Long-term observation of the Soya Warm Current using HF ocean radars: relationship between the Soya Warm Current variability and the sea level anomalies in the Soya/La Perouse Strait

Ebuchi, Naoto; Fukamachi, Yasushi; Ohshima, Kay I.; Mitsudera, Humio; Nishioka, Jun; Takatsuka, Toru; Ono, Kazuya; Ishikawa, Masao; Daibo, Takaharu; Shirasawa, Kunio; Wakatsuchi, Masaaki

Long-term observation of the Soya Warm Current using HF ocean radars: relationship between the Soya Warm Current variability and the sea level anomalies in the Soya/La Perouse Strait

Ebuchi, Naoto; Fukamachi, Yasushi; Ohshima, Kay I. et al.

Journal of oceanography, 2024

Permalink : https://hdl.handle.net/2115/95348

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アクセス権	open access
URI	https://hdl.handle.net/2115/95348
タイトル	Long-term observation of the Soya Warm Current using HF ocean radars: relationship between the Soya Warm Current variability and the sea level anomalies in the Soya/La Perouse Strait
著者	Ebuchi, Naoto ; Fukamachi, Yasushi ; Ohshima, Kay I. ; Mitsudera, Humio ; Nishioka, Jun ; Takatsuka, Toru ; Ono, Kazuya ; Ishikawa, Masao ; Daibo, Takaharu ; Shirasawa, Kunio ; Wakatsuchi, Masaaki
e-Rad_Researcher 10203655 著者名 Ebuchi, Naoto
著者名 Fukamachi, Yasushi
e-Rad_Researcher 30185251 著者名 Ohshima, Kay I.
e-Rad_Researcher 20360943 著者名 Mitsudera, Humio
e-Rad_Researcher 90371533 著者名 Nishioka, Jun
著者名 Takatsuka, Toru
e-Rad_Researcher 40396320 著者名 Ono, Kazuya
著者名 Ishikawa, Masao
著者名 Daibo, Takaharu
著者名 Shirasawa, Kunio
著者名 Wakatsuchi, Masaaki
言語	英語
キーワード	HF ocean radar
	Soya Warm Current
	Soya/La Perouse Strait
	Sea of Okhotsk
	Coastal boundary current
発行日	2024-05-23
出版者	Springer
収録物名	Journal of oceanography
抄録	Three high-frequency (HF) ocean radars were installed at the Soya/La Perouse Strait to monitor the surface current fields of the Soya Warm Current (SWC), which flows through the strait from the Sea of Japan to the Sea of Okhotsk. These ocean radars were operated for 19 years, from August 2003 to March 2022. In this paper, seasonal to interannual variations in the SWC were investigated using surface current fields obtained by the HF ocean radars combined with coastal tide gauge records and sea level anomaly from satellite altimetry. The HF ocean radars clearly captured the seasonal and interannual variations in the SWC. The alongshore surface velocity of SWC showed a high correlation with the alongshore sea level difference (SLD) between the Sea of Japan and the Sea of Okhotsk if seasonal variations were included. However, anomalies of the SLD and SWC alongshore velocity exhibited a lower correlation, especially in summer. This suggests that different mechanisms may be involved in summer and winter. The alongshore SLD between Wakkanai and Abashiri, which has been utilized in previous studies as an indicator of SWC intensity, may not be appropriate for representing interannual variations in the SWC intensity in summer, when the SWC reaches the maximum current velocity. Instead, it was demonstrated that the offshore SLD anomaly estimated using satellite altimetry with the coastal tide gauge record at Wakkanai could be a better index for representing the interannual variations throughout the year.
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/s10872-024-00724-w
PISSN	0916-8370
関連情報 (isVersionOf)	出版社版DOI https://doi.org/10.1007/s10872-024-00724-w