Low ocean-floor rises regulate subpolar sea surface temperature by forming baroclinic jets

Mitsudera Humio; Miyama T.; Nishigaki H.; Nakanowatari T.; Nishikawa H.; Nakamura Tomohiro; Wagawa T.; Furue R.; Fujii Y.; Ito S.

タイトル	en Low ocean-floor rises regulate subpolar sea surface temperature by forming baroclinic jets
作成者	en Mitsudera, Humio NRID 1000020360943 en Miyama, T. en Nishigaki, H. en Nakanowatari, T. en Nishikawa, H. en Nakamura, Tomohiro NRID 1000060400008 en Wagawa, T. en Furue, R. en Fujii, Y. en Ito, S.
アクセス権	open access
権利情報	http://creativecommons.org/licenses/by/4.0/ en Creative Commons Attribution 4.0 International
主題	NDC 452
内容注記	Abstract en Sea surface temperature (SST) fronts in mid-to high-latitude oceans have significant impacts on extratropical atmospheric circulations and climate. In the western subarctic Pacific, sharp SST fronts form between the cold subarctic water and the recently found quasi-stationary jets that advect warm waters originating in the Kuroshio northeastward. Here we present a new mechanism of the jet formation paying attention to the propagation of baroclinic Rossby waves that is deflected by eddy-driven barotropic flows over bottom rises, although their height is low (similar to 500 m) compared with the depth of the North Pacific Ocean (similar to 6000 m). Steered by the barotropic flows, Rossby waves bring a thicker upper layer from the subtropical gyre and a thinner upper layer from the subarctic gyre, thereby creating a thickness jump, hence a surface jet, where they converge. This study reveals an overlooked role of low-rise bottom topography in regulating SST anomalies in subpolar oceans.
出版者	en Nature Publishing Group
日付	Issued2018-03-22
言語	eng
資源タイプ	journal article
出版タイプ	VoR
資源識別子	HDL http://hdl.handle.net/2115/70589
関連	isIdenticalTo DOI https://doi.org/10.1038/s41467-018-03526-z
収録誌情報	PISSN 2041-1723 en Nature communications 巻9 開始ページ1190
ファイル	fulltext naturecommunications9_1190.pdf 6.14 MB (application/pdf) Issued2018-03-22
コンテンツ更新日時	2023-07-26