||The dynamics of water mass transport in the Taiwan Straits is complicated. The time variations of transport in the strait may be influenced by local wind, remote wind, the sea-level gradient between two ends of the strait and the intrusion of Kuroshio etc. This research was aiming for the regional wind effect and the transport variation of the strait. The main data set to be applied in this study is the QSCAT wind. The transport data were the results calculated in EASNFS model of Dr. Dong-Shan Ko (Naval Research Laboratory, Stennis Space Center USA). In order to validate the accuracy of the QSCAT wind, comparisons of QSCAT wind and that of four land weather stations near the Taiwan were conducted. The analysis showed that the variation of QSCAT wind, qualitively, was similar to that of land stations. However, the amplitude of QSCAT wind was larger. In general, the wind speed of QSCAT multiplied by a factor 0.6 would about be equal to the wind speed of land based weather station.|
The major methods apply to wind data were the Empirical Orthogonal Function(EOF) and correlation analyses. All the available QSCAT data near Taiwan were collected and were divided into remote wind (East China Sea, Yellow Sea and South China Sea) and local wind (Taiwan Strait). The EOF spatial patterns and time variation were then put together with the strait transport. The results of EOF analysis of QSCAT satellite observation derived wind showed that the regional wind field near Taiwan (100~450N，1050~1400E) were mainly dominated by monsoons (mode 1). There was a good correlation between the monsoon wind and transport variation in Taiwan Strait, with correlation coefficient (r) 0.73. The mode 2 typhoon signal showed week correlation with the transport variation of the strait. The reason is unknown which requires further exploration. In the winter northeastern monsoon season, the Yellow Sea, East China Sea remote wind and Taiwan Strait local wind all showed good correlation with the transport of the strait. However, in southwest monsoon period, the South China Sea wind field and the Taiwan Strait local wind field showed poor correlation with the transport of the strait. Advanced analysis of south sea wind stress curl suggested that the wind stress curl may influence the South China Sea circulation and the Kuroshio intrusion, and then caused the transport variations of the Taiwan Strait.