研究者データベース

PODOLSKIY EVGENY(ポドリスキ エブゲニ)
北極域研究センター
助教

基本情報

通称等の別名

    Podolskiy Evgeny

所属

  • 北極域研究センター

職名

  • 助教

学位

  • 理学博士(名古屋大学)

ホームページURL

科研費研究者番号

  • 80775536

J-Global ID

研究キーワード

  • icequake   soundscape   narwhal   hydro-acoustics   Patagonia   Antarctica   Himalaya   Greenland   雪氷   雪   雪崩   氷河   氷河地震   

研究分野

  • 環境・農学 / 環境動態解析 / glaciology, natural hazards, environment

職歴

  • 2019年04月 - 現在 The Cryosphere Editor
  • 2015年12月 - 現在 Hokkaido University Arctic Research Center Assistant Professor, Group Sub Leader
  • 2015年04月 - 2015年11月 Hokkaido University Institute of Low Temperature Science JSPS Research Fellow
  • 2012年06月 - 2014年06月 Joseph Fourier University IRSTEA Marie Curie Research Fellow
  • 2011年01月 - 2012年05月 Joseph Fourier University IRSTEA Postdoctoral Scholar
  • 2010年08月 - 2010年12月 Nagoya University Graduate School of Environmental Science Researcher

学歴

  • 2008年10月 - 2010年06月   Nagoya University   Graduate School of Environmental Studies   Ph.D.
  • 2003年09月 - 2005年06月   Moscow State University   Faculty of Geography   M.Sc.
  • 1999年09月 - 2003年06月   Moscow State University   Faculty of Geography   B.Sc.
  • 1996年09月 - 1999年06月   Lyceum of Information Technology #1533

研究活動情報

論文

  • Rapidly changing glaciers, ocean and coastal environments, and their impact on human society in the Qaanaaq region, northwestern Greenland
    Sugiyama, etal, incl. E. Podolskiy
    Polar Science POLAR-D-20-00046 2021年 [査読有り]
  • Ice cliff dynamics of debris-covered Trakarding Glacier in the Rolwaling region, Nepal Himalaya
    Yota Sato, Koji Fujita, Hiroshi Inoue, Sojiro Sunako, Akiko Sakai, Akane Tsushima, Evgeny A. Podolskiy, Rakesh Kayastha, Rijan Bhakta Kayastha
    Frontiers in Earth Science Discussions 2020年10月 [査読有り]
  • Thinning leads to calving-style changes at Bowdoin Glacier, Greenland
    Eef C. H. van Dongen, Guillaume Jouvet, Shin Sugiyama, Evgeny A. Podolskiy, Martin Funk, Douglas I. Benn, Fabian Lindner, Andreas Bauder, Julien Seguinot, Silvan Leinss, Fabian Walter
    The Cryosphere Discussions 2020年10月 [査読有り][通常論文]
  • Podolskiy E.A., Sugiyama S.
    Journal of Geophysical Research: Oceans 2020年04月 [査読有り][通常論文]
  • Podolskiy E.A.
    Geophysical Research Letters 47 e2020GL086951 n/a - n/a 2020年03月 [査読有り][通常論文]
  • Minowa M, Podolskiy E, Sugiyama S
    Annals of Glaciology 60 79 n/a - n/a 2019年05月 [査読有り][通常論文]
  • Podolskiy Evgeny
    Journal of Geophysical Research 124 n/a - n/a 2019年05月 [査読有り][通常論文]
  • Minowa, M, E.A. Podolskiy, G. Jouvet, Y. Weidmann, D. Sakakibara, S. Tsutaki, R. Genco, S. Sugiyama
    Earth and Planetary Science Letters 515 283 - 290 2019年04月 [査読有り][通常論文]
  • De Biagi, V, Barbero, M, Barpi, M, Borri-Brunetto, M, E. Podolskiy
    European Journal of Mechanics / A Solids 74 26 - 33 2018年10月 [査読有り][通常論文]
  • Podolskiy, E. A, Fujita, K, Sunako, S, Tsushima, A, Kayastha, R
    Geophysical Research Letters 45 9699 - 9709 2018年08月 [査読有り][通常論文]
  • Masahiro Minowa, Evgeny A. Podolskiy, Shin Sugiyama, Daiki Sakakibara, Pedro Skvarca
    Journal of Glaciology 64 245 362 - 376 2018年06月01日 [査読有り][通常論文]
     
    Calving plays a key role in the recent rapid retreat of glaciers around the world. However, many processes related to calving are poorly understood since direct observations are scarce and challenging to obtain. When calving occurs at a glacier front, surface-water waves arise over the ocean or a lake in front of glaciers. To study calving processes from these surface waves, we performed field observations at Glaciar Perito Moreno, Patagonia. We synchronized time-lapse photography and surface waves record to confirm that glacier calving produces distinct waves compared with local noise. A total of 1074 calving events were observed over the course of 39 d. During austral summer, calving occurred twice more frequently than in spring. The cumulative distribution of calving-interevent time interval followed exponential model, implying random occurrence of events in time. We further investigated wave properties and found that source-to-sensor distance can be estimated from wave dispersion within ∼20% error. We also found that waves produced by different calving types showed similar spectra in the same frequency range between 0.05-0.2 Hz, and that the amplitude of surface waves increased with the size of calving. This study demonstrates the potential of surface-wave monitoring for understanding calving processes.
  • Sugiyama, S, Tsutaki, S, Sakakibara, D, Saito, J, Ohashi, Y, Katayama, N, Podolskiy, E, Matoba, S, Funk, M, Genco, R
    Low Temperature Science 75 1 - 13 2017年03月 [査読無し][通常論文]
  • Podolskiy Evgeny
    Low Temperature Science 75 15 - 36 2017年03月 [査読無し][招待有り]
  • Evgeny A. Podolskiy, Fabian Walter
    REVIEWS OF GEOPHYSICS 54 4 708 - 758 2016年12月 [査読有り][招待有り]
     
    The last decade witnessed an explosion in yearly number of publications on passive glacier seismology. The seismic signals from a wide range of glacier-related processes fill a broad band of frequencies (from 10(-3) to 10(2) Hz) and moment magnitudes (from M-3 to M7) providing a fresh and unprecedented view on fundamental processes in the cryosphere. New insights into basal motion, iceberg calving, glacier, iceberg, and sea ice dynamics, and precursory signs of unstable glaciers and ice structural changes are being discovered with seismological techniques. These observations offer an invaluable foundation for understanding ongoing environmental changes and for future monitoring of ice bodies worldwide. In this review we discuss seismic sources in the cryosphere as well as research challenges for the near future. The field of glacier seismology is evolving so rapidly that some parts of this review will likely soon be outdated. Nevertheless, given an overwhelming number of recent publications and rapidly growing seismic data volumes provided by modern seismic installations in polar and mountain regions, this introduction to cryosphere seismicity aims to serve as a timely and comprehensive reference for glaciologists and seismologists.
  • Evgeny A. Podolskiy, Shin Sugiyama, Martin Funk, Fabian Walter, Riccardo Genco, Shun Tsutaki, Masahiro Minowa, Maurizio Ripepe
    GEOPHYSICAL RESEARCH LETTERS 43 5 2036 - 2044 2016年03月 [査読有り][通常論文]
     
    Glacier microseismicity is a promising tool to study glacier dynamics. However, physical processes connecting seismic signals and ice dynamics are not clearly understood at present. Particularly, the relationship between tide-modulated seismicity and dynamics of calving glaciers remains elusive. Here we analyze records from an on-ice seismometer placed 250m from the calving front of Bowdoin Glacier, Greenland. Using high-frequency glacier flow speed measurements, we show that the microseismic activity is related to strain rate variations. The seismic activity correlates with longitudinal stretching measured at the glacier surface. Both higher melt rates and falling tides accelerate glacier motion and increase longitudinal stretching. Long-term microseismic monitoring could therefore provide insights on how a calving glacier's force balance and flow regime react to changes at the ice-ocean interface.
  • Evgeny A. Podolskiy, Valentina A. Lobkina, Yuri V. Gensiorovsky, Emmanuel Thibert
    COLD REGIONS SCIENCE AND TECHNOLOGY 114 44 - 60 2015年06月 [査読有り][通常論文]
     
    Systematic snow disposal from street cleaning operations may create large anthropogenic snow/ice bodies. Such man-made cryospheric objects may be considered as complex geophysical interfaces between the atmosphere, landscape, soils and hydrosphere. Urban snow patches not only produce large amounts of meltwater (and therefore a risk of flooding), but also serve as multiphase chemical reactors due to highly polluted mixture of snow/ice with various materials and water inclusions. However, the exact roles of snow patches in the environment and the factors driving their temporal evolution remain unclear. They are nevertheless of major importance for informed decision making and sustainable disposal operations. Here we present the results of a 4-year monitoring program concerning two artificial snow patches near the town of Yuzhno-Sakhalinsk (Russia) and the results of numerical modeling inferring the main corresponding processes, i.e. melting and water discharges. The temperature-based index method proved adequate to assess the evolution of the two snow patches. Constant ablation factors of about 0.45-0.58 and 0.27-0.31 cm w.e. d(-1) degrees C-1, respectively, were found to be appropriate for a first order approximation of snow patch melt dynamics. However, twice lower melt rates were found for one of the two closely located snow patches. This suggests that other factors, such as debris content, likely play a role. This difference in melting can be accounted for by modulating the ablation factor according to debris properties. In terms of peak daily water discharge, snow patch melting produces about 5-15 cm w.e. per day, comparable to rain rates during regional typhoons. This study represents a starting point that should be followed by a more detailed monitoring program and the application of a more complex numerical model of snow disposal sites, to allow optimization of their maintenance. For example, marginal melting or the combined influence of debris and soils on surface runoff should be further investigated. Moreover, better constrained and formulated chemical processes will allow a more reliable estimate of the local environmental impact of regular snow disposal. (C) 2015 The Authors. Published by Elsevier B.V.
  • E. A. Podolskiy, G. Chambon, M. Naaim, J. Gaume
    NATURAL HAZARDS AND EARTH SYSTEM SCIENCES 15 1 119 - 134 2015年 [査読有り][通常論文]
     
    Snowpack weak layers may fail due to excess stresses of various natures, caused by snowfall, skiers, explosions or strong ground motion due to earthquakes, and lead to snow avalanches. This research presents a numerical model describing the failure of "sandwich" snow samples subjected to shaking. The finite element model treats weak layers as interfaces with variable mechanical parameters. This approach is validated by reproducing cyclic loading snow fracture experiments. The model evaluation revealed that the Mohr-Coulomb failure criterion, governed by cohesion and friction angle, was adequate to describe the experiments. The model showed the complex, non-homogeneous stress evolution within the snow samples and especially the importance of tension on fracture initiation at the edges of the weak layer, caused by dynamic stresses due to shaking. Accordingly, a simplified analytical solution, ignoring the inhomogeneity of tangential and normal stresses along the failure plane, may incorrectly estimate the shear strength of the weak layers. The values for "best fit" cohesion and friction angle were approximate to 1.6 kPa and 22.5-60 degrees. These may constitute valuable first approximations in mechanical models used for avalanche forecasting.
  • Evgeny A. Podolskiy, Kaoru Izumi, Vladimir E. Suchkov, Nicolas Eckert
    JOURNAL OF GLACIOLOGY 60 221 409 - 430 2014年 [査読有り][通常論文]
     
    The analysis of historical avalanche data is important when developing accurate hazard maps. The record of snow-avalanche disasters on Sakhalin and the Kuril Islands is incomplete, due to the historical division into periods of Japanese and Russian rule. Here we combine and analyze data from Japanese and Russian sources to reconstruct a continuous record of avalanche catastrophes in the region from 1910 to 2010. Despite the relatively small scale of the majority of catastrophic avalanches, with a total vertical drop <200 m, we document evidence that places the region among the most avalanche-affected areas in the world. In total, 756 fatalities and >238 injuries have occurred in 275 incidents over a 100 year period (two-thirds of those killed were Japanese). This death toll is higher than that in Canada, New Zealand or Iceland, or non-recreational fatalities in France. A wave of avalanche disasters (1930s-60s) following intense colonization of Sakhalin and the Kuril Islands is evident. Although this 'wave' could be considered a local issue of the past, many presently developing countries may face similar situations. The fatality rate has decreased over time, due to social factors, and differs from that of any other region, in its absence of deaths through recreational activities. Although in recent years the fatality rate is lower than that of Iceland or the USA, the per capita avalanche casualty rate on Sakhalin and the Kuril Islands remains among the highest in the world.
  • E. A. Podolskiy, M. Barbero, F. Barpi, G. Chambon, M. Borri-Brunetto, O. Pallara, B. Frigo, B. Chiaia, M. Naaim
    CRYOSPHERE 8 5 1651 - 1659 2014年 [査読有り][通常論文]
     
    Natural sintering in ice is a fundamental process determining mechanical properties of various ice forms. According to the literature, limited data are available about the complex subjects of snow sintering and bond formation. Here, through cold laboratory mechanical tests with a new shear apparatus we demonstrate time-dependent effects of isothermal sintering on interface strengthening at various normal pressures. Measurements showed that interfacial strength evolved rapidly, conforming to a power law ( mean exponent approximate to 0.21); higher pressure corresponded to higher initial strength and sintering rates. Our findings are consistent with observations on homogeneous snow, provide unique records essential for slope stability models and indicate the significant importance of normal load on data interpretation.
  • E. A. Podolskiy, G. Chambon, M. Naaim, J. Gaume
    JOURNAL OF GLACIOLOGY 59 218 1189 - 1201 2013年 [査読有り][通常論文]
  • Evgeny Andreevich Podolskiy, Bjorn Egil Kringlebotn Nygaard, Kouichi Nishimura, Lasse Makkonen, Edward Peter Lozowski
    JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES 117 1 2012年06月 [査読有り][通常論文]
     
    A mesoscale atmospheric model, the Weather Research and Forecasting model (WRF), was used for a case study that reconstructs mid-spring episodes of rime formation at Mt. Zao, Japan. One particularly interesting and rare form of rime was observed. The formations were feathery, opaque aggregates of granular ice 15-30 cm long, called "shrimp tails" in Japanese. Based on an analysis of model-generated results, we find good quantitative agreement of modeled and observed wind and temperature time series at Jizosancho ropeway station. We identified two icing events (lasting for 36 and 41 h respectively, with surface air temperatures between -6.3 degrees and -0.1 degrees C, relatively constant westerly winds up to 26 m s(-1), and maximum cloud liquid water contents (LWC) between 0.72 and 1.05 g m(-3)). We confirmed that high-resolution modeling (1.1 km grid spacing) was much more accurate than simulations with coarser grids (10 and 3.3 km). The LWC during the formation period of this rare type of icing was estimated for the first time using the WRF model at Mt. Zao, and it was found to be up to several times higher than values previously used in experimental studies. We found that the joint wind speed-air temperature distribution for this type of "tail" rime was more similar to that of a hard rime or glaze, than to a soft rime. We explain the formation of "shrimp tails" by wind impact angle and report previously made laboratory results on its effect on the droplet collision efficiency and the density of rime ice.
  • Podolskiy E
    Science. 2012年06月 [査読有り][通常論文]
     
    Podolskiy, E, 2012, 'Perspective: Learning from Others' Mistakes', <i>Science</i>.
  • Evgeny A. Podolskiy, Kouichi Nishimura, Osamu Abe, Pavel A. Chernous
    JOURNAL OF GLACIOLOGY 56 197 431 - 446 2010年 [査読有り][通常論文]
     
    Strong ground motions caused by earthquakes can induce catastrophic avalanches. Massive snow avalanching has also been observed on slopes near quarries and underground mines where ground motions are produced by explosives. To address a lack of information regarding seismogenic snow avalanches, we have compiled an inventory to document case histories. For the period 1899-2010, 22 cases are identified worldwide, related to natural or artificial seismicity with magnitudes of 1.9 <= M(w) <= 9.2 and source-to-site distances of similar to 0.2-640 km. In the extreme case, many thousands of simultaneously released large-scale avalanches have been reported. The obtained distribution and variety of parameters are discussed and compared with earthquake-induced landslides and ice avalanches; the results are similar among these three types of failure events, although all data derived from statistical analyses (i.e. non-witnessed cases) represent outliers, suggesting a significant reduction in the threshold magnitudes proposed for landslides. This proposal could be verified by the collection of additional data.
  • Evgeny A. Podolskiy, Kouichi Nishimura, Osamu Abe, Pavel A. Chernous
    JOURNAL OF GLACIOLOGY 56 197 447 - 458 2010年 [査読有り][通常論文]
     
    We conducted experiments on the stability of snow, subjecting snow to vibrations, with the aim of improving our understanding of poorly studied mechanisms behind the triggering of avalanches during earthquakes. Most experiments were carried out on a specially constructed shaking table using artificial snowpacks containing a weak layer. Accelerations in the snow samples were measured using high-frequency sensors, enabling calculation of vibration-induced stresses within the snow at the moment of fracture. We used a high-speed camera to film different types of fracturing. In all cases, the vibrations caused failure of the snow by fracturing along the weak layer or at the base of the snow sample. An additional inertial stress induced by accelerations normal to the shear plane was quantified. We find that this stress can be related to smaller values of the shear strength in snow.
  • Evgeny A. Podolskiy
    EARTH INTERACTIONS 13 4 1 - 14 2009年 [査読有り][通常論文]
     
    A covariation of recent global environmental changes and seismicity on Earth is demonstrated. Presently, rising concern about anthropogenic activities and their consequences on the cryosphere and environment have always overlooked changes related to future tectonic activity. Possible factors affecting an increase in the number of earthquakes and volcanic eruptions are reviewed and discussed.
  • Podolskiy E
    103 213 - 221 2007年 [査読有り][通常論文]
     
    Podolskiy, E, 2007, 'Unexpected Aspect. Jean Louis Rodolphe Agassiz', Data of Glaciological Studies, vol. 103, pp. 213-221.
    Biography and scientific contributions of J. L. R. Agassiz, the founder of experimental Glaciology.

講演・口頭発表等

  • Listening to the language of Arctic unicorns and ice-quakes  [招待講演]
    Global ecosystem and environmental changes in the Arctic 2020年12月 口頭発表(一般)
  • Multi-purpose ocean acoustic observations in a glacier fjord
    Evgeny Podolskiy
    ArCS-II Meeting 2020年08月 口頭発表(一般)
  • Glacier tremors revealed by Ocean Bottom Seismometer in Greenland
    Evgeny Podolskiy, Yoshio Murai, Naoya Kanna, Shin Sugiyama
    JpGU-AGU Joint Meeting 2020 2020年07月 口頭発表(一般)
  • Dynamics of a subglacial meltwater plume revealed by continuous subsurface monitoring directly on the calving front
    Evgeny Podolskiy, Naoya Kanna, Shin Sugiyama
    EGU General Assembly 2020 2020年05月 口頭発表(一般)
  • Sounds of narwhals in a glacier fjord
    Podolskiy E.A.
    2020年ArCSテーマ2課題間連携会合 2020年02月 口頭発表(一般)
  • Listening to the language of unicorns and ice-quakes in Greenland  [通常講演]
    Podolskiy Evgeny
    Seminar for Young Leaders from Alaska (Kakehashi project, MoFA) 2019年12月 公開講演,セミナー,チュートリアル,講習,講義等
  • グリーンランドにおけるOBS(海底地震計)を用いた氷河地震とクジラの研究  [通常講演]
    Podolskiy Evgeny
    第3回地震火山センター談話会 2019年10月 口頭発表(一般)
  • Continuous and discrete ice-quakes due to fracture, slow slip and fluids  [招待講演]
    Podolskiy Evgeny
    The International Statistical Seismology (StatSei) workshop 2019年08月 口頭発表(招待・特別)
  • Volcanic‐like long-period seismic events at a tidewater glacier in Greenland  [通常講演]
    Podolskiy Evgeny
    EGU General Assembly 2019 2019年04月 口頭発表(一般)
  • Thermal fracturing on a Himalayan debris-covered glacier  [招待講演]
    Podolskiy Evgeny
    EGU General Assembly 2019 2019年04月 口頭発表(招待・特別)
  • Hydro-acoustic monitoring of mammals and ice dynamics in Greenland  [通常講演]
    Podolskiy Evgeny
    ArCS合同セミナー (テーマ2とテーマ6)、北海道大学水産学部、函館 2019年03月 口頭発表(一般)
  • Podolskiy Evgeny
    北海道大学低温科学研究所共同利用研究集会 「気候変化に伴う質量収支と氷河変動に関する研究」 2019年01月 口頭発表(一般)
  • Nocturnal Thermal Fracturing of a Himalayan Debris-covered Glacier: Evidence from Ambient Seismic Noise and Numerical Modeling  [通常講演]
    Podolskiy Evgeny
    AGU Fall Meeting 2018 2018年12月 口頭発表(一般)
  • Hydraulic Link between Glacier-dammed Lake and Meltwater Plume Revealed by Seismic Tremor, Time-lapse Imagery, Radar and Mooring  [通常講演]
    Podolskiy Evgeny
    AGU Fall Meeting 2018 2018年12月 口頭発表(一般)
  • 氷河末端の係留観測で明らかになった氷河融解水プルームによる乱流中のエネ ルギーカスケード  [通常講演]
    Podolskiy Evgeny
    ArCS氷河氷床・海洋相互作用課題 第2回会合 2018年11月 口頭発表(一般)
  • Nocturnal thermal fracturing of a Himalayan debris-covered glacier: Evidence from ambient seismic noise and numerical modelling  [通常講演]
    Podolskiy Evgeny
    Glaciological Seminar, VAW/ETH-Zurich 2018年10月
  • Seismic symphony of a tidewater glacier: tide-modulated cracks, subglacial GLOFs, calving and sliding tremors  [通常講演]
    Podolskiy Evgeny
    Glaciological Seminar, VAW/ETH-Zurich 2018年09月
  • Long-period seismic events and tremor at a tidewater glacier in Greenland  [通常講演]
    Podolskiy Evgeny
    European Seismological Commission General Assembly 2018 2018年09月 口頭発表(一般)
  • Ambient seismic noise に記録されたネパールヒマラヤのデブリ氷河における夜間の熱的破砕現象  [通常講演]
    Podolskiy Evgeny
    地震火山研究観測センター, 2018年度 第2 回談話会 2018年07月
  • Ambient seismic noise at a Himalayan debris-covered glacier  [通常講演]
    Podolskiy Evgeny
    Japan Geoscience Union Meeting 2018年05月
  • Seismic noise as a treasure mountain for a glaciologist  [通常講演]
    Podolskiy Evgeny
    地震火山研究観測センター, 2017年度 第4 回談話会 2018年01月
  • Seismic noise as a proxy for glacier dynamics  [通常講演]
    Podolskiy Evgeny
    5th International Symposium on Arctic Research (ISAR-5) 2018年01月 口頭発表(一般)
  • 雑微動: 地震学者の頭痛の種氷河学者にとっては宝の山  [通常講演]
    Podolskiy Evgeny
    グリンランド氷床における近年の質量損失の実態解明 2017年11月

その他活動・業績

共同研究・競争的資金等の研究課題

  • 氷河学における新た なプロキシとしての 地震波解析
    JSPS:Grants-in-Aid for Scientific Research
    研究期間 : 2018年04月 -2021年03月 
    代表者 : Podolskiy Evgeny

教育活動情報

主要な担当授業

  • 大学院共通授業科目(一般科目):自然科学・応用科学
    開講年度 : 2018年
    課程区分 : 修士課程
    開講学部 : 大学院共通科目


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