Kuroshio surface water intrusion into the eastern part of the transition domain: its pathways and decadal variations

Matsuta, Takuro; Mitsudera, Humio; Miyama, Toru; Tomita, Hiroyuki

Kuroshio surface water intrusion into the eastern part of the transition domain: its pathways and decadal variations

Matsuta, Takuro; Mitsudera, Humio; Miyama, Toru et al.

Journal of oceanography, 2025, 81, 393-412

Permalink : https://hdl.handle.net/2115/97816

このアイテムのアクセス数:28件（2026-07-12 15:27 集計）

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アクセス権	open access
URI	https://hdl.handle.net/2115/97816
タイトル	Kuroshio surface water intrusion into the eastern part of the transition domain: its pathways and decadal variations
著者	Matsuta, Takuro ; Mitsudera, Humio ; Miyama, Toru ; Tomita, Hiroyuki
e-Rad_Researcher 90974121 著者名 Matsuta, Takuro
e-Rad_Researcher 20360943 著者名 Mitsudera, Humio
e-Rad_Researcher 80358770 著者名 Miyama, Toru
e-Rad_Researcher 10435844 著者名 Tomita, Hiroyuki
言語	英語
キーワード	Kuroshio Extension
	Kuroshio water intrusion
	Eddy transport
	North Pacific transition domain
発行日	2025-05-17
出版者	Springer
収録物名	Journal of oceanography
巻(号)	81
ページ	393-412
抄録	The quasi-stationary jets, called "J1" and "J2" in the western North Pacific Ocean, transport the warm and salty waters originating from the Kuroshio and form the transition domain (TD) between the subtropical and subarctic features. Although previous studies have revealed the Kuroshio water pathways from the Kuroshio Extension to the western part of the TD through J1, the pathways to the eastern part of the TD (ETD) have not been revealed yet. We use the backward particle-tracking method to evaluate the Kuroshio water pathways from the Kuroshio Extension to the ETD. Our results identify that the Kuroshio Extension Northern Branch is the dominant pathway. The subarctic Front, the main jet of the Kuroshio Extension, and J1 also contribute to the Kuroshio water intrusion with the aid of eddy transports. We also find that the Kuroshio water intrusion affects the decadal sea surface temperature and surface heat flux variations. When the Kuroshio water intrusion is enhanced, the heat transport into the transition domain from the Kuroshio Extension and the heat release to the atmosphere from the transition domain are enhanced. The decadal variation of Kuroshio water intrusion correlates with the J2 strength and not with the Kuroshio Extension latitude. Using the Hilbert Empirical Orthogonal Function, we show that the remote force in the Gulf of Alaska and the central North Pacific Ocean possibly drives the decadal variation of J2 strength. In addition to this remote mechanism, the geostrophic anomalies forced by the local wind stress anomalies are also important.
資源タイプ	学術雑誌論文
出版タイプ	Accepted Manuscript
権利情報	This version of the article has been accepted for publication, after peer review (when applicable) and is subject to Springer Nature’s AM terms of use, but is not the Version of Record and does not reflect post-acceptance improvements, or any corrections. The Version of Record is available online at: http://dx.doi.org/10.1007/s10872-025-00760-0
PISSN	0916-8370
EISSN	1573-868X
関連情報 (isVersionOf)	出版社版DOI https://doi.org/10.1007/s10872-025-00760-0