外洋影響を考慮した瀬戸内海周辺海域の流動再現と黒潮流路変動の効果について

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タイトル別名
  • Impact of the Kuroshio Paths on Oceanic and Estuarine Circulations in and around Seto Inland Sea
  • ガイヨウ エイキョウ オ コウリョ シタ セトナイカイ シュウヘン カイイキ ノ リュウドウ サイゲン ト クロシオ リュウロ ヘンドウ ノ コウカ ニ ツイテ

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The estuarine circulation in Seto Inland Sea (SIS) has been reported to be affected by the intrusion of the Kuroshio through its two narrow channels. Fluvial buoyancy and mass inputs, as well as its complex coastline,topography and thousands of islands, could skew the oceanic influxes through nonlinear processes, and thus substantially enhance intrinsic variability in the estuary. In the present study, a SIS downscaling system is developed based on a double-nested ROMS at a horizontal grid resolution up to 600 m forced by the assimilative JCOPE2 and the JMA GPV-MSM, to examine the interaction between the estuary and the Kuroshio. After validating the SIS model output, subtidal variabilities on the volume exchange at the two channels along with the riverine influxes are investigated.

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