Ekman-pumping forced model: Basic concept and implementation for causality understanding of tropical ocean variability

• Project/Area Number: 26610146
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Meteorology/Physical oceanography/Hydrology
• Research Institution: Hokkaido University
• Principal Investigator: Minobe Shoshiro 北海道大学, 理学研究院, 教授 (70219707)
• Co-Investigator(Kenkyū-buntansha): 小守 信正 国立研究開発法人海洋研究開発機構, アプリケーションラボ, 主任技術研究員 (80359223)
• Project Period (FY): 2014-04-01 – 2018-03-31
• Project Status: Completed (Fiscal Year 2017)
• Budget Amount: ¥3,770,000 (Direct Cost: ¥2,900,000、Indirect Cost: ¥870,000); Fiscal Year 2016: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000); Fiscal Year 2015: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000); Fiscal Year 2014: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
• Keywords: エクマンパンピング / アジョイント / 熱帯海洋 / 領域駆動実験 / 熱帯インド洋 / 季節内変動 / 赤道ロスビー波 / 赤道太平洋 / 風応力 / インドネシア通過流 / ニンガルー・ニーニョ

Outline of Final Research Achievements

Ekman pumping is a fundamental tool for understanding the causality in ocean variability except for the equator, where Ekman pumping becomes infinity. We have solved this difficulty by proposing and producing Ekman-pumping forced model for the first time and its adjuring backward integration version. By conducting a series of numerical experiments, we have found that off-equatorial Ekman pumping contribute more strongly in the Indian Ocean rather than in the Pacific Ocean for the equatorial upper layer thickness variability. Also, off-equatorial Ekman pumping contributes more for large-magnitude events of Indian Ocean dipole mode than for small magnitude events.

Research Products

• [Int'l Joint Research] ハワイ大学(米国)
• [Int'l Joint Research] アメリカ海洋大気庁/ウィスコンシン大学/アメリカ大気研究センター(米国)
• [Journal Article] Upper Ocean O2 trends: 1958-2015 (2017)
  • Author(s): Takamitsu Ito, Shoshiro Minobe, Matthew C. Long, Curtis Deutsch
  • Journal Title: Geophysical Research Letters Volume: 印刷中 Issue: 9 Pages: 4214-4223
  • DOI: 10.1002/2017gl073613
  • Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] 全球大気海洋結合モデルを用いた実験的アンサンブル大気再解析 (2017)
  • Author(s): 小守 信正、榎本 剛、三好 建正、山崎 哲、吉田 聡、田口 文明
  • Journal Title: 月刊 海洋 Volume: 59 Pages: 93-97
• [Journal Article] Western Boundary Sea Level: A Theory, Rule of Thumb, and Application to Climate Models (2017)
  • Author(s): Minobe, S., M. Terada, B. Qiu, N. Schneider
  • Journal Title: Journal of Physical Oceanography Volume: 47 Issue: 5 Pages: 957-977
  • DOI: 10.1175/jpo-d-16-0144.1
  • NAID: 120006360077
  • Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] Dynamical downscaling of future sea-level change in the western North Pacific using ROMS (2016)
  • Author(s): Zhao-Jun Liu, Shoshiro Minobe, Yoshi N. Sasaki, Mio Terada
  • Journal Title: Journal of Oceanography Volume: 72 Issue: 6 Pages: 905-922
  • DOI: 10.1007/s10872-016-0390-0
  • NAID: 120006366473
  • Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] The Pacific Decadal Oscillation, Revisited (2016)
  • Author(s): Matthew Newman, Michael A. Alexander, Toby R. Ault, Kim M. Cobb, Clara Deser, Emanuele Di Lorenzo, Nathan J. Mantua, Arthur J. Miller, Shoshiro Minobe, Hisashi Nakamura, Niklas Schneider, Daniel J. Vimont, Adam S. Phillips, James D. Scott2, and Catherine A. Smith
  • Journal Title: Journal of Climat Volume: 印刷中 Issue: 12 Pages: 4399-4427
  • DOI: 10.1175/jcli-d-15-0508.1
  • Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
• [Presentation] Experimental seasonal climate prediction using CFES: Preliminary results (2018)
  • Author(s): Nobumasa Komori, Bunmei Taguchi, Akira Kuwano-Yoshida, Takeshi Doi, Masami Nonaka
  • Organizer: 2018 Ocean Sciences Meeting
  • Int'l Joint Research
• [Presentation] Intraseasonal variability of upwelling in the equatorial Indian Ocean (2017)
  • Author(s): Chorong Lee, Shoshiro Minobe, Yoshi N. Sasaki
  • Organizer: Meeting on Perspectives in Computational Atmosphere and Ocean Science and 8th OFES International Workshop
  • Place of Presentation: 名古屋大学（愛知県・名古屋市）
  • Year and Date: 2017-03-13
  • Int'l Joint Research
• [Presentation] Causality linkages in atmosphere, ocean and marine ecosystem over the North Pacific: Modes, processes and prediction (2017)
  • Author(s): Shoshiro Minobe
  • Organizer: International symposium “Drivers of dynamics of small pelagic fish resources
  • Place of Presentation: Victoria (Canada)
  • Year and Date: 2017-03-06
  • Int'l Joint Research / Invited
• [Presentation] Experimental seasonal climate prediction using CFES: Preliminary results (2017)
  • Author(s): Nobumasa Komori, Bunmei Taguchi, Akira Kuwano-Yoshida, Takeshi Doi, Masami Nonaka
  • Organizer: JpGU-AGU Joint Meeting 2017
  • Int'l Joint Research
• [Presentation] 全球大気海洋結合モデルCFESを用いた実験的季節予測システムの開発 (2017)
  • Author(s): 小守信正、田口文明、吉田聡、土井威志、野中正見
  • Organizer: 日本海洋学会2017年度秋季大会
• [Presentation] 全球大気海洋結合モデルCFESを用いた実験的季節予測システムの開発 (2017)
  • Author(s): 小守信正、田口文明、吉田聡、土井威志、野中正見
  • Organizer: 京都大学防災研究所 一般研究集会「様々な結合過程がもたらす異常気象の実態とそのメカニズム」
• [Presentation] CMIP5モデルにおいて東部熱帯太平洋の湧昇流に将来変化をもたらすメカニズム (2017)
  • Author(s): 寺田美緒，見延庄士郎
  • Organizer: 2017年度日本海洋学会秋季大会
• [Presentation] 上層全球海洋の溶存酸素トレンド (2017)
  • Author(s): Takamitsu Ito, 見延 庄士郎， Matthew C. Long, Curtis Deutsch
  • Organizer: 日本海洋学会2017年度秋季大会
• [Presentation] Ensemble-based experimental atmospheric analysis using a global coupled atmosphere-ocean GCM (2016)
  • Author(s): Nobumasa Komori, Takeshi Enomoto, Takemasa Miyoshi, Akira Yamazaki, Akira Kuwano-Yoshida, Bunmei Taguchi
  • Organizer: CLIVAR 2016 Open Science Conference
  • Place of Presentation: Qingdao（中国）
  • Year and Date: 2016-09-20
  • Int'l Joint Research
• [Presentation] 西岸境界における海面高度－理論とRule of Thumb－ (2016)
  • Author(s): 見延 庄士郎，Bo Qiu, Niklas Schneider
  • Organizer: 日本海洋学会秋季大会
  • Place of Presentation: 鹿児島大学（鹿児島県・鹿児島市）
  • Year and Date: 2016-09-13
• [Presentation] 熱帯海洋でのエクマン・パンピング駆動モデルIV: アジョイント後方積分版を用いた感度解析 (2016)
  • Author(s): 小守 信正、見延 庄士郎
  • Organizer: 2016年度日本海洋学会秋季大会
  • Place of Presentation: 鹿児島大学郡元キャンパス（鹿児島県・鹿児島市）
  • Year and Date: 2016-09-12
• [Presentation] Ensemble-based experimental atmospheric analysis using a global coupled atmosphere-ocean GCM (2016)
  • Author(s): Nobumasa Komori, Takeshi Enomoto, Takemasa Miyoshi, Akira Yamazaki, Akira Kuwano-Yoshida, Bunmei Taguchi
  • Organizer: 5th International Symposium on Data Assimilation
  • Place of Presentation: Reading（英国）
  • Year and Date: 2016-07-17
  • Int'l Joint Research
• [Presentation] 熱帯海洋でのエクマン・ パンピング駆動モデルIIIインド洋・太平洋相互作用 (2016)
  • Author(s): 見延 庄士郎
  • Organizer: 日本海洋学会春季大会
  • Place of Presentation: 東京大学（東京都文京区）
  • Year and Date: 2016-03-16
• [Presentation] A preliminary results of Indian Ocean Dipole in 2015 (2016)
  • Author(s): 李チョロン・見延庄士郎・佐々木克徳
  • Organizer: 日本海洋学会春季大会
  • Place of Presentation: 東京大学（東京都文京区）
  • Year and Date: 2016-03-15
• [Presentation] The Pacific Decadal Oscillation, revisited (2016)
  • Author(s): Matthew Newman, Arthur Miller, Michael Alexander, Toby Ault, Kim Cobb, Clara Deser, Emanuele Di Lorenzo, Nathan Mantua, Shoshiro Minobe, Hisashi Nakamura, Niklas Schneider, Daniel Vimont, Adam Phillips, Catherine Smith, James Scott
  • Organizer: 2016 Ocean Sciences Meeting
  • Place of Presentation: ニューオリンズ（米国）
  • Year and Date: 2016-02-23
  • Int'l Joint Research
• [Presentation] Ensemble-based experimental atmospheric reanalysis using a global coupled atmosphere-ocean GCM. (2016)
  • Author(s): Nobumasa Komori, Takeshi Enomoto, Takemasa Miyoshi, Akira Yamazaki, Akira Kuwano-Yoshida, Bunmei Taguchi
  • Organizer: 2016 Ocean Sciences Meeting
  • Place of Presentation: ニューオーリンズ（米国）
  • Year and Date: 2016-02-22
  • Int'l Joint Research
• [Presentation] Sea Level Variations Associated with Indian Ocean Dipole in the Bay of Bengal (2015)
  • Author(s): Chorong Lee
  • Organizer: 18th SNU-HU joint symposium “Toward understanding of changeing environment”
  • Place of Presentation: ソウル（韓国）
  • Year and Date: 2015-11-27
  • Int'l Joint Research
• [Presentation] Vertical mixing due to double diffusion in the tropical western Pacific (2015)
  • Author(s): Chorong Lee・Kyung-Il Chang・Jae Hak Lee・Kelvin J. Richards
  • Organizer: 日本海洋学会秋季大会
  • Place of Presentation: 愛媛大学（松山市・愛媛県）
  • Year and Date: 2015-09-18
• [Presentation] The Pacific decadal oscillation, revisited (2015)
  • Author(s): M. Newman, M. Alexander, T. Ault, K. Cobb, C. Deser, E. DiLorenzo, N. Mantua, A. Miller, S. Minobe, H. Nakamura, N. Schneider, D. Vimont
  • Organizer: 26th IUGG General Assembly 2015
  • Place of Presentation: プラハ（チェコ）
  • Year and Date: 2015-06-24
  • Int'l Joint Research
• [Presentation] Spatio-temporal structure of upwelling in an eddy resolving quasi-global GCM (2015)
  • Author(s): Shoshiro Minobe
  • Organizer: 3rd International Symposium, Effects of Climate Change on the World's Oceans
  • Place of Presentation: Mendes Hotel, Santos, (Brazil)
  • Year and Date: 2015-03-21
• [Presentation] The Pacific Decadal Oscillation, Revisited (2015)
  • Author(s): Matthew Newman, M. Alexander, T. Ault, K. M. Cobb, C. Deser, E. Di Lorenzo, N. J. Mantua, A. J. Miller, S. Minobe, H. Nakamura, N. Schneider, and D. J. Vimont
  • Organizer: 95th American Meteorological Society Annual Meeting
  • Place of Presentation: Phoenix Convention Center, Phoenix, (USA)
  • Year and Date: 2015-01-07
• [Presentation] 全球大気海洋結合モデルを用いたアンサンブルデータ同化システムの開発 (2014)
  • Author(s): 小守信正, 榎本剛, 三好建正, 山崎哲, 吉田聡, 田口文明
  • Organizer: 日本気象学会2014年度秋季大会
  • Place of Presentation: 福岡国際会議場（福岡市）
  • Year and Date: 2014-10-23
• [Presentation] 全球大気海洋結合モデルを用いたアンサンブルデータ同化システムの開発 (2014)
  • Author(s): 小守信正, 榎本剛, 三好建正, 山崎哲, 田口文明
  • Organizer: 2014年度日本海洋学会秋季大会
  • Place of Presentation: 長崎大学 文教キャンパス（長崎市）
  • Year and Date: 2014-09-16
• [Presentation] 海洋物理学のフロンティアと未来への試み (2014)
  • Author(s): 見延 庄士郎
  • Organizer: 日本海洋学会2014年度秋季大会
  • Place of Presentation: 長崎大学文教キャンパス（長崎市）
  • Year and Date: 2014-09-15
  • Invited
• [Presentation] Development of an ensemble-based data assimilation system with a coupled atmosphere-ocean GCM (2014)
  • Author(s): N. Komori, T. Enomoto, T. Miyoshi, A. Yamazaki, and B. Taguchi
  • Organizer: AOGS 11th Annual Meeting
  • Place of Presentation: ロイトン札幌（北海道）
  • Year and Date: 2014-07-30
• [Presentation] Development of an ensemble-based data assimilation system with a coupled atmosphere-ocean GCM (2014)
  • Author(s): N. Komori, T. Enomoto, T. Miyoshi, A. Yamazaki, and B. Taguchi
  • Organizer: 日本地球惑星科学連合2014年大会
  • Place of Presentation: パシフィコ横浜（神奈川県）
  • Year and Date: 2014-04-29
• [Presentation] Secular nutrient changes in observation and numerical modeling in the western North Pacific in the last 50-years (2014)
  • Author(s): Shoshiro Minobe, Curtis Deutsch, Yutaka Hosoya and Hartmut Frenzel
  • Organizer: 2014 PICES FUTURE OPEN SCIENCE MEETING
  • Place of Presentation: Hapuna Beach Prince Hotel, (USA)
  • Year and Date: 2014-04-16