Temporal and spatial variations of oceanic submesoscales induced by mixed layer instabilities in the Kuroshio Extension region
| Project/Area Number |
25400473
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Meteorology/Physical oceanography/Hydrology
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| Research Institution | Japan Agency for Marine-Earth Science and Technology |
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Principal Investigator |
SASAKI Hideharu 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, 主任研究員 (50359220)
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| Co-Investigator(Kenkyū-buntansha) |
SASAI Yoshikazu 国立研究開発法人海洋研究開発機構, 地球環境観測研究開発センター, グループリーダ代理 (40419130)
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| Project Period (FY) |
2013-04-01 – 2016-03-31
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| Project Status |
Completed (Fiscal Year 2015)
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| Budget Amount *help |
¥4,810,000 (Direct Cost: ¥3,700,000、Indirect Cost: ¥1,110,000)
Fiscal Year 2015: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2014: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2013: ¥3,120,000 (Direct Cost: ¥2,400,000、Indirect Cost: ¥720,000)
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| Keywords | 海洋循環場 / サブメソスケール / スケール間相互作用 / 時空間変動 / 海洋サブメソスケール現象 / エネルギー逆カスケード / 季節変動 / 海洋サブメソスケール / 高解像度海洋シミュレーション / 海洋生態系 |
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| Outline of Final Research Achievements |
The outputs from the North Pacific high-resolution ocean simulation at horizontal resolution of 3km were used to investigate oceanic submesoscale structures with the scale from several km to several ten km. The simulation demonstrated seasonality of submesoscales, active in winter, in the Northwestern Pacific. The rich winter submesoscales are induced by the mixed layer instabilities. The temporal-spatial variations should be diagnostically observed by the high-resolution sea surface height based on the geostrophic theory. In addition, large inverse kinetic energy cascade from small scales to large scales were observed in winter, but not in summer. This result suggests large impact of submesoscales on temporal and spatial variations of larger scale oceanic fields.
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Report
(4 results)
Research Products
(22 results)
