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Title	en Low ocean-floor rises regulate subpolar sea surface temperature by forming baroclinic jets
Creator	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.
Accessrights	open access
Rights	http://creativecommons.org/licenses/by/4.0/ en Creative Commons Attribution 4.0 International
Subject	NDC 452
Description	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.
Publisher	en Nature Publishing Group
Date	Issued2018-03-22
Language	eng
Resource Type	journal article
Version Type	VoR
Identifier	HDL http://hdl.handle.net/2115/70589
Relation	isIdenticalTo DOI https://doi.org/10.1038/s41467-018-03526-z
Journal	PISSN 2041-1723 en Nature communications Volume Number9 Page Start1190
File	fulltext naturecommunications9_1190.pdf 6.14 MB (application/pdf) Issued2018-03-22
Oaidate	2023-07-26