北海道大学 大学院水産科学研究院 大学院水産科学院 水産学部

英語サイトへ 北海道大学
准教授
平譯 享
ひらわけ とおる
  • 海洋生物資源科学部門
  • 海洋資源科学科
  • 海洋計測学講座
オフィス
管理研究棟208
メール
hirawake◎fish.hokudai.ac.jp
※「◎」を「@」に変更
電話
0138-40-8844
研究課題
(1) 衛星データを用いた海洋基礎生産力変動に関する研究
(2) 衛星データを用いた植物プランクトンサイズ・グループの変動に関する研究
(3) 海洋の光学的特性と海洋環境・海洋基礎生産の関係
(4) 海色衛星センサーのためのアルゴリズム開発
代表的な業績
Okamoto, S., T. Hirawake and S. Saitoh (2010) Interannual variability in the magnitude and timing of the spring bloom in the Oyashio region. Deep Sea Research II, 57(17-18), 1608-1617.

Hashihama, F., H. Umeda, C. Hamada, S. Kudoh, T. Hirawake, K. Satoh, M. Fukuchi, and Yasuhiro Kashino (2010) Light acclimation states of phytoplankton in the Southern Ocean, determined using photosynthetic pigment distribution. Marine Biology, 157, 2263-2278.

Koubbi, P., C. Ozouf-Costaz, A. Goarant, M. Moteki, P-A. Hulley, R. Causse, A. Dettai, G. Duhamel, P. Pruvost, E. Tavernier, A. Post, R. J. Beaman, S. Rintoul, T. Hirawake, D. Hirano, T. Ishimaru, M. Riddle, and G. Hosie (2010) Estimating the biodiversity of the East Antarctic shelf and oceanic zone for ecoregionalisation: Example of the ichthyofauna of the CEAMARC (Collaborative East Antarctic Marine Census) CAML surveys. Polar Science, 4(2), 115-133.

Saitoh, S-I., R. Mugo, I. N. Radiarta, S. Asaga, F. Takahashi, T. Hirawake, Y. Ishikawa, T. Awaji, T. In, and S. Shima (2011) Some operational uses of satellite remote sensing and marine GIS for sustainable fisheries and aquaculture. ICES Journal of Marine Science, 68, 687-695.

Hirawake, T., S. Takao, N. Horimoto, T. Ishimaru, Y. Yamaguchi and M. Fukuchi (2011) A phytoplankton absorption-based primary productivity model for remote sensing in the Southern Ocean. Polar Biology, 34, 291-302.

Nishino, S., T. Kikuchi, M. Yamamoto-Kawai, Y. Kawaguchi, T. Hirawake, M. Itoh (2011) Enhancement/reduction of biological pump depends on ocean circulation in the sea-ice reduction regions of the Arctic Ocean. Journal of Oceanography, 67, 305-314.
Matsuno, K., A. Yamaguchi, T. Hirawake, I. Imai (2011) Year-to-year changes of the mesozooplankton community in the Chukchi Sea during summers of 1991, 1992, and 2007, 2008. Polar Biology, 34, 1349-1360.

Fujiwara, A., T. Hirawake, K. Suzuki, S-I. Saitoh (2011) Remote sensing of size structure of phytoplankton communities using optical properties of the Chukchi and Bering Sea shelf region. Biogeosciences, 8, 3567-3580.

Hirawake, T., K. Shinmyo, A. Fujiwara, S. Saitoh (2012) Satellite remote sensing of primary productivity in the Bering and Chukchi Seas using an absorption-based approach. ICES Journal of Marine Science, 69, 1194-1204.

Takao, S., T. Hirawake, S. W. Wright, K. Suzuki (2012) Variations of net primary productivity and phytoplankton community composition in the Indian sector of the Southern Ocean as estimated from ocean color remote sensing data. Biogeosciences, 9, 3875-3890.

Syamsuddin, M. L., S-I. Saitoh, T. Hirawake, S. Bachri, A. B. Harto (2013) Effects of El Niño-Southern Oscillation events on catches of Bigeye Tuna (Thunnus obesus) in the eastern Indian Ocean off Java. Fishery Bulletin, 111, 175-188.

Yamaguchi, A., T. Homma, R. Saito, K. Matsuno, H. Ueno, T. Hirawake, I. Imai (2013) East-west differences in population structure and vertical distribution of copepods along 47˚N in the subarctic Pacific in June 2009. Plankton Benthos Research, 8, 116-123.

Liu, Y., S-I. Saitoh, I. N. Radiarta, T. Isada, T. Hirawake, H. Mizuta, H. Yasui (2013) Improvement of an aquaculture site-selection model for Japanese kelp (Saccharina japonica) in southern Hokkaido, Japan: an application for the impacts of climate events. ICES Journal of Marine Science, doi.10.1093/icesjms/fst108.

Liu, Y., S-I. Saitoh, I. N. Radiarta, H. Igarashi, T. Hirawake (2014) Spatiotemporal variations in suitable areas for Japanese scallop aquaculture in the Dalian coastal area from 2003 to 2012. Aquaculture, 422-423, 172-183.

Fujiwara, A., T. Hirawake, K. Suzuki, I. Imai, S-I. Saitoh (2014) Timing of sea ice retreat can alter phytoplankton community structure in the western Arctic Ocean. Biogeosciences, 11, 1705-1716.

Liu, Y., S-I. Saitoh, H. Igarashi, T. Hirawake (2014) The regional impacts of climate change on coastal environments and the aquaculture of Japanese scallops in northeast Asia: case studies from Dalian, China, and Funka Bay, Japan. International Journal of Remote Sensing, 35, 4422-4440.

Kuma, K., R. Sasayama, N. Hioki, Y. Morita, Y. Isoda, T. Hirawake, K. Imai, T. Aramaki, T. Nakamura, J. Nishioka, N. Ebuchi (2014) Chemical evidence for the origin of the cold water belt along the northeastern coast of Hokkaido. Journal of Oceanography, 70, 377-387.

Hirata, T., T. Hirawake, F. Sakaida, H. Yamaguchi, K. Suzuki, H. Murakami, J. Ishizaka, H. Kobayashi, A. Fujiwara, M. Toratani, S. Saitoh (2014) Development and verification of SGLI/GCOM-C1 ocean algorithms. Journal of the Remote Sensing Society of Japan, 34, 278-285.

Takao, S., T. Hirawake, G. Hashida, H. Sasaki, H. Hattori, K. Suzuki (2014) Phytoplankton community composition and photosynthetic physiology in the Australian sector of the Southern Ocean during the austral summer of 2010/2011. Polar Biology, 37, 1563-1578.

Aura, C. M., S-I. Saitoh, Y. Liu, T. Hirawake, K. Baba, T. Yoshida (2014) Implications of marine environment change on Japanese scallop (Mizuhopecten yessoensis) aquaculture suitability: a comparative study in Funka and Mutsu Bays, Japan. Aquaculture Research, in press.

Isada, T., T. Hirawake, T. Kobayashi, Y. Nosaka, M. Natsuike, I. Imai, K. Suzuki, S-I. Saitoh (2015) Hyperspectral optical discrimination of phytoplankton community structure in Funka Bay and its implications for ocean color remote sensing of diatoms. Remote Sensing of Environment, 159, 134-151.

Liu, Y., S-I. Saitoh, S. Nakada, X. Zhang, T. Hirawake (2015) Impact of oceanographic environmental shifts and atmospheric events on the sustainable development of coastal aquaculture: A case study of kelp and scallops in southern Hokkaido, Japan. Sustainability, 7, 1263-1279.

Matsuno, K., A. Yamaguchi, T. Hirawake, S. Nishino, J. Inoue, T. Kikuchi (2015) Reproductive success of Pacific copepods in the Arctic Ocean and the possibility of changes in the Arctic ecosystem. Polar Biology, 38, 1075-1079.

Nishino, S., Y. Kawaguchi, J. Inoue, T. Hirawake, A. Fujiwara, R. Futsuki, J. Onodera, M. Aoyama (2015) Nutrient supply and biological response to wind-induced mixing, inertial motion, and currents in the northern Chukchi Sea. Journal of Geophysical Research: Oceans, 120, 1975-1992, doi:10.1002/2014JC010407.

Wang, S., J. Ishizaka, T. Hirawake, Y. Watanabe, Y. Zhu, M. Hayashi, S. Yoo (2015) Remote estimation of phytoplankton size fractions using the spectral shape of light absorption. Optics Express, 23, 10301-10318.

Lee, Y. J., et al. (T. Hirawake, one of 25 co-authors in alphabetical order) (2015) An assessment of phytoplankton primary productivity in the Arctic Ocean from satellite ocean color/in situ chlorophyll-a based models, Journal of Geophysical Research: Oceans, 120, 6508-6541, doi: 10.1002/2015JC011018.

Liu, Y., S-I. Saitoh, Y. Ihara, S. Nakada, M. Kanamori, X. Zhang, K. Baba, Y. Ishikawa, and T. Hirawake (2015) Development of a three- dimensional growth prediction model for the Japanese scallop in Funka Bay, Japan, using OGCM and MODIS. ICES Journal of Marine Science, doi: 10.1093/icesjms/fsv153. (Online, in press)

Reynolds, R. A., A. Matsuoka, T. Hirawake, S. Bélanger, and B. G. Mitchell (2015) Ocean Colour Algorithms and Bio-optical Relationships for Polar Seas (Chapter 4) in Ocean Colour Remote Sensing in Polar Seas. Babin, M., Arrigo, K., Bélanger, S. and Forget, M-H. (eds.), IOCCG Report Series, No. 16, International Ocean Colour Coordinating Group, Dartmouth, Canada.

Arrigo, K., V. Hill, S. Bélanger, B. G. Mitchell, T. Hirawake and M. Babin (2015) Estimates of Net Primary Production from Space-based Measurements (Chapter 5)
in Ocean Colour Remote Sensing in Polar Seas. Babin, M., Arrigo, K., Bélanger, S. and Forget, M-H. (eds.), IOCCG Report Series, No. 16, International Ocean Colour Coordinating Group, Dartmouth, Canada

Fujiwara, A., T. Hirawake, K. Suzuki, L. B. Eisner, I. Imai, S. Nishino, T. Kikuchi, and S-I. Saitoh (2016) Influence of timing of sea ice retreat on phytoplankton size during marginal ice zone bloom period in the Chukchi and Bering shelves. Biogeosciences, 13, 115-131.

Nishino, S., T. Kikuchi, A. Fujiwara, T. Hirawake, M. Aoyama (2016) Water mass characteristics and their temporal changes in a biological hotspot in the southern Chukchi Sea. Biogeosciences, 13, 2563-2578.

Alabia, I., S-I. Saitoh, T. Hirawake, H. Igarashi, Y. Ishikawa, N. Usui, M. Kamachi, T. Awaji, M. Seito (2016) Elucidating the potential squid habitat responses in the central North Pacific to the recent ENSO flavors. Hydrobiologia, 772(1), 215-227.

Syamsuddin, M., S-I. Saitoh, T. Hirawake, F. Syamsudin, M. Zainuddin (2016) Interannual variation of bigeye tuna (Thunnus obesus) hotspots in the eastern Indian Ocean off Java. International Journal of Remote Sensing, 37, 2087-2100.

Syah, A. F., S-I. Saitoh, Alabia, I. D., T. Hirawake (2016) Predicting potential fishing zone for Pacific saury (Cololabis saira) with maximum entropy models and remotely sensed data. Fishery Bulletin, 114(3), 330-342.

Matsuno, K., Sanchez, J. M. L., A. Yamaguchi, T. Hirawake, T. Kikuchi (2016) Spatial and geographical changes in the mesozooplankton community in the Bering and Chukchi Seas during the summers of 2007 and 2008. Polar Science, 10, 335-345.

Tanaka, K., N. Takesue, J. Nishioka, Y. Kondo, A. Ooki, K. Kuma, T. Hirawake, Y. Yamashita (2016) The conservative behavior of dissolved organic carbon in surface waters of the southern Chukchi Sea, Arctic Ocean, during early summer. Scientific Report, 6, 34123, doi:10.1038/srep34123.

Kostadinov, T. S., A. Cabré, H. Vedantham, I. Marinov, A. Bracher, R. J.W. Brewin, A. Bricaud, T. Hirata, T. Hirawake, N. J. Hardman-Mountford, C. Mouw, S. Roy, J. Uitz (2016) Inter-comparison of phytoplankton functional type phenology metrics derived from ocean color algorithms and Earth System Models. Remote Sensing of Environment, 190, 162-177.

Natsuike, M., K. Matsuno, T. Hirawake, A. Yamaguchi, S. Nishino, I. Imai (2017) Possible spreading of toxic Alexandrium tamarense blooms on the Chukchi Sea shelf with the inflow of Pacific summer water due to climatic warming. Harmful Algae, 61, 80-86.

Mouw, Colleen B., Nick J. Hardman-Mountford, Severine Alvain, Astrid Bracher, Robert W. Brewin, Annick Bricaud, Aurea M. Ciotti, Emmanuel Devred, Amane Fujiwara, Takafumi Hirata, Toru Hirawake, Tihomir S. Kostadinov, Shovonlal Roy, Julia Uitz (2017) A Consumer’s Guide to Satellite Remote Sensing of Multiple Phytoplankton Groups in the Global Ocean. Frontiers in Marine Science, 4:41, doi: 10.3389/fmars.2017.00041.

Waga, H., T. Hirawake, A. Fujiwara, T. Kikuchi, S. Nishino, K. Suzuki, S. Takao, S-I. Saitoh (2017) Differences in Rate and Direction of Shifts between Phytoplankton Size Structure and Sea Surface Temperature. Remote Sensing, 9, 222, doi:10.3390/rs9030222.

Zhang, X., S-I. Saitoh, and T. Hirawake (2017) Predicting potential fishing zones of Japanese Common Squid (Todarodes Pacificus) using remotely sensed images in coastal waters of south-western Hokkaido, Japan. International Journal of Remote Sensing, 38 (21), 6129-6146. DOI: 10.1080/01431161.2016.1266114.

Isada, T., T. Hirawake, S. Nakada, T. Kobayashi, K. Sasaki, Y. Tanaka, S. Watanabe, K. Suzuki, S-I. Saitoh (2017) Influence of hydrography on the spatiotemporal variability of phytoplankton assemblages and primary productivity in Funka Bay and the Tsugaru Strait. Estuarine, Coastal and Shelf Science, 188, 199-211.

Landeira, J. M., K. Matsuno, A. Yamaguchi, T. Hirawake, T. Kikuchi (2017) Abundance, development stage, and size of decapod larvae through the Bering and Chukchi Seas during summer. Polar Biology, 40, 1805-1819. DOI 10.1007/s00300-017-2103-6

Natsuike, M., R. Saito, A. Fujiwara, K. Matsuno, A. Yamaguchi, N. Shiga, T. Hirawake, T. Kikuchi, S. Nishino, I. Imai. (2017) Evidence of increased toxic Alexandrium tamarense dinoflagellate blooms in the eastern Bering Sea in the summers of 2004 and 2005. PLoS ONE, 12(11), e0188565. https://doi.org/10.1371/journal. pone.0188565

平譯 享,高尾信太郎,鈴木光次,西岡 純,渡邉 豊,伊佐田 智規 (2017) 衛星による海洋基礎生産力の推定.海の研究, 26(3), 65-77.

Fujiwara, A., S. Nishino, K. Matsuno, J. Onodera, Y. Kawaguchi, T. Hirawake, K. Suzuki, J. Inoue, T. Kikuchi (2018) Changes in phytoplankton community structure during wind-induced fall bloom on the central Chukchi shelf. Polar Biology (in press).

Hori, M., H. Murakami, R. Miyazaki, Y. Honda, K. Nasahara, K. Kajiwara, T. Y. Nakajima, H. Irie, M. Toratani, T. Hirawake, T. Aoki (2018) GCOM-C data validation plan for land, atmosphere, ocean and cryosphere. Transaction of the Japan Society for Aeronautical and Space Sciences, Aerospace Technology Japan, 16(3), 218-223. DOI: 10.2322/tastj.16.218
担当授業
学部
全学 総合科目 海のふしぎ(分担)
海洋計測学(分担)
衛星海洋学(分担)
海洋資源科学実験III(分担)
水産科学英語II(分担)

大学院
海洋計測学特論Ⅰ
海洋計測学特論Ⅱ
水産科学汎論II
南極学特別実習II
略歴
平成4年3月	東京水産大学水産学部海洋生産学科卒業
平成5年3月	東京水産大学水産専攻科修了
平成7年3月	東京水産大学大学院水産学研究科博士前期課程修了
平成10年3月	東京水産大学大学院水産学研究科博士後期課程退学
平成10年4月	国立極地研究所 南極圏環境モニタリング研究センター 助手
平成16年4月	情報・システム研究機構 国立極地研究所 研究教育系 助手
平成18年4月	国立大学法人 北海道大学大学院水産科学研究院 助教授
平成19年4月	国立大学法人 北海道大学大学院水産科学研究院 准教授
社会貢献
GCOM-C/SGLI利用ワーキンググループ委員
国立極地研究所客員教員
日本海洋学会 「Journal of Oceanography」編集委員
水産海洋学会 「水産海洋研究」編集委員
日本学術会議 地球惑星科学委員会地球惑星科学国際連携分科会IASC小委員会委員
国立極地研究所運営会議南極観測審議委員会 生物圏専門部会 委員
教員からのメッセージ
海洋における食物網の底辺を支えているのは植物プランクトンという小さな生き物です。その種類や有機物生産量の時間変化や場所による違いは極めて大きく、海の環境と密接な関係があります。
現在、地球環境は今までになく急激に変化しつつあり、海洋環境や植物プランクトンへの影響をしっかりと監視することが必要です。しかしながら、海はとても広く、常時船で観測することは難しく、わからないことが沢山あります。本研究室では、衛星データを利用して連続的に広い空間スケールの観測行うことで、今、海で何が起きているのか明らかにすることを目標としています。
また、”衛星の研究室”と言っても、船で現場に行って実際に光のデータや水中の物質量を測定することは、衛星観測にとって重要な仕事です。それらのデータを使い、衛星データが正しいいかどうかを検証したり、新たな衛星パラメータを推定する手法開発も行っています。
北海道大学研究者総覧システムへ
HIRAWAKE Toru
  • Associate Professor of Marine Environmental Science
  • Division of Marine Environment and Resource Sensing
  • Department of Marine Environment and Resource Sensing
Office location
208 Main Building
Email
hirawake[at]fish.hokudai.ac.jp
※ change [at] to @
Phone
+81-138-40-8844
Research Areas
Study on change in ocean primary production using satellite data
Study on change in phytoplankton size/group using satellite data
Relationship among optical properties of seawater, marine environments and primary production
Algorithm development for satellite ocean color sensors
Representative publications
Okamoto, S., T. Hirawake and S. Saitoh (2010) Interannual variability in the magnitude and timing of the spring bloom in the Oyashio region. Deep Sea Research II, 57(17-18), 1608-1617.

Hashihama, F., H. Umeda, C. Hamada, S. Kudoh, T. Hirawake, K. Satoh, M. Fukuchi, and Yasuhiro Kashino (2010) Light acclimation states of phytoplankton in the Southern Ocean, determined using photosynthetic pigment distribution. Marine Biology, 157, 2263-2278.

Koubbi, P., C. Ozouf-Costaz, A. Goarant, M. Moteki, P-A. Hulley, R. Causse, A. Dettai, G. Duhamel, P. Pruvost, E. Tavernier, A. Post, R. J. Beaman, S. Rintoul, T. Hirawake, D. Hirano, T. Ishimaru, M. Riddle, and G. Hosie (2010) Estimating the biodiversity of the East Antarctic shelf and oceanic zone for ecoregionalisation: Example of the ichthyofauna of the CEAMARC (Collaborative East Antarctic Marine Census) CAML surveys. Polar Science, 4(2), 115-133.

Saitoh, S-I., R. Mugo, I. N. Radiarta, S. Asaga, F. Takahashi, T. Hirawake, Y. Ishikawa, T. Awaji, T. In, and S. Shima (2011) Some operational uses of satellite remote sensing and marine GIS for sustainable fisheries and aquaculture. ICES Journal of Marine Science, 68, 687-695.

Hirawake, T., S. Takao, N. Horimoto, T. Ishimaru, Y. Yamaguchi and M. Fukuchi (2011) A phytoplankton absorption-based primary productivity model for remote sensing in the Southern Ocean. Polar Biology, 34, 291-302.

Nishino, S., T. Kikuchi, M. Yamamoto-Kawai, Y. Kawaguchi, T. Hirawake, M. Itoh (2011) Enhancement/reduction of biological pump depends on ocean circulation in the sea-ice reduction regions of the Arctic Ocean. Journal of Oceanography, 67, 305-314.

Matsuno, K., A. Yamaguchi, T. Hirawake, I. Imai (2011) Year-to-year changes of the mesozooplankton community in the Chukchi Sea during summers of 1991, 1992, and 2007, 2008. Polar Biology, 34, 1349-1360.

Fujiwara, A., T. Hirawake, K. Suzuki, S-I. Saitoh (2011) Remote sensing of size structure of phytoplankton communities using optical properties of the Chukchi and Bering Sea shelf region. Biogeosciences, 8, 3567-3580.

Hirawake, T., K. Shinmyo, A. Fujiwara, S. Saitoh (2012) Satellite remote sensing of primary productivity in the Bering and Chukchi Seas using an absorption-based approach. ICES Journal of Marine Science, 69, 1194-1204.

Takao, S., T. Hirawake, S. W. Wright, K. Suzuki (2012) Variations of net primary productivity and phytoplankton community composition in the Indian sector of the Southern Ocean as estimated from ocean color remote sensing data. Biogeosciences, 9, 3875-3890.

Syamsuddin, M. L., S-I. Saitoh, T. Hirawake, S. Bachri, A. B. Harto (2013) Effects of El Niño-Southern Oscillation events on catches of Bigeye Tuna (Thunnus obesus) in the eastern Indian Ocean off Java. Fishery Bulletin, 111, 175-188.

Yamaguchi, A., T. Homma, R. Saito, K. Matsuno, H. Ueno, T. Hirawake, I. Imai (2013) East-west differences in population structure and vertical distribution of copepods along 47˚N in the subarctic Pacific in June 2009. Plankton Benthos Research, 8, 116-123.

Liu, Y., S-I. Saitoh, I. N. Radiarta, T. Isada, T. Hirawake, H. Mizuta, H. Yasui (2013) Improvement of an aquaculture site-selection model for Japanese kelp (Saccharina japonica) in southern Hokkaido, Japan: an application for the impacts of climate events. ICES Journal of Marine Science, doi.10.1093/icesjms/fst108.

Liu, Y., S-I. Saitoh, I. N. Radiarta, H. Igarashi, T. Hirawake (2014) Spatiotemporal variations in suitable areas for Japanese scallop aquaculture in the Dalian coastal area from 2003 to 2012. Aquaculture, 422-423, 172-183.

Fujiwara, A., T. Hirawake, K. Suzuki, I. Imai, S-I. Saitoh (2014) Timing of sea ice retreat can alter phytoplankton community structure in the western Arctic Ocean. Biogeosciences, 11, 1705-1716.

Liu, Y., S-I. Saitoh, H. Igarashi, T. Hirawake (2014) The regional impacts of climate change on coastal environments and the aquaculture of Japanese scallops in northeast Asia: case studies from Dalian, China, and Funka Bay, Japan. International Journal of Remote Sensing, 35, 4422-4440.

Kuma, K., R. Sasayama, N. Hioki, Y. Morita, Y. Isoda, T. Hirawake, K. Imai, T. Aramaki, T. Nakamura, J. Nishioka, N. Ebuchi (2014) Chemical evidence for the origin of the cold water belt along the northeastern coast of Hokkaido. Journal of Oceanography, 70, 377-387.

Hirata, T., T. Hirawake, F. Sakaida, H. Yamaguchi, K. Suzuki, H. Murakami, J. Ishizaka, H. Kobayashi, A. Fujiwara, M. Toratani, S. Saitoh (2014) Development and verification of SGLI/GCOM-C1 ocean algorithms. Journal of the Remote Sensing Society of Japan, 34, 278-285.

Takao, S., T. Hirawake, G. Hashida, H. Sasaki, H. Hattori, K. Suzuki (2014) Phytoplankton community composition and photosynthetic physiology in the Australian sector of the Southern Ocean during the austral summer of 2010/2011. Polar Biology, 37, 1563-1578.

Aura, C. M., S-I. Saitoh, Y. Liu, T. Hirawake, K. Baba, T. Yoshida (2014) Implications of marine environment change on Japanese scallop (Mizuhopecten yessoensis) aquaculture suitability: a comparative study in Funka and Mutsu Bays, Japan. Aquaculture Research, in press.

Isada, T., T. Hirawake, T. Kobayashi, Y. Nosaka, M. Natsuike, I. Imai, K. Suzuki, S-I. Saitoh (2015) Hyperspectral optical discrimination of phytoplankton community structure in Funka Bay and its implications for ocean color remote sensing of diatoms. Remote Sensing of Environment, 159, 134-151.

Liu, Y., S-I. Saitoh, S. Nakada, X. Zhang, T. Hirawake (2015) Impact of oceanographic environmental shifts and atmospheric events on the sustainable development of coastal aquaculture: A case study of kelp and scallops in southern Hokkaido, Japan. Sustainability, 7, 1263-1279.

Matsuno, K., A. Yamaguchi, T. Hirawake, S. Nishino, J. Inoue, T. Kikuchi (2015) Reproductive success of Pacific copepods in the Arctic Ocean and the possibility of changes in the Arctic ecosystem. Polar Biology, 38, 1075-1079.

Nishino, S., Y. Kawaguchi, J. Inoue, T. Hirawake, A. Fujiwara, R. Futsuki, J. Onodera, M. Aoyama (2015) Nutrient supply and biological response to wind-induced mixing, inertial motion, and currents in the northern Chukchi Sea. Journal of Geophysical Research: Oceans, 120, 1975-1992, doi:10.1002/2014JC010407.

Wang, S., J. Ishizaka, T. Hirawake, Y. Watanabe, Y. Zhu, M. Hayashi, S. Yoo (2015) Remote estimation of phytoplankton size fractions using the spectral shape of light absorption. Optics Express, 23, 10301-10318.

Lee, Y. J., et al. (T. Hirawake, one of 25 co-authors in alphabetical order) (2015) An assessment of phytoplankton primary productivity in the Arctic Ocean from satellite ocean color/in situ chlorophyll-a based models, Journal of Geophysical Research: Oceans, 120, 6508-6541, doi: 10.1002/2015JC011018.

Liu, Y., S-I. Saitoh, Y. Ihara, S. Nakada, M. Kanamori, X. Zhang, K. Baba, Y. Ishikawa, and T. Hirawake (2015) Development of a three- dimensional growth prediction model for the Japanese scallop in Funka Bay, Japan, using OGCM and MODIS. ICES Journal of Marine Science, doi: 10.1093/icesjms/fsv153. (Online, in press)

Reynolds, R. A., A. Matsuoka, T. Hirawake, S. Bélanger, and B. G. Mitchell (2015) Ocean Colour Algorithms and Bio-optical Relationships for Polar Seas (Chapter 4) in Ocean Colour Remote Sensing in Polar Seas. Babin, M., Arrigo, K., Bélanger, S. and Forget, M-H. (eds.), IOCCG Report Series, No. 16, International Ocean Colour Coordinating Group, Dartmouth, Canada.

Arrigo, K., V. Hill, S. Bélanger, B. G. Mitchell, T. Hirawake and M. Babin (2015) Estimates of Net Primary Production from Space-based Measurements (Chapter 5)
in Ocean Colour Remote Sensing in Polar Seas. Babin, M., Arrigo, K., Bélanger, S. and Forget, M-H. (eds.), IOCCG Report Series, No. 16, International Ocean Colour Coordinating Group, Dartmouth, Canada

Fujiwara, A., T. Hirawake, K. Suzuki, L. B. Eisner, I. Imai, S. Nishino, T. Kikuchi, and S-I. Saitoh (2016) Influence of timing of sea ice retreat on phytoplankton size during marginal ice zone bloom period in the Chukchi and Bering shelves. Biogeosciences, 13, 115-131.

Nishino, S., T. Kikuchi, A. Fujiwara, T. Hirawake, M. Aoyama (2016) Water mass characteristics and their temporal changes in a biological hotspot in the southern Chukchi Sea. Biogeosciences, 13, 2563-2578.

Alabia, I., S-I. Saitoh, T. Hirawake, H. Igarashi, Y. Ishikawa, N. Usui, M. Kamachi, T. Awaji, M. Seito (2016) Elucidating the potential squid habitat responses in the central North Pacific to the recent ENSO flavors. Hydrobiologia, 772(1), 215-227.

Syamsuddin, M., S-I. Saitoh, T. Hirawake, F. Syamsudin, M. Zainuddin (2016) Interannual variation of bigeye tuna (Thunnus obesus) hotspots in the eastern Indian Ocean off Java. International Journal of Remote Sensing, 37, 2087-2100.

Syah, A. F., S-I. Saitoh, Alabia, I. D., T. Hirawake (2016) Predicting potential fishing zone for Pacific saury (Cololabis saira) with maximum entropy models and remotely sensed data. Fishery Bulletin, 114(3), 330-342.

Matsuno, K., Sanchez, J. M. L., A. Yamaguchi, T. Hirawake, T. Kikuchi (2016) Spatial and geographical changes in the mesozooplankton community in the Bering and Chukchi Seas during the summers of 2007 and 2008. Polar Science, 10, 335-345.

Tanaka, K., N. Takesue, J. Nishioka, Y. Kondo, A. Ooki, K. Kuma, T. Hirawake, Y. Yamashita (2016) The conservative behavior of dissolved organic carbon in surface waters of the southern Chukchi Sea, Arctic Ocean, during early summer. Scientific Report, 6, 34123, doi:10.1038/srep34123.

Kostadinov, T. S., A. Cabré, H. Vedantham, I. Marinov, A. Bracher, R. J.W. Brewin, A. Bricaud, T. Hirata, T. Hirawake, N. J. Hardman-Mountford, C. Mouw, S. Roy, J. Uitz (2016) Inter-comparison of phytoplankton functional type phenology metrics derived from ocean color algorithms and Earth System Models. Remote Sensing of Environment, 190, 162-177.

Natsuike, M., K. Matsuno, T. Hirawake, A. Yamaguchi, S. Nishino, I. Imai (2017) Possible spreading of toxic Alexandrium tamarense blooms on the Chukchi Sea shelf with the inflow of Pacific summer water due to climatic warming. Harmful Algae, 61, 80-86.

Mouw, Colleen B., Nick J. Hardman-Mountford, Severine Alvain, Astrid Bracher, Robert W. Brewin, Annick Bricaud, Aurea M. Ciotti, Emmanuel Devred, Amane Fujiwara, Takafumi Hirata, Toru Hirawake, Tihomir S. Kostadinov, Shovonlal Roy, Julia Uitz (2017) A Consumer’s Guide to Satellite Remote Sensing of Multiple Phytoplankton Groups in the Global Ocean. Frontiers in Marine Science, 4:41, doi: 10.3389/fmars.2017.00041.

Waga, H., T. Hirawake, A. Fujiwara, T. Kikuchi, S. Nishino, K. Suzuki, S. Takao, S-I. Saitoh (2017) Differences in Rate and Direction of Shifts between Phytoplankton Size Structure and Sea Surface Temperature. Remote Sensing, 9, 222, doi:10.3390/rs9030222.

Zhang, X., S-I. Saitoh, and T. Hirawake (2017) Predicting potential fishing zones of Japanese Common Squid (Todarodes Pacificus) using remotely sensed images in coastal waters of south-western Hokkaido, Japan. International Journal of Remote Sensing, 38 (21), 6129-6146. DOI: 10.1080/01431161.2016.1266114.

Isada, T., T. Hirawake, S. Nakada, T. Kobayashi, K. Sasaki, Y. Tanaka, S. Watanabe, K. Suzuki, S-I. Saitoh (2017) Influence of hydrography on the spatiotemporal variability of phytoplankton assemblages and primary productivity in Funka Bay and the Tsugaru Strait. Estuarine, Coastal and Shelf Science, 188, 199-211.

Landeira, J. M., K. Matsuno, A. Yamaguchi, T. Hirawake, T. Kikuchi (2017) Abundance, development stage, and size of decapod larvae through the Bering and Chukchi Seas during summer. Polar Biology, 40, 1805-1819. DOI 10.1007/s00300-017-2103-6

Natsuike, M., R. Saito, A. Fujiwara, K. Matsuno, A. Yamaguchi, N. Shiga, T. Hirawake, T. Kikuchi, S. Nishino, I. Imai. (2017) Evidence of increased toxic Alexandrium tamarense dinoflagellate blooms in the eastern Bering Sea in the summers of 2004 and 2005. PLoS ONE, 12(11), e0188565. https://doi.org/10.1371/journal. pone.0188565

Fujiwara, A., S. Nishino, K. Matsuno, J. Onodera, Y. Kawaguchi, T. Hirawake, K. Suzuki, J. Inoue, T. Kikuchi (2018) Changes in phytoplankton community structure during wind-induced fall bloom on the central Chukchi shelf. Polar Biology (in press).

Hori, M., H. Murakami, R. Miyazaki, Y. Honda, K. Nasahara, K. Kajiwara, T. Y. Nakajima, H. Irie, M. Toratani, T. Hirawake, T. Aoki (2018) GCOM-C data validation plan for land, atmosphere, ocean and cryosphere. Transaction of the Japan Society for Aeronautical and Space Sciences, Aerospace Technology Japan, 16(3), 218-223. DOI: 10.2322/tastj.16.218
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