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The Kuroshio flowing over seamounts and associated submesoscale flows drive 100-km-wide 100-1000-fold enhancement of turbulence
https://oacis.repo.nii.ac.jp/records/2219
https://oacis.repo.nii.ac.jp/records/221992514a54-7d4c-422f-b753-562d85af1c90
Item type | 学術雑誌論文 / Journal Article(1) | |||||
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公開日 | 2021-09-21 | |||||
タイトル | ||||||
タイトル | The Kuroshio flowing over seamounts and associated submesoscale flows drive 100-km-wide 100-1000-fold enhancement of turbulence | |||||
言語 | ||||||
言語 | eng | |||||
資源タイプ | ||||||
資源タイプ | journal article | |||||
アクセス権 | ||||||
アクセス権 | metadata only access | |||||
著者 |
Nagai, Takeyoshi
× Nagai, Takeyoshi× Hasegawa, Daisuke× Tsutsumi, Eisuke× Nakamura, Hirohiko× Nishina, Ayako× Senjyu, Tomoharu× Endo, Takahiro× Matsuno, Takeshi× Inoue, Ryuichiro× Tandon, Amit |
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書誌情報 |
Communications earth & environment 巻 2, 発行日 2021-08-23 |
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抄録 | ||||||
内容記述 | Although previous studies reported that currents over topographic features, such as seamounts and ridges, cause strong turbulence in close proximity, it has been elusive how far intense turbulence spreads toward the downstream. Here, we conducted a series of intensive in-situ turbulence observations using a state-of-the-art tow-yo microstructure profiler in the Kuroshio flowing over the seamounts of the Tokara Strait, south of Kyusyu Japan, in November 2017, June 2018, and November 2019, and employed a high-resolution numerical model to elucidate the turbulence generation mechanisms. We find that the Kuroshio flowing over seamounts generates streaks of negative potential vorticity and near-inertial waves. With these long-persisting mechanisms in addition to other near-field mixing processes, intense mixing hotspots are formed over a 100-km scale with the elevated energy dissipation by 100- to 1000-fold. The observed turbulence could supply nutrients to sunlit layers, promoting phytoplankton primary production and CO2 uptake. | |||||
DOI | ||||||
識別子タイプ | DOI | |||||
関連識別子 | https://doi.org/10.1038/s43247-021-00230-7 | |||||
情報源 | ||||||
関連識別子 | https://doi.org/10.1038/s43247-021-00230-7 | |||||
関連名称 | Publisher's Version/PDF (OpenAccess) | |||||
情報源 | ||||||
関連識別子 | https://kaken.nii.ac.jp/ja/search/?kw=19H01965 | |||||
関連名称 | KAKEN研究課題: 二台同時自由落下曳航観測手法を用いたマルチスケール混合現象とその影響に関する研究 | |||||
情報源 | ||||||
関連識別子 | https://kaken.nii.ac.jp/ja/grant/KAKENHI-PUBLICLY-16H01590/ | |||||
関連名称 | KAKEN研究課題: 黒潮源流が陸棚縁で生成する近慣性内部波と躍層における鉛直混合メカニズムの解明 | |||||
情報源 | ||||||
関連識別子 | https://kaken.nii.ac.jp/ja/grant/KAKENHI-PUBLICLY-18H04914/ | |||||
関連名称 | KAKEN研究課題: 沖縄トラフ・トカラ海峡で高鉛直波数近慣性波シアと乱流が卓越するメカニズム | |||||
情報源 | ||||||
関連識別子 | 研究代表者: 長井 健容 (東京海洋大学) | |||||
関連名称 | 研究代表者: 長井 健容 (東京海洋大学) | |||||
情報源 | ||||||
関連識別子 | https://www.nature.com/ | |||||
関連名称 | Nature | |||||
件名 | ||||||
主題 | 科学研究費研究成果 | |||||
出版者 | ||||||
出版者 | Springer Nature | |||||
科学研究費研究課題 | ||||||
主題 | 二台同時自由落下曳航観測手法を用いたマルチスケール混合現象とその影響に関する研究 | |||||
科学研究費研究課題 | ||||||
主題 | Resolving multi-scale mixing processes and their impacts using a twin tow-yo microstructure profiling system | |||||
科学研究費研究課題 | ||||||
主題 | 黒潮源流が陸棚縁で生成する近慣性内部波と躍層における鉛直混合メカニズムの解明 | |||||
科学研究費研究課題 | ||||||
主題 | Near-inertial wave generations and diapycnal mixing in the Kuroshio origin regions near the continental shelf | |||||
科学研究費研究課題 | ||||||
主題 | 沖縄トラフ・トカラ海峡で高鉛直波数近慣性波シアと乱流が卓越するメカニズム | |||||
科学研究費研究課題 | ||||||
主題 | Mechanisms of dominant vertical high wavenumber near inertial shear and strong turbulence in the Okinawa Trough and the Tokara Strait | |||||
研究課題番号 | ||||||
内容記述 | 19H01965 | |||||
研究課題番号 | ||||||
内容記述 | 16H01590 | |||||
研究課題番号 | ||||||
内容記述 | 18H04914 |