Effects of Synoptic Wind Variation on the Transport through the Korea/Tsushima Strait
The transport change through the Korea/Tsushima Strait (KTS) as a response to the synoptic surface wind variation is investigated using the observed ADCP transport for 10 years and a barotropic model.In a high-frequency band (3-50 days),lagged covariance of the ADCP transport to surface wind stress and pressure is computed,and shows high correlations between them within lags of 2 days.It exhibits the volume transport responses to a synoptic pressure system moving eastward in the East/Japan Sea (EJS).The extracted forcing based on the covariance fields of the transport variation to wind stress and pressure at sea level are given in the numerical model as atmospheric forcing oscillating in a period of 6 days.The model results applied the forcings indicate that the contribution of the surface wind stress to the transport variation is higher than that of the sea level pressure.A sensitive experiment to the surface wind reveals that local wind in the KTS is most crucial to the volume transport,explaining about 30% of the total variations.The east Korean coast is also the effective area of wind on the transport,contributing over 20% of variance.By Jacobs et al.(2005),the wind in the region at the synoptic band is mostly influential to develop a coastal wave propagation by which the transport of water mass occurs in the strait.Our results suggest that the contribution of local wind in the strait to the transport is high as much as wind along the eastern Korean coast.Furthermore,around 16% and 13% of the transport variation can be atributed to the wind stress in the eastern sides of the Soya and Tsugaru Straits,respectively.
Transport response Synoptic atmospheric forcing Korea/Tsushima Strait
Boonsoon Kang Naoki Hirose
Research Institute for Applied Mechanics(RIAM), Kyushu University at Kasuga, Fukuoka, 816-8580, Japan
国际会议
The 17th Pacific -Asian Marginal Seas Meeting(第十七届太平洋与亚洲边缘海国际会议)
杭州
英文
632-638
2013-04-23（万方平台首次上网日期，不代表论文的发表时间）