Wind-driven intensification of the Tsushima Warm Current along the Japanese coast detected by sea level difference in the summer monsoon of 2013

Tetsutaro Takikawa, Toshiteru Watanabe, Tomoharu Senjyu, Akihiko Morimoto

研究成果: Contribution to journalArticle査読

3 被引用数 (Scopus)

抄録

This study found an unusually large variation in the coastal sea level difference (SLD) in the southwestern Japan Sea from July to October 2013. The time and horizontal scales were about 4 months and 1000 km along the coast, respectively. During the exceptionally hot summer of 2013, strong monsoon winds blew through the Tsushima Straits into the southwestern Japan Sea, because the North Pacific High was located farther west than average. The southwesterly winds averaged 7 m s−1 parallel to the coast in July 2013, resulting in Ekman transport toward the coast. The most noticeable SLD was measured between Omijima and Mishima, normal to the 250 km rectilinear coastal line. The velocity of the first branch of the Tsushima Warm Current increased to about 50 cm s−1 between Omijima and Mishima from late July to early August. Although the SLD seemed to simultaneously increase and decrease along the Japanese coast with large time scale, the variation in coastal SLD propagated along the Japanese coast, reaching Niigata-nishi in the eastern Japan Sea. The propagation speed in the wide continental shelf of the southern Japan Sea was much higher than that in the narrow eastern shelf, which was consistent with the behavior of continental shelf waves.

本文言語英語
ページ(範囲)271-277
ページ数7
ジャーナルContinental Shelf Research
143
DOI
出版ステータス出版済み - 7 1 2017
外部発表はい

All Science Journal Classification (ASJC) codes

  • 海洋学
  • 水圏科学
  • 地質学

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