豊田 威信


所属



略歴


研究テーマ


教育関連


外部研究資金(代表者)

  • 日本学術振興会 科学研究費補助金
    • 季節海氷域の実態に基づく数値海氷モデルの構築(基盤研究(C))
      (2006年度~2008年度)
    • 季節海氷域の氷厚グローバルマッピングおよび数値海氷モデルへの応用(基盤研究(C))
      (2009年度~2011年度)
    • 氷縁域における波ー海氷相互作用および氷盤分布の形成過程に関する研究(基盤研究(C))
      (2012年度~2014年度)
    • 衛星と現場観測による氷厚分布変動の監視および季節海氷域の海氷力学過程の解明(基盤研究(C))
      (2016年度~2018年度)
    • 北極海の長期包括的観測データに基づく海氷変形過程のパラメタリゼーションの開発(基盤研究(C))
      (2019年度~2021年度)

  • 日本学術振興会 特定国派遣研究者
    • 氷縁域における波ー海氷相互作用および氷盤分布との関わりに関する研究
      ニュージーランド(オタゴ大学など)、(2011年7月23日~9月19日)

  • 宇宙航空研究開発機構 ALOSデータ利用公募型共同研究
    • PALSARを用いた季節海氷域の氷厚分布推定アルゴリズムの開発
      (2010年4月~2013年3月)

  • 宇宙航空研究開発機構 第2回地球観測研究公募共同研究
    • L-band合成開口レーダーを用いて北極海の変形氷を検出するためのアルゴリズムの検証
      (2019年5月~2022年3月)

学会各種委員

  • 2001年~2003年 日本雪氷学会北海道支部会計幹事
  • 2019年~2023年 International Union of Geodesy and Geophysics (IUGG)
    International Association of Cryospheric Sciences (IACS)
    Head of Sea Ice, Lake and River Ice Division

原著論文(査読あり)

  • Zhang, W., N. Ebuchi, Y. Fukamachi, F. Cheng, Kay I. Ohshima, B. Emery, T. Toyota, H. Abe, and K. Shirasawa:
    Sea Ice Observation by High Frequency Ocean Radar.
    IEEE Transactions on Geoscience and Remote Sensing (in press).
  • Kanna, N., Y. Sibano, T. Toyota, and J. Nishioka (2018):
    Winter iron supply processes fueling spring phytoplankton growth in a sub-polar marginal sea, the Sea of Okhotsk:
    Importance of sea ice and the East Sakhalin Current.
    Marine Chemistry, 206, 109-120, doi.org/10.1016/j.marchem.2018.08.006.
  • Nihashi, S., N.T. Kurtz, T. Markus, K.I. Ohshima, K. Tateyama, and T. Toyota (2018):
    Estimation of sea-ice thickness and volume in the Sea of Okhotsk based on ICESat data.
    Annals of Glacilogy, 59(76), 101-111. https://doi.org/10.1017/aog.2018.8
  • Toyota, T., and N. Kimura (2018):
    An examination of the sea ice rheology for seasonal ice zones based on ice drift and thickness observations.
    Journal of Geophysical Research: Oceans, 123, 1406-1428. https://doi.org/10.1002/2017JC013627.
  • Ohata, Y., T. Toyota, and A.D. Fraser (2017):
    The role of snow in the thickening processes of lake ice at Lake Abashiri, Hokkaido, Japan.
    Tellus A: Dynamic Meteorology and Oceanography, 69:1, 1391655, doi: 10.1080/16000870.2017.1391655.
  • Ohata, Y., T. Toyota, and T. Shiraiwa (2016):
    Lake ice formation processes and thickness evolution at Lake Abashiri, Hokkaido, Japan.
    Journal of Glaciology, 62(233), 563-578, doi:10.1017/jog.2016.57.
  • Toyota, T., R. Massom, O. Lecomte, D. Nomura, P. Heil, T. Tamura, and A.D. Fraser (2016):
    On the extraordinary snow on the sea ice off East Antarctica in late winter, 2012.
    Deep-Sea Research II, 131, 53-67, doi:10.1016/j.dsr2.2016.02.003.
  • Toyota, T., A.L. Kohout, and A.D. Fraser (2016):
    Formation processes of sea ice floe size distribution in the interior pack and its relationship to the marginal ice zone off East Antarctica.
    Deep-Sea Research II, 131, 28-40, doi:10.1016/j.dsr2.2015.10.003.
  • Lecomte, O., and T. Toyota (2016):
    Influence of wet conditions on snow temperature diurnal variations: An East-Antarctic sea ice case study.
    Deep-Sea Research II, 131, 68-74, doi:10.1016/j.dsr2.2015.12.011.
  • Kohout, A.L., M.J.M. Williams, T. Toyota, J. Lieser, and J. Hutchings (2016):
    In situ observations of wave-induced sea ice breakup.
    Deep-Sea Research II, 131, 22-27, doi:10.1016/j.dsr2.2015.06.010.
  • Williams, G. D., A. D. Fraser, A. Lucieer, D. Turner, E. Cougnon, P. Kimball, T. Toyota, T. Maksym, H. Singh, F. Nitsche, and M. Paget (2016):
    Drones in a cold climate, Eos, 97(5), 17-21, doi:10.1029/2016EO043673.
  • Tamura, T., K.I. Ohshima, J.L. Lieser, T. Toyota, K. Tateyama, D. Nomura, K. Nakata, A.D. Fraser, P.W. Jansen, K.B. Newbery, R.A. Massom, and S. Ushio (2015):
    Helicopter-borne observations with portable microwave radiometer in the Southern Ocean and the Sea of Okhotsk.
    Annals of Glaciology, 56(69), 436-444.
  • Granskog, M.A., D. Nomura, S. Muller, A. Krell, T. Toyota, and H. Hattori (2015):
    Evidence for significant protein-like dissolved organic matter accumulation in Sea of Okhotsk sea ice.
    Annals of Glaciology, 56(69), 1-8.
  • Kanna, N., T. Toyota, and J. Nishioka (2014):
    Iron and macro-nutrient concentrations in sea ice and their impact on the nutritional status of surface waters in the southern Okhotsk Sea.
    Progress in Oceanography, 126, 44-57.
  • Toyota, T., I.J. Smith, A.J. Gough, P.J. Langhorne, G.H. Leonard, R.J. Van Hale, A.R. Mahoney, and T.G. Haskell (2013):
    Oxygen isotope fractionation during the freezing of seawater. Journal of Glaciology, 59(216), 697-710.
  • Ishii, H. and T. Toyota (2012):
    Temporal evolution of the structural properties of seasonal sea ice during the early melt season.
    Journal of Glaciology, 58(207), 23-37.
  • Toyota, T., S. Ono, K. Cho, and K.I. Ohshima (2011):
    Retrieval of sea ice thickness distribution in the Sea of Okhotsk from ALOS/PALSAR backscatter data.
    Annals of Glaciology, 52(57), 177-184.
  • Toyota, T., R. Massom, K. Tateyama, T. Tamura, and A. Fraser (2011):
    Properties of snow overlying the sea ice off East Antarctica in late winter 2007. Deep Sea Research II, 58(9-10), 1137-1148.
  • Toyota, T., C. Haas, and T. Tamura (2011):
    Size distribution and shape properties of relatively small sea ice floes in the Antarctic marginal ice zones in late winter.
    Deep Sea Research II, 58(9-10), 1182-1193.
  • Nomura, D., H. Yoshikawa-Inoue, T. Toyota, K. Shirasawa (2010):
    Effects of snow, snow-melting and re-freezing processes on air-sea ice CO2 flux. Journal of Glaciology, 56(196), 262-270.
  • Nomura, D., J. Nishioka, M. A. Granskog, A. Krell, S. Matoba, T. Toyota, H. Hattori and K. Shirasawa (2010):
    Nutrient distributions associated with snow and sediment-laden layers in sea ice of the southern Sea of Okhotsk.
    Marine Chemistry, 119, 1-8.
  • Nakamura, K., S. Aoki, T. Toyota, and Y. Aoyama (2010):
    Meridional distribution and seasonal variation of stable oxygen isotope ratio of precipitation in the Southern Ocean.
    Antarctic Record, 54(2), 190-202. (in Japanese with English summary)
  • Fujisaki, A., H. Yamaguchi, T. Toyota, A. Futatsudera and M. Miyanaga (2009):
    Measurements of air-ice drag coefficient over the ice-covered Sea of Okhotsk. Journal of Oceanography, 65(4), 487-498.
  • Toyota, T., K. Nakamura, S. Uto, K.I. Ohshima, and N. Ebuchi (2009):
    Retrieval of sea ice thickness distribution in the seasonal ice zone from air-borne L-band SAR.
    International Journal of Remote Sensing, 30(12), 3171-3189.
  • Toyota, T., S. Takatsuji, K. Tateyama, K. Naoki, K.I. Ohshima (2007):
    Properties of sea ice and overlying snow in the southern Sea of Okhotsk. Journal of Oceanography, 63(3), 393-411.
  • Tateyama, K., K. Shirasawa, S. Uto, T. Kawamura, T. Toyota and H. Enomoto (2006):
    Standardization of electromagnetic-induction measurements of sea-ice thickness in polar and sub-polar seas. Annals of Glaciology, 44, 240-246.
  • Uto, S., T. Toyota, H. Shimoda, K. Tateyama, and K. Shirasawa (2006):
    Ship-borne electromagnetic induction sounding of sea ice thickness in the south Okhotsk Sea. Annals of Glaciology, 44, 253-260.
  • Nomura, D., H. Yoshikawa-Inoue, and T. Toyota (2006):
    The effect of sea-ice growth on air-sea CO2 flux in a tank experiment. Tellus, 58B, 418-426.
  • Fukamachi, Y., G. Mizuta, K. I. Ohshima, T. Toyota, N. Kimura, and M. Wakatsuchi (2006):
    Sea ice thickness in the southwestern Sea of Okhotsk revealed by a moored ice-profiling sonar.
    Journal of Geophysical Research, 111, C09018, doi:10.1029/2005JC003327.
  • Toyota, T., S. Takatsuji, and M. Nakayama (2006):
    Characteristics of sea ice floe size distribution in the seasonal ice zone. Geophysical Research Letters, 33, L02616, doi:10.1029/2005GL024556.
  • Inoue, J. and T. Toyota (2005):
    Characteristics of aerosol number concentrations over the ice-covered Okhotsk Sea. Journal of Meteorological Society of Japan, 83(4), 633-640.
  • Toyota, T., T. Kawamura, K.I. Ohshima, H. Shimoda, and M. Wakatsuchi (2004):
    Thickness distribution, texture and stratigraphy, and a simple probabilistic model for dynamical thickening of sea ice in the southern Sea of Okhotsk.
    Journal of Geophysical Research - Oceans, 109, C06001, doi:10.1029/2003JC002090.
  • Toyota, T., K. Baba, E. Hashiya, and K. I. Ohshima (2002):
    In-situ ice and meteorological observations in the southern Sea of Okhotsk in 2001 winter: ice structure, snow on ice, surface temperature, and optical environments.
    Polar Meteorology and Glaciology, 16, 116-132.
  • Tateyama, K., H. Enomoto, T. Toyota, and S. Uto (2002):
    Sea ice thickness estimated from passive microwave radiometers. Polar Meteorology and Glaciology, 16, 15-31.
  • Toyota, T. and M. Wakatsuchi (2001):
    Characteristics of the surface heat budget during the ice-growth season in the southern Sea of Okhotsk. Annals of Glaciology, 33, 230-236.
  • Toyota, T., T. Kawamura and M. Wakatsuchi (2000):
    Heat budget in the ice cover of the southern Okhotsk Sea derived from in-situ observations. Journal of Meteorological Society of Japan, 78(5), 585-596.
  • Ukita, J., T. Kawamura, N. Tanaka, T. Toyota, and M. Wakatsuchi (2000):
    Physical and stable isotopic properties and growth processes of sea ice collected in the southern Sea of Okhotsk.
    Journal of Geophysical Research, 105(C9), 22,083-22,093.
  • Toyota, T., J. Ukita, K. Ohshima, M. Wakatsuchi and K. Muramoto (1999):
    A measurement of sea ice albedo over the southwestern Okhotsk Sea. Journal of Meteorological Society of Japan, 77(1), 117-133.
  • Sumi, A., and T. Toyota (1988):
    Observational study on air-flow around the Tibetan Plateau. Journal of Meteorological Society of Japan, 66(1), 113-124.
  • Nakamura, H., T. Toyota, M. Ohbayashi (1986):
    Geographical distribution of the ratio of lengths of warm fronts to cold fronts in the Northern Hemisphere during 1978-1979 winter.
    Journal of Meteorological Society of Japan, 64(4), 519-529.

著書

  • 豊田威信 (2016):低温環境の科学事典、河村公隆他編、第5章「海洋物理・海氷」、134-139、朝倉書店.
  • 豊田威信 (2015):低温科学便覧, 北海道大学低温科学研究所編,
    第9章「大気と海洋・海氷の相互作用、地球温暖化~海氷の関わる素過程について~」, 198-209, 丸善出版.
  • Toyota, T. (2009): Application of remote sensing to the estimation of sea ice thickness distribution.
    In "Advances in Geoscience and Remote Sensing", Jedlovec,G.(Ed.), pp.21-44, In-Teh, DOI: 10.5772/46139
    ISBN: 978-953-307-005-6, Vienna, Austria.
  • Toyota, T. (2009): A study on growth processes of sea ice in the southern Sea of Okhotsk, 143pp.,
    VDM Verlag, ISBN: 978-3-639-19602-3, Saarbrucken, Germany.
  • 猪上淳,豊田威信 (2007):「海氷域の熱フラックスの観測」, 気象研究ノート, Vol.214, 93-106.

解説・総説

  • Toyota, T. (2018):Guideline of Ocean Observations, Vol. 7, Chap. 5, "Sea Ice", The Oceanographic Society of Japan, G705ENr1:001-047.
    (WMO海氷用語が2014年に改訂されたことに伴う改訂版)
  • 豊田威信(2018):海洋観測ガイドライン, 第7巻第5章「海氷」, 日本海洋学会編, G705JPr1:001-043.
    (WMO海氷用語が2014年に改訂されたことに伴う改訂版)
  • Toyota, T. (2016):Guideline of Ocean Observations, Vol. 7, Chap. 5, "Sea Ice", The Oceanographic Society of Japan, G705EN:001-041.
  • 漢那直也、西岡純、豊田威信(2016):「オホーツク海における海氷が関わる鉄の供給過程の解明」, 低温科学, Vol. 74, 105-114.
  • 豊田威信(2015):海洋観測ガイドライン, 第7巻第5章「海氷」, 日本海洋学会編, G705JP001-037.
  • 豊田威信(2014):「新版 雪氷辞典」(分担執筆)、日本雪氷学会編、古今書院.
  • 豊田威信(2010):「海氷過程のパラメタリゼーション -海氷と波の相互作用の観点から-」, 月刊海洋, 号外No.54, 82-93.
  • 豊田威信(2009):「海氷研究の進展」, 雪氷研究の系譜(日本雪氷学会北海道支部設立50周年記念誌), 77-80.
  • 長幸平、福島繁樹、豊田威信、若林裕之(2007):「PALSARによる海氷観測への期待」, 写真測量とリモートセンシング, 46(3), 11-15.
  • 豊田威信(2003):「オホーツク海の海氷観測ー2003年2月の観測からー」, 月刊海洋10月号, 35(10), 681-687.
  • 豊田威信、河村俊行(2002):「北海道オホーツク海沿岸部の海氷 -砕氷船「そうや」による観測からー」, 月刊海洋/号外No.30, 32-44.
  • 豊田威信(1994):「海氷の話」, 船と気象, 180, 6-15.
  • 豊田威信(1994):「船舶気象報からみたオホーツク海の海氷」, 海と安全, 421, 9-11.
  • 豊田威信(1994):「海氷域の変動」, 近年における世界の異常気象と気候変動 ~その実態と見通し~, 気象庁, 192-195.
  • 豊田威信(1992):「北海道の大雨の主成分分析」, 北海道の農業気象, 44,1-11.
  • 豊田威信(1992):「日本近海の海難に関連した気象」, 海と安全, 400, 7-9.
  • 豊田威信(1991):「丘珠の気象」, 丘珠百二十年史(1181pp.), 100-109.

論文(その他)

  • Ito, M., T. Toyota, J. Nishioka, D. Nomura, N. Kanna, K. Murakami, and K.I. Ohshima (2019): Grease ice observations in the southern Sea of Okhotsk with P/V Soya.
    Proceedings of the 34th International Symposium on Okhotsk Sea & Polar Oceans 2019, Mombetsu, Japan, February 17-22, 247-250.
  • Toyota, T., and J. Ishiyama (2019): Application of ALOS-2/PALSAR-2 for detecting defromed sea ice area in the Sea of Okhotsk.
    Proceedings of the 34th International Symposium on Okhotsk Sea & Polar Oceans 2019, Mombetsu, Japan, February 17-22, 279-282.
  • Takahashi, S., and T. Toyota (2018): Changes of Sea-Ice nomenclature from WMO 1970 to WMO 2014 -What is the English name of "Ryuhyo" (in Japanese)?
    Proceedings of the 33rd International Symposium on Okhotsk Sea & Polar Oceans 2018, Mombetsu, Japan, February 18-21, 322-325.
  • Toyota, T., and J. Ishiyama (2018): Properties of deformed sea ice area in the southern Sea of Okhotsk derived from satellite SAR images.
    Proceedings of the 33rd International Symposium on Okhotsk Sea & Polar Oceans 2018, Mombetsu, Japan, February 18-21, 207-210.
  • Toyota, T., and H. Koda (2016): Tank experiments on the granular ice formation processes.
    Proceedings of the 23rd IAHR International Symposium on Ice, Ann Arbor, USA, ISSN: 2414-6331, 8 pages.
  • Ohata, Y., T. Toyota, A.D. Fraser, and T. Shiraiwa (2016): The role of snow-ice in the thickening processes of lake ice at Lake Abashiri, Hokkaido, Japan.
    Proceedings of the 23rd IAHR International Symposium on Ice, Ann Arbor, USA, ISSN: 2414-6331, 8 pages.
  • Ozeki, T., Y. Yashiro, G. Sagawa, K. Tateyama, and T. Toyota (2016): Field observations of impingign seawater spray
    using sea spray meters, - Case study of the icebreaker Soya -.
    Proceedings of The 31st International Symposium on Okhotsk Sea & Sea Ice, Mombetsu, Japan, February 22-23, 182-185.
  • Koda, H., and T. Toyota (2014):The formation process of granular ice of the seawater in laboratory experiments.
    Proceedings of The 29th International Symposium on Okhotsk Sea & Sea Ice, Mombetsu, Japan, February 16-19, 135-137.
  • Toyota, T., and N. Kimura (2013): On the validity of the sea ice rheology by Hibler for the Sea of Okhotsk ice.
    Proceedings of The 28th International Symposium on Okhotsk Sea & Sea Ice, Mombetsu, Japan, February 18-20, 91-94.
  • Toyota, T., and C. Haas (2011): Possibility of ice thickness retrieval in the Okhotsk Sea and the Lincoln Sea using ALOS/PALSAR.
    Proceedings of The 26th International Symposium on Okhotsk Sea & Sea Ice, Mombetsu, Japan, February 21-23, 63-66.
  • Toyota, T., H. Kamimura, S. Ono, and K. Cho (2009):
    Retrieval of sea ice thickness distribution in the Sea of Okhotsk from ALOS/PALSAR backscatter data.
    Proceedings of The 24th International Symposium on Okhotsk Sea & Sea Ice, Mombetsu, Japan, February 16-18, 138-142.
  • Granskog, M., T. Toyota, H. Hattori, D. Nomura, and A. Krell (2009):
    Observationson physical properties and biogeochemistry of sea ice in southern Sea of Okhotsk.
    Proceedings of The 24th International Symposium on Okhotsk Sea & Sea Ice, Mombetsu, Japan, February 16-18, 183-186.
  • Toyota, T., K. Nakamura, T. Tamura, K. Cho, and K.I. Ohshima (2007):
    Development of sea ice thickness algorithm from PALSAR data, combined with in-situ observations and other satellite data.
    Proceedings of The First Joint PI symposium of ALOS Data Nodes for ALOS Science Program in Kyoto, Japan, December 19-22,
    4 pages (CD-ROM).
  • Toyota, T., K. Nakamura, S. Uto, K.I. Ohshima, and N. Ebuchi (2007):
    Retrieval of ice thickness distribution in the seasonal ice zone from L-band SAR.
    Proceedings of 2007 IEEE International Geoscience and Remote Sensing Symposium, Barcelona, Spain, July 23-27, 4 pages (CD-ROM).
  • Toyota, T. (2007): Retrieval of sea ice thickness distribution with ALOS/PALSAR.
    Proceedings of The 22th International Symposium on Okhotsk Sea and Sea Ice, Mombetsu, Japan, February 18-23, 53.
  • Toyota, T., S. Takatsuji, K. Tateyama, M. Nakayama, K. Naoki, K.I. Ohshima (2004):
    Properties of thick sea ice and overlying snow in the southern Sea of Okhotsk.
    Proceedings of the 17th IAHR International Symposium on Ice, St. Petersburg, Russia, 406-412.
  • Toyota, T. and H. Enomoto (2002): Analysis of the sea ice floes in the Sea of Okhotsk using ADEOS/AVNIR images.
    Proceedings of the 16th IAHR International Symposium on Ice, Dunedin, New Zealand, 211-217.
  • Toyota, T. and H. Enomoto (2002): Analysis of the sea ice floes in the southern Sea of Okhotsk using ADEOS/AVNIR images.
    Proceedings of the 17th international symposium on Okhotsk Sea and sea ice, Mombetsu, 150-156.
  • 豊田威信、河村俊行、中塚武、若土正曉(2001):「オホーツク海南部の海氷の酸素安定同位体比の特徴」、北海道の雪氷、20, 28-31.
  • Toyota, T., T. Kawamura, and J. Ukita (2001): Sea ice structure in the Sea of Okhotsk.
    Proceedings of the international symposium on atmosphere-ocean-cryosphereinteraction in the Sea of Okhotsk and the surrounding environment, Sapporo. 66-67.
  • Toyota, T., T. Kawamura, T. Nakatsuka (2001): Contribution of snow to the sea ice growth in the southern Sea of Okhotsk.
    Proceedings of the international symposium on atmosphere-ocean-cryosphere interaction in the Sea of Okhotsk and the surrounding environment, Sapporo. 56-57.
  • Toyota, T. and K. Sato (1993): The improvement of the thermodynamical process of JMA operational numerical sea ice model in the southern part of the Sea of Okhotsk. Proceedings of 93's international symposium on sea ice, Beijing, 147-154.
  • 豊田威信(1991):「北海道の大雨の主成分分析」、札幌管区気象台技術時報別冊43号, 46-84.
  • 豊田威信(1990):「寿都のだし風の調査」, 札幌管区気象台技術時報別冊41号, 84pp.

訳書

  • 豊田威信(1990):「国際雲図帳(1988年版)・第2巻(WMO)の和訳」, 札幌管区気象台技術時報別冊40号, 109pp.
  • 豊田威信(1990):「気象光学現象について」("Rainbows, Halos, Glories", by R, Greenler (1980)より), 札幌管区気象台技術時報, 116, 69-78.
  • 豊田威信(1989):「国際雲図帳(1956年版)・第2巻(WMO)の和訳」, 札幌管区気象台技術時報別冊39号, 94pp.
  • 豊田威信(1989):「気象光学現象について」("Rainbows, Halos, Glories", by R, Greenler (1980)より), 札幌管区気象台技術時報, 114, 82-95.

研究室HP