Intensification of current in coastal waters around Cape Echizen in summer

Atsushi Kaneda, Kouta Ayukawa, Naoki Hirose, Tomoharu Senjyu, Yutaka Kumaki, Yosuke Igeta, Ken ichi Fukudome, Tatsuro Watanabe

Research output: Contribution to journalArticle

Abstract

In the coastal areas of Wakasa Bay, the Japan Sea—an observation network for fisheries and a simulation system of coastal currents with a high-resolution numerical model—revealed intensification of current in summer around Cape Echizen. The 2012–2014 current data collected by mooring observations off Takasu, near Cape Echizen, showed that the current’s speed exceeded 40 cm s −1 for more than 5 days around July and August each year. In addition, the 2014 current data collected by a research vessel indicated that the first branch of the Tsushima Warm Current (FBTWC) flowed near the coast when the strong current with an increase of water temperature occurred in the upper layer of coastal waters off Takasu. Similarly, the simulation results revealed that the FBTWC variability caused intensification of the current in coastal waters near Cape Echizen. In addition, they showed that when the strong current was generated in coastal waters off Takasu, cold water accompanied by strong current expanded to coastal seas around Cape Echizen in the subsurface layer. From these results of the observations and the simulation, it was considered that the strong current in the coastal waters off Takasu in summer was attributed to the acceleration of the FBTC, which is accompanied by cold water expansion in the subsurface layer to the vicinity of the coast and contact of the FBTWC along the cold water edge with the coast.

Original languageEnglish
Pages (from-to)157-169
Number of pages13
JournalJournal of Oceanography
Volume75
Issue number2
DOIs
Publication statusPublished - Mar 15 2019

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coastal water
cold water
summer
coast
simulation
coastal current
research vessel
water temperature
fishery

All Science Journal Classification (ASJC) codes

  • Oceanography

Cite this

Intensification of current in coastal waters around Cape Echizen in summer. / Kaneda, Atsushi; Ayukawa, Kouta; Hirose, Naoki; Senjyu, Tomoharu; Kumaki, Yutaka; Igeta, Yosuke; Fukudome, Ken ichi; Watanabe, Tatsuro.

In: Journal of Oceanography, Vol. 75, No. 2, 15.03.2019, p. 157-169.

Research output: Contribution to journalArticle

Kaneda, A, Ayukawa, K, Hirose, N, Senjyu, T, Kumaki, Y, Igeta, Y, Fukudome, KI & Watanabe, T 2019, 'Intensification of current in coastal waters around Cape Echizen in summer', Journal of Oceanography, vol. 75, no. 2, pp. 157-169. https://doi.org/10.1007/s10872-018-0492-y
Kaneda, Atsushi ; Ayukawa, Kouta ; Hirose, Naoki ; Senjyu, Tomoharu ; Kumaki, Yutaka ; Igeta, Yosuke ; Fukudome, Ken ichi ; Watanabe, Tatsuro. / Intensification of current in coastal waters around Cape Echizen in summer. In: Journal of Oceanography. 2019 ; Vol. 75, No. 2. pp. 157-169.
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