Researcher Database

KURAMOTO Kiyoshi
Faculty of Science Earth and Planetary Sciences Cosmosciences
Professor

Researcher Profile and Settings

Affiliation

  • Faculty of Science Earth and Planetary Sciences Cosmosciences

Job Title

    Professor

URL

Research Interests

  • Planets   Earth   Origin   Evolution   Structure   Phenomena   System   Planets   Earth   Origin   Evolution   Structure   Phenomena   System   Planets   Earth   Origin   Evolution   Structure   Phenomena   System   

Research Areas

  • Earth and planetary science / Solid earth and planetary physics
  • Earth and planetary science / Meteorology/Physical oceanography/Hydrology
  • Earth and planetary science / Petrology/Mineralogy/Science of ore deposit
  • Earth and planetary science / Geochemistry/Astrochemistry
  • Astronomy / Astronomy

Academic & Professional Experience

  • 2015/04 - Today    Hokkaido UniversityDivision of Earth and Planetary Sciences, Faculty of ScienceProfessor
  • 2007/04 - 2015/03    Hokkaido UniversityDivision of Natural History Sciences, Faculty of ScienceProfessor
  • 2006/04 - 2007/03    Hokkaido UniversityDivision of Natural History Sciences, Faculty of ScienceAssociate Professor
  • 2001/04 - 2006/03    Hokkaido UniversityDepartment of Earth and Planetary Sciences, Graduate Scool of ScienceGraduate School of ScienceAssociate Professor
  • 1998/11 - 2001/03    Hokkaido UniveristyDepartment of Earth and Plantary Sciences, Graduate School of ScienceResearch Associate
  • 1997/04 - 1998/10    Hokkaido UniversityInstitute of Low Temperature SciencesPost doctoral fellowships of JSPS
  • 1995/09 - 1997/03    University of TokyoCenter for Climate System ResearchCOE researcher
  • 1994/08 - 1995/08    Tokyo Institute of TechnologyUndergraduate School of ScienceTechnical Assistant

Education

  •        - 1991  The University of Tokyo  Graduate School, Division of Science
  •        - 1994  The University of Tokyo  Graduate School, Division of Science
  •        - 1989  The University of Tokyo  Faculty of Science

Research Activities

Published Papers

  • Takashi Ito, Masateru Ishiguro, Tomoko Arai, Masataka Imai, Tomohiko Sekiguchi, Yoonsoo P. Bach, Yuna G. Kwon, Masanori Kobayashi, Ryo Ishimaru, Hiroyuki Naito, Makoto Watanabe & Kiyoshi Kuramoto
    ature Communications 9 (2486) 2018/06 [Refereed][Not invited]
     Research paper (scientific journal)
  • Daisuke Kuroda, Masateru Ishiguro, Makoto Watanabe, Sunao Hasegawa, Tomohiko Sekiguchi, Hiroyuki Naito, Fumihiko Usui, Masataka Imai, Mitsuteru Sato, Kiyoshi Kuramoto
    Astronomy & Astrophysics 0004-6361 2017/11 [Refereed][Not invited]
  • Ishiguro Masateru, Kuroda Daisuke, Watanabe Makoto, Bach Yoonsoo P., Kim Jooyeon, Lee Mingyeong, Sekiguchi Tomohiko, Naito Hiroyuki, Ohtsuka Katsuhito, Hanayama Hidekazu, Hasegawa Sunao, Usui Fumihiko, Urakawa Seitaro, Imai Masataka, Sato Mitsuteru, Kuramoto Kiyoshi
    ASTRONOMICAL JOURNAL 154 (5) 0004-6256 2017/11 [Refereed][Not invited]
  • S. Noda, M. Ishiwatari, M. Ishiwatari, K. Nakajima, Y. O. Takahashi, Y. O. Takahashi, S. Takehiro, M. Onishi, G. L. Hashimoto, K. Kuramoto, Y. Y. Hayashi,
    Icarus 282 1 - 18 00191035 2017/01 [Not refereed][Not invited]
     
    © 2016 The Authors In order to investigate a possible variety of atmospheric states realized on a synchronously rotating aquaplanet, an experiment studying the impact of planetary rotation rate is performed using an atmospheric general circulation model (GCM) with simplified hydrological and radiative processes. The entire planetary surface is covered with a swamp ocean. The value of planetary rotation rate is varied from zero to the Earth's, while other parameters such as planetary radius, mean molecular weight and total mass of atmospheric dry components, and solar constant are set to the present Earth's values. The integration results show that the atmosphere reaches statistically equilibrium states for all runs; none of the calculated cases exemplifies the runaway greenhouse state. The circulation patterns obtained are classified into four types: Type-I characterized by the dominance of a day-night thermally direct circulation, Type-II characterized by a zonal wave number one resonant Rossby wave over a meridionally broad westerly jet on the equator, Type-III characterized by a long time scale north-south asymmetric variation, and Type-IV characterized by a pair of mid-latitude westerly jets. With the increase of planetary rotation rate, the circulation evolves from Type-I to Type-II and then to Type-III gradually and smoothly, whereas the change from Ty pe-III to Type-IV is abrupt and discontinuous. Over a finite range of planetary rotation rate, both Types-III and -IV emerge as statistically steady states, constituting multiple equilibria. In spite of the substantial changes in circulation, the net energy transport from the day side to the night side remains almost insensitive to planetary rotation rate, although the partition into dry static energy and latent heat energy transports changes. The reason for this notable insensitivity is that the outgoing longwave radiation over the broad area of the day side is constrained by the radiation limit of a moist atmosphere, so that the transport to the night side, which is determined as the difference between the incoming solar radiation and the radiation limit, cannot change greatly.
  • Hiroaki Saito, Kiyoshi Kuramoto
    Monthly Notices of the Royal Astronomical Society 475 (1) 1274  0035-8711 2018 [Refereed][Not invited]
  • Kamata Shunichi, Kimura Jun, Matsumoto Koji, Nimmo Francis, Kuramoto Kiyoshi, Namiki Noriyuki
    JOURNAL OF GEOPHYSICAL RESEARCH-PLANETS 121 (7) 1362 - 1375 2169-9097 2016/07 [Refereed][Not invited]
  • Iryu Yasufumi, Kuramoto Kiyoshi, Satoh Masaki, Matsumoto Jun, Yoshioka Shoichi, Kawahata Hodaka, Tada Ryuji
    PROGRESS IN EARTH AND PLANETARY SCIENCE 3 2197-4284 2016/01 [Refereed][Not invited]
  • Kamata Shunichi, Sugita Seiji, Abe Yutaka, Ishihara Yoshiaki, Harada Yuji, Morota Tomokatsu, Namiki Noriyuki, Iwata Takahiro, Hanada Hideo, Araki Hiroshi, Matsumoto Koji, Tajika Eiichi, Kuramoto Kiyoshi, Nimmo Francis
    ICARUS 250 492 - 503 0019-1035 2015/04 [Refereed][Not invited]
  • K. Tsumura, K. Tsumura, K. Arimatsu, K. Arimatsu, E. Egami, Y. Hayano, C. Honda, J. Kimura, K. Kuramoto, S. Matsuura, Y. Minowa, K. Nakajima, T. Nakamoto, M. Shirahata, M. Shirahata, J. Surace, Y. Takahashi, T. Wada
    Astrophysical Journal 789 0004637X 2014/07 [Not refereed][Not invited]
     
    Based on observations from the Hubble Space Telescope and the Subaru Telescope, we have discovered that Europa, Ganymede, and Callisto are bright around 1.5 μm even when not directly lit by sunlight. The observations were conducted with non-sidereal tracking on Jupiter outside of the field of view to reduce the stray light subtraction uncertainty due to the close proximity of Jupiter. Their eclipsed luminosity was 10 -6 -10 -7 of their uneclipsed brightness, which is low enough that this phenomenon has been undiscovered until now. In addition, Europa in eclipse was < 1/10 of the others at 1.5 μm, a potential clue to the origin of the source of luminosity. Likewise, Ganymede observations were attempted at 3.6 μm by the Spitzer Space Telesc ope, but it was not detected, suggesting a significant wavelength dependence. It is still unknown why they are luminous even when in the Jovian shadow, but forward-scattered sunlight by hazes in the Jovian upper atmosphere is proposed as the most plausible candidate. If this is the case, observations of these Galilean satellites while eclipsed by the Jovian shadow provide us with a new technique to investigate the Jovian atmospheric composition. Investigating the transmission spectrum of Jupiter by this method is important for investigating the atmosphere of extrasolar giant planets by transit spectroscopy. © 2014. The American Astronomical Society. All rights reserved.
  • K. Sugiyama, K. Sugiyama, K. Sugiyama, K. Nakajima, M. Odaka, K. Kuramoto, K. Kuramoto, Y. Y. Hayashi, Y. Y. Hayashi
    Icarus 231 407 - 408 00191035 2014/03 [Not refereed][Not invited]
  • K. Sugiyama, K. Sugiyama, K. Nakajima, M. Odaka, K. Kuramoto, K. Kuramoto, Y. Y. Hayashi, Y. Y. Hayashi
    Icarus 229 71 - 91 00191035 2014/02 [Not refereed][Not invited]
     
    A series of long-term numerical simulations of moist convection in Jupiter's atmosphere is performed in order to investigate the idealized characteristics of the vertical structure of multi-composition clouds and the convective motions associated with them, varying the deep abundances of condensable gases and the autoconversion time scale, the latter being one of the most questionable parameters in cloud microphysical parameterization. The simulations are conducted using a two-dimensional cloud resolving model that explicitly represents the convective motion and microphysics of the three cloud components, H 2 O, NH 3 , and NH 4 SH imposing a body cooling that substitutes the net radiative cooling. The results are qualitatively similar to those reported in Sugiyama et al. (Sugiyama, K. et al. [2011]. Intermittent cumulonimbus activity breaking the three-layer cloud structure of Jupiter. Geophys. Res. Lett. 38, L13201. doi:10.1029/2011GL047878): stable layers associated with condensation and chemical reaction act as effective dynamical and compositional boundaries, intense cumulonimbus clouds develop with distinct temporal intermittency, and the active transport associated with these clouds results in the establishment of mean vertical profiles of condensates and condensable gases that are distinctly different from the hitherto accepted three-layered structure (e.g., Atreya, S.K., Romani, P.N. [1985] . Photochemistry and clouds of Jupiter, Saturn and Uranus. In: Recent Advances in Planetary Meteorology. Cambridge Univ. Press, London, pp. 17-68). Our results also demonstrate that the period of intermittent cloud activity is roughly proportional to the deep abundance of H 2 O gas. The autoconversion time scale does not strongly affect the results, except for the vertical profiles of the condensates. Changing the autoconversion time scale by a factor of 100 changes the intermittency period by a factor of less than two, although it causes a dramatic increase in the amount of condensates in the upper troposphere. The moist convection layer becomes potentially unstable with respect to an air parcel rising from below the H 2 O lifting condensation level (LCL) well before the development of cumulonimbus clouds. The instability accumulates until an appropriate trigger is provided by the H 2 O condensate that falls down through the H 2 O LCL; the H 2 O condensate drives a downward flow below the H 2 O LCL as a result of the latent cooling associated with the re-evaporation of the condensate, and the returning updrafts carry moist air from below to the moist convection layer. Active cloud development is terminated when the instability is completely exhausted. The period of intermittency is roughly equal to the time obtained by dividing the mean temperature increase, which is caused by active cumulonimbus development, by the body cooling rate. © 2013 Elsevier Inc.
  • KURAMOTO Kiyoshi, UMEMOTO Takafumi, and Ishiwatari Masaki
    Earth and Planetary Science Letters 375 312 - 318 0012-821X 2013/08 [Refereed][Not invited]
     Research paper (scientific journal)
  • K. Sugiyama, A. Suzuki, J. Takahashi, T. Nakamura, S. Manabe, and 12 authors
    Planetary People 21 (4) 368 - 376 0918-273X 2012/12 [Refereed][Not invited]
  • Y. Sekine, Y. Takano, H. Yano and 9 authors
    Planetary People 21 (3) 229 - 238 0918-273X 2012/09 [Refereed][Not invited]
  • K. Sugiyama, K. Nakajima, M. Odaka, M. Ishiwatari, K. Kuramoto, Y. O. Takahashi, and Y.-Y. Hayashi
    Planetary People 21 (1) 39 - 44 2012/03 [Refereed][Not invited]
  • Sasaki, Y., Takehiro, S., Hayashi, Y-Y., Kuramoto, K
    Physics of Earth and Planeary Interiors 188 (3) 203 - 213 0031-9201 2011/10 [Refereed][Not invited]
  • Kimura Jun, Kawamura Taichi, Morito Hisataka, Morota Tomokatsu, Honda Chikatoshi, Kuramoto Kiyoshi, Okada Tatsuaki
    ICARUS 214 (2) 596 - 605 0019-1035 2011/08 [Refereed][Not invited]
  • Planetary People 18 (2) 76 - 78 0918273X 2009/06 [Not refereed][Not invited]
  • Planetary People 17 (2) 123 - 129 0918273X 2008/06 [Not refereed][Not invited]
  • Oxygen isotopic evolution in the early solar nebula: Validation of the H2O transport model
    Fukui Takashi, Kuramoto Kiyoshi
    ORIGIN OF MATTER AND EVOLUTION OF GALAXIES 1016 409 - 411 0094-243X 2008 [Refereed][Not invited]
  • Kuramoto Kiyoshi, Genda Hidenori, Arai Tomoko, Okada Tatsuaki, Sugita Seiji
    Planetary People Planetary People 16 (3) 197 - 207 0918273X 2007/09 [Not refereed][Not invited]
  • Sakamoto N, Seto Y, Itoh S, Kuramoto K, Fujino K, Nagashima K, Krot AN, Yurimoto H
    Science (New York, N.Y.) 317 (5835) 231 - 233 0036-8075 2007/07 [Refereed][Not invited]
  • Kuramoto Kiyoshi, Yurimoto Hisayoshi
    Planetary People Planetary People 14 (4) 193 - 200 0918273X 2005/12 [Not refereed][Not invited]
  • Yurimoto H, Kuramoto K
    Science (New York, N.Y.) 305 1763 - 1766 0036-8075 2004/09 [Refereed][Not invited]
  • Nakagami Yuuichi, Ohshima Osamu, Sugiyama Ko-ichiro, Kawabata Yoshihito, Sato Koichiro, Kobayashi Kazumasa, Sasagawa Hirotatsu, Odaka Msatusgu, Kuramoto Kiyoshi, Mosir project Mosir project
    Planetary People Planetary People 12 (2) 80 - 88 0918273X 2003/06 [Not refereed][Not invited]
  • YOKOHATA, KURAMOTO Kiyoshi
    Planetary People Planetary People 10 (2) 64 - 74 0918273X 2001/06 [Not refereed][Not invited]
  • SENSHU Hiroki, KURAMOTO Kiyoshi, MATSUI Takafumi
    Planetary People Planetary People 9 (1) 17 - 32 0918273X 2000/03 [Not refereed][Not invited]
  • KURAMOTO Kei
    Planetary People Planetary People 6 (3) 196 - 198 0918273X 1997/09 [Not refereed][Not invited]
  • KURAMOTO Kiyoshi
    Planetary People Planetary People 4 (4) 201 - 214 0918273X 1995/12 [Not refereed][Not invited]
  • Global material transport in the solar nebula controlled by ice component
    Low Temperature Science 66 83 - 88 2008 [Not refereed][Not invited]
  • Climate changes on Mars: CO2 polar cap and H2O ice sheet
    10 64 - 74 2001 [Not refereed][Not invited]
  • Early thermal history of a proto-planet
    9 17 - 32 2000 [Not refereed][Not invited]
  • The ocean in Europa
    47 39 - 40 2000 [Not refereed][Not invited]
  • Feasibility of exploration of lunar iron core
    7 218 - 220 1998 [Not refereed][Not invited]
  • Special issue, Origin and evolution of the Moon
    6 196 - 198 1997 [Not refereed][Not invited]
  • Earth and Mars: H, C, and early differentiation
    4 201 - 214 1995 [Not refereed][Not invited]

MISC

Awards & Honors

  • 2005   2005, Horiuchi Prize, Meteorological Society of Japan
       japan

Research Grants & Projects

  • Ministry of Education, Culture, Sports, Science and Technology:Grants-in-Aid for Scientific Research(基盤研究(C))
    Date (from‐to) : 2007 -2009 
    Author : Kiyoshi KURAMOTO
     
    北海道大学The bulk composition of Mercury estimated from a model for the solar nebula evolution is adopted for the numerical and theoretical analysis of the thermal history and dynamo action of this innermost planet. The mantle components are probably more viscous than the previous estimates, which slows down the growth of solid inner core. The release of light element from the slowly growing inner core possibly induces the convection of outer liquid core with generating a moderate dynamo action and the present weak intrinsic magnetic field. These results provide a basis for the interpretation of dat...
  • Formation and evolution of the Earth and planets
    Date (from‐to) : 1988
  • Planetary surface environment
    Date (from‐to) : 1988
  • Material evolution from interstellar clouds to planetary systems
    Date (from‐to) : 1993

Educational Activities

Teaching Experience

  • Special Lecture of Cosmosciences 1
    開講年度 : 2017
    課程区分 : 修士課程
    開講学部 : 理学院
    キーワード : 惑星科学、天文学、地球物理学
  • Special Lecture of Cosmosciences 1
    開講年度 : 2017
    課程区分 : 修士課程
    開講学部 : 理学院
    キーワード : 飛翔体技術,飛翔体観測,惑星探査,天文衛星
  • Special Lecture of Cosmosciences 2
    開講年度 : 2017
    課程区分 : 修士課程
    開講学部 : 理学院
    キーワード : 飛翔体技術,飛翔体観測,惑星探査,天文衛星
  • Advanced Course on Planetary Systems 1
    開講年度 : 2017
    課程区分 : 修士課程
    開講学部 : 理学院
    キーワード : 比較惑星学、地球、月、地球型惑星、木星型惑星、氷衛星、太陽系小天体、系外惑星
  • Basic Earth and Planetary Science Ⅱ
    開講年度 : 2017
    課程区分 : 学士課程
    開講学部 : 全学教育
    キーワード : 宇宙,惑星,大気と海洋の運動と構造,気候変動,地球環境
  • Dynamic Earth
    開講年度 : 2017
    課程区分 : 学士課程
    開講学部 : 理学部
    キーワード : 地球惑星大気、放射、静水圧平衡、熱力学、気体分子運動論、物質循環、エネルギー収支、大気の起源と進化、系外惑星
  • Physics for Planetary Atmosphere
    開講年度 : 2017
    課程区分 : 学士課程
    開講学部 : 理学部
    キーワード : 地球惑星大気、放射、静水圧平衡、熱力学、気体分子運動論、物質循環、エネルギー収支、大気の起源と進化、系外惑星
  • Exercises in Information Sciences
    開講年度 : 2017
    課程区分 : 学士課程
    開講学部 : 理学部
    キーワード : 計算機ネットワーク、計算機、基本作法、基礎技術、情報科学、地球惑星情報学
  • Exercises in Earth and Planetary Information Sciences
    開講年度 : 2017
    課程区分 : 学士課程
    開講学部 : 理学部
    キーワード : 計算機ネットワーク、計算機、基本作法、基礎技術、情報科学、地球惑星情報学


Copyright c MEDIA FUSION Co.,Ltd. All rights reserved.