄三
  Principal investigator, Competitive research funding
• 大気中の揮発性・半揮発性有機酸の測定とエアロゾル生成・変質・吸湿特性への寄与
  科学研究費助成事業
  2009 - 2010
  河村 公隆; 宮崎 雄三
  夏季の西部北太平洋において白鳳丸航海(KH08-02)で採取した降水・霧水試料中に低分子有機酸を測定した。測定には、河村らが開発したフィナシルエステル・GC法(Kawamura et al.,1985)の改良版を用いた。試料を、0.1M KOH水溶液にてpH=8.5に調製したのち、ロータリーエバポレーターを用いて濃縮する。濃縮液を陽イオン交換樹脂に通すことによりすべての有機酸をRCOO^-K^+の化学形にする。次に、溶離液を濃縮・乾燥後、誘導体試薬(α,p-ジブロモアセトフェノン)と触媒(クラウンエーテル:dicyclohexyl-18-crown)を加え、アセトニトリル溶媒中で80℃,2時間反応させ、カルボン酸をp-ブロモフィナシルエステルに誘導体化した。有機酸エステルをシリカゲルカラムにより精製した後、ヒドロキシ有機酸のOH基をBSTFAによりTMS化した。札幌および西部北太平洋で採取した試料から分離した有機酸エステルをキャピラリーGCにて測定した結果、C_1-C_<10>直鎖、側鎖および芳香族の有機酸を検出した。更に、乳酸、グリコール酸(ヒドロキシ有機酸)を検出し、それぞれを定量した。また、GC/MSを用いて化合物の同定を行った。
  西部北太平洋上の降水・霧水中において初めて低分子モノカルボン酸(C_1-C_7、乳酸、グリコール酸、3-ヒドロキシブタン酸)を検出した。降水中(4試料)のギ酸(C1)の濃度は4-725ng/g、酢酸(C2)では30-238ng/g、プロピオン酸(C3)では12-12.5ng/g、ブタン酸(C4)では0.1-5.1ng/g、イソブタン酸(iC4)では0.1-2.7ng/g,Valeic acid(C5)では0.0-1.9ng/g,Isovaleic acid(iC5)では0.0-0.9ng/g,Caproic acid(C6)では0.0-5.3ng/g,乳酸では0-153ng/g,Glycolic acidでは0-32ng/g,3-Hydroxybutanoic acidでは0.1-13ng/gであった。ギ酸・酢酸の濃度は、西部北太平洋で採取した降水中(MROO-K02,2000)のシュウ酸濃度よりも高い傾向にあることが明らかとなり、低分子モノカルボン酸は重要な有機物であることがわかった。一方、霧水試料(n=9)についても測定した結果、ギ酸・酢酸が優位であることがわかった。濃度は、ギ酸で63-360ng/g,酢酸で35-303ng/gであり、雨に比べて著しく高いわけではなかった。また、ヒドロキシカルボン酸も検出された。一つの試料中で乳酸の濃度はギ酸・酢酸よりも高かった。
  現在、乳酸の吸湿特性(Growth factor)を測定するため、H-TDMAの調整をしている。
  日本学術振興会, 挑戦的萌芽研究, 北海道大学, 21654079
• 大気中における含窒素有機エアロゾルの化学的挙動の解明
  2009 - 2010
  宮﨑 雄三
  Principal investigator, Competitive research funding
• Chemical compositions, spatial distributions and hygroscopic properties of organic aerosols from East and South Asia
  Grants-in-Aid for Scientific Research
  2007 - 2010
  KAWAMURA Kimitaka; MOCHIDA Michihiro; MIYAZAKI Yuzo; SEKI Osamu
  Atmospheric aerosols, collected from China, Korea, Mongolia, India and Japan as well as coastal and remote islands, have been studied for organic chemical compositions. The aerosols from Manshan, 40 km north of Beijing, showed higher concentrations of dicarboxylic acids such as oxalic acid than those from Beijing, suggesting a secondary (photochemical) production of water-soluble organic acids during atmospheric transport. Indian aerosols from New Delhi showed very high concentrations of low molecular weight diacids. Aerosols from Ulaanbaatar were studied for the hygroscopicity, indicating that the growth factor (Gf=1.22) is close to that of biomass burning aerosols.
  Japan Society for the Promotion of Science, Grant-in-Aid for Scientific Research (A), Hokkaido University, 19204055
• A study on formation and removal processes of organic aerosol in Asia using an advanced mass spectrometry
  Grants-in-Aid for Scientific Research
  2007 - 2008
  TAKEGAWA Nobuyuki; KONDO Yutaka; KOIKE Makoto; MIYAZAKI Yuzo
  エアロゾル質量分析計(AMS)により得られたアジアの大都市(東京、広州、北京)におけるデータの解析とそれに関連する実験を行った。AMS の質量スペクトルや粒径分布から有機エアロゾルに関する多くの情報を引き出す方法を考案し、これに基づいてアジアの無機・有機エアロゾルの生成・消滅過程の研究を行った。夏季の北京において無機・有機エアロゾルが領域スケールで多量に生成され、それらが低気圧の通過に伴って広域へ輸送されていることが明らかになった。
  Japan Society for the Promotion of Science, Grant-in-Aid for Scientific Research (B), The University of Tokyo, 19310005
• 大気中における水溶性フミン状有機エアロゾルの高速自動測定法の開発
  2007 - 2008
  宮﨑 雄三
  Principal investigator, Competitive research funding
• Studies on Size Distribution and Mixing State of Black Carbon Aerosols in China
  Grants-in-Aid for Scientific Research
  2006 - 2007
  KOIKE Makoto; TAKEGAWA Nobuyki; MIYAZAKI Yuzo; KITA Kazuyuki
  Recent rapid growth of industrial activities in East Asia has been causing large increase in aerosols in this area. Atmospheric aerosols modify the radiation budget through scattering and absorption. Because black carbon (BC) aerosols (e.g., soot) efficiently absorb the solar radiation, they have been recognized one of the most important aerosol compounds the solar radiation, they have been recognized one of the mot important aerosol compounds for climate change.
  In the physical year of 2006, measurements of BC mass concentrations, size distribution, and mixing sate were in the Beijing region and Peal River Delta (PRD) region in China with Peking University Research Groups and some other international research groups. Aerosol chemical composition and some other parameters were also simultaneously measured.
  In the physical year of 2007, these data were precisely analyzed and interpreted from the viewpoint of emission sources, chemical production, transport processes, and removal processes using three-dimensional chemistry transport model. Observations show that BC concentrations in Beijing have a clear diurnal variation with a maximum during night. This feature was well reproduced by model calculations through diurnal variations, such as that in the boundary layer height. Although large day-to-day variations were found for secondary aerosols, such as inorganic aerosols, they were small for BC. Model calculations showed that BC concentrations were generally controlled by BC emissions within 100 km around Beijing within previous 24 hours. On the centrally, emissions as far as 500 km within previous 3 days were found to affect concentrations of secondary aerosols, such as sulfate through accumulations under stable synoptic-scale meteorological conditions.
  Japan Society for the Promotion of Science, Grant-in-Aid for Scientific Research (B), The University of Tokyo, 18310007
• A study on formation process of anthropogenic organic aerosol using a highly advanced mass spectrometer
  Grants-in-Aid for Scientific Research
  2005 - 2006
  TAKEGAWA Nobuyuki; KONDO Yutaka; KOMAZAKI Yuichi; KOIKE Makoto; MIYAZAKI Yuzo
  1. Improvement of the accuracy of the Aerosol Mass Spectrometer (AMS)
  The particle collection efficiency (CE) of the AMS depends on relative humidity (RH) in sample air. The temperature of the AMS inlet manifold was maintained at > 10℃ above the ambient dew point to dry particles in the sample air (RH in the inlet < 53%). Assuming CE = 0.5 for the AMS, the mass concentrations of inorganic species (nitrate, sulfate, chloride, and ammonium) measured by the AMS agree with those measured by an Ion Chromatography analyzer (PILS-IC) to within 〜20%.
  2. Analysis of the mass spectra of selected organic compounds
  We have evaluated the contribution of selected low molecular weight dicarboxylic acids (diacids) to the m/z 44 signal of the AMS mass spectrum. We used ambient measurement data obtained in Tokyo and laboratory experiment data obtained using authentic standards of the selected organic acids. We have reported for the first time that the selected organic acids could account for 14% of the observed m/z 44 signal on average during the measurement period.
  3. Investigation of the seasonal and diurnal variations of anthropogenic organic aerosol in Tokyo
  In situ measurements of trace gases and aerosols were conducted at an urban site in Tokyo. Organic aerosol (OA) is classified into primary organic aerosol (POA) and secondary organic aerosol (SOA) using correlation with carbon monoxide (CO). We have found that POA does not exhibit a distinct diurnal variation for the summer, fall, and winter periods, while SOA shows a clear diurnal pattern. We have also found that the OA concentrations can be significantly enhanced within 〜0.5 days under conditions of high photochemical activity.
  Japan Society for the Promotion of Science, Grant-in-Aid for Scientific Research (B), The University of Tokyo, 17310006
• Studies on physical-chemical processes of aerosol-cloud interaction
  Grants-in-Aid for Scientific Research
  2005 - 2006
  KONDO Yutaka; TAKEGAWA Nobuyuki; MIYAZAKI Yuzo; KOIKE Makoto
  Cloud condensation nuclei (CCN) activity is determined by aerosol diameter, fraction of water soluble components, and surface tension. We quantified CCN activities as a function of these parameters and related them with cloud formation processes.
  A)Controlling factors of CCN activities of aerosol in urban air
  We measured chemical composition, mixing states, and CCN activity of aerosol in Tokyo using an aerosol mass spectrometer, black carbon (BC) instruments, and a CCN counter. We found that CCN activity of thickly coated BC is controlled by the chemical composition of water soluble compounds. The CCN activity of thinly coated BC is controlled by the thickness of the coating.
  B)Measurements of aerosol-cloud interaction
  We conducted aircraft measurements of aerosol and cloud particles inside and outside of clouds located at 1-2 km near Japan in spring. We showed that thickly coated BC particles were taken up into clouds efficiently, consistent with the ground based measurements. This also shows that BC can be a good tracer to quantitatively study aerosol-cloud interaction.
  C)Time constant of CCN formation
  We showed that CCN activity of aerosol transported from the Asian continent within a few days is controlled mainly by the fraction of water soluble components from the data obtained in Jeju Island, Korea. Decrease in the surface tension of organic aerosol is also estimated to is contribute to the CCN activity. The CCN activity of various types of aerosol was measured also near Beijing. The observed CCN activity is consistent with the understandings obtained in Tokyo and Jeju Is.
  D)Calibration of the cloud probe and its aerodynamical characteristics
  Light scattering cloud probe was calibrated using standard particles with high precision. We made aerodynamical calculations of airflows around the probe mounted on the aircraft and found high collection efficiency of cloud droplets.
  E)We calculated size distribution of cloud droplets predicted from various CCN concentrations using a trajectory model. Sensitivity of CCN-cloud interaction was estimated by the numerical experiments.
  Japan Society for the Promotion of Science, Grant-in-Aid for Scientific Research (A), The University of Tokyo, 17201003
• 水溶性有機エアロゾルの高感度実時間連続測定法の開発
  2005 - 2006
  宮﨑 雄三
  Principal investigator, Competitive research funding
• Temporal variation of nano-particle, elemental carbon and organic carbon in the urban atmosphere
  Grants-in-Aid for Scientific Research
  2004 - 2005
  KOMAZAKI Yuichi; KONDO Yutaka; TAKEGAWA Nobuyuki; KOIKE Makoto
  EC comprises a significant portion of nano-particles, which are harmful to human health. EC has also been identified as making important contributions to the radiative heating of the atmosphere. Mass concentrations of EC in fine mode and CO were measured in Tokyo. EC were measured using a semi-continuous thermal-optical analyzer. The mass concentrations of non-volatile fine-particle measured by the calibrated SMPS combined with a heated inlet agreed with the independent EC measurements, demonstrating that the mass concentrations of non-volatile particle well those for EC. EC mass concentration was in volume equivalent diameters between 50-200 nm, peaking at around 130 nm. The correlation of EC and CO was generally compact throughout the measurement period. The slope of the EC-CO correlation (ΔEC/ΔCO) is therefore a useful parameter in validating EC emission inventories. The EC concentration and ΔEC/ΔCO showed distinct diurnal variation. On weekdays, EC and ΔEC/ΔCO reached maximum values, respectively, in the early morning, when the traffic density of heavy-duty trucks with diesel engines was highest. In addition, these values were lower by a factor of 2 on Sundays. The heavy truck traffic showed similar diurnal and weekday/weekend variations, indicating that exhaust from diesel engines is an important source of EC. Monthly mean ΔEC/ΔCO showed a seasonal variation, reaching broad maximum values in spring-autumn and reaching minimum values in midwinter. More stringent regulation of emissions of particles from diesel cars started in the Tokyo metropolitan area in October 2003. The ΔEC/ΔCO values did not change significantly (10%) after one year from the start of the new regulations, when the temperature dependence is taken into account. This indicates that the regulation of particle emissions in the Tokyo Metropolitan Area was not effective in reducing the EC concentrations after one year.
  Japan Society for the Promotion of Science, Grant-in-Aid for Scientific Research (B), The University of Tokyo, 16310003
• 東アジア大陸における元素状炭素および有機炭素の動態の解明
  科学研究費助成事業
  2004 - 2005
  近藤 豊; 小池 真; 宮崎 雄三
  元素状炭素(EC、あるいはブラックカーボン)は、高濃度になる地域では人体に悪影響を及ぼす。さらに太陽光の吸収が強いため大気の放射収支にも重要な影響を与える。本研究では都市域においてECの長期観測を行い、COをトレーサーとして用いることでECの排出源と大気中での挙動(季節変化、日変化、粒径分布)やそれらを支配する要因を明らかにした。このために高い時間分解能(1時間)と測定精度を持つ熱・光学方式によるEC計、及び大気導入部を加熱したScanning Mobility Particle Sizer(SMPS)(不揮発性粒子を選択的に測定)を用いて観測を行った。観測は代表的なメガシティーである東京都市域において通年(2003年5月ー2005年2月)で行ってきた。
  SMPSにより測定された不揮発性粒子の質量濃度とEC分析装置によるEC質量濃度は10%の範囲内で良く一致し、不揮発性粒子の質量濃度はEC質量濃度を代表することが示された。また、EC質量濃度の大部分は体積等価粒径130nm付近にピークを持つことがわかった。ECとCOは良い相関(R^2=0.62)を示し、類似の排出源を持つことが示唆された。観測全期間のEC、COの中央値はそれぞれ1.8±1.8μgm^<-3>、368±274ppbvであった。また、ディーゼル車からの排出が卓越する早朝のΔEC/ΔCO比は7.2±2.6×10^<-3>ngm^<-3>/ppbvと変動は小さい。ΔEC1ΔCO比は気温の季節変化に対応し春-秋に最大値を示した。東京都におけるEC排出の規制開始(2003年10月)後1年で東京都での粒子排出規制後1年でΔEC/ΔCO比に自然変動(10%)以上の変化は見られなかった。
  日本学術振興会, 特定領域研究, 東京大学, 16030203
• 大気中における極性有機エアロゾルの挙動・起源の解明
  2004
  Competitive research funding