Program and Agenda

Abstract

COOLING THE UPPER OCEAN AROUND SETO INLAND SEA DUE TO TYPHOONS

Oceanic responses to typhoon passages are investigated with a synoptic, triple nested downscaling ROMS model forced by the assimilative JMA GPV-MSM atmospheric reanalysis for the coastal marginal sea in and around Seto Inland Sea, Japan. The persistent clockwise estuarine circulation and the eastward-flowing Kuroshio are key features that lead to the overall circulations. In the fall 2012, SST is found to decrease about two degrees for a two-week period during three consecutive typhoons passing nearby. The first EOF mode of the modeled SST corresponds to the seasonal cooling along with mixed-layer deepening, whereas the effects of the typhoons appear in higher modes. The second and forth modes jointly represent cold water formation associated with storm-driven coastal upwelling that propagates with the estuarine circulation. Kuroshio interacts with the topography to form standing cyclonic cold-core eddies as extracted in the third mode, resulting in intermittent eastward cold-water transport beyond headlands. We further investigate surface heat budget submodels including the COARE 3.0 parameterization to best reproduce SST, and extend the present modeling to a series of typhoons attacked in the fall 2013.

ePoster:

Authors

Nishii Tatsuya, N. T., Kobe University, Japan, Japan, tatsuya0874242@gmail.com

Uchiyama Yusuke, U. Y., Kobe University, Japan, Japan, uchiyama@harbor.kobe-u.ac.jp

Mori Nobuhito, M. N., DPRI, Kyoto University, Japan, Japan, mori.nobuhito.8a@kyoto-u.ac.jp

Baba Yasuyuki, B. Y., DPRI, Kyoto University, Japan, Japan, baba.yasuyuki.7z@kyoto-u.ac.jp

Details

Poster presentation

Session #:044
Date: 2/26/2014
Time: 16:00 - 18:00
Location: Poster/Exhibit Hall

Presentation is given by student: Yes

PosterID: 1367