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Kuriyama, T., Kobe University, Kobe, Japan, takaokuriyama@gmail.com
Uchiyama, Y., Kobe University, Kobe, Japan, uchiyama@harbor.kobe-u.ac.jp
Miyazawa, Y., JAMSTEC, Yokohama, Japan, miyazawa@jamstec.go.jp

INTERACTION BETWEEN THE KUROSHIO INTRUSION AND INTRINSIC VARIABILITY IN SETO INLAND SEA, JAPAN

The estuarine circulation in Seto Inland Sea, Japan, has been reported to be largely affected by the intrusion of the Kuroshio water through its two narrow channels, the Bungo Channel to the west and the Kii Channel to the east. In addition, freshwater inputs and the complicated coastline, topography and over 3,000 islands could skew the Kuroshio influxes through nonlinear processes, and substantially enhance intrinsic variability in the estuary. In the present study, a doubly-nested oceanic modeling framework based on ROMS (Regional Oceanic Modeling System) downscaled from the JCOPE2 (Japan Coastal Ocean Predictability Experiment) dataset is developed to examine the interaction between estuarine and Kuroshio waters at a horizontal resolution up to 600 m. To accurately account for the mass, momentum and buoyancy fluxes from Kuroshio to the estuary, a careful diagnosis on the reproducibility of Kuroshio paths, thermocline slope and density structure is conducted by comparing to data. Tidal and subtidal variabilities of the mass exchange at the two channels and several cross-sections along the longitudinal axis of the estuary and their impacts on the circulation are discussed.

Oral presentation

Session #:GS02
Date: 7/09/2012
Time: 16:30