【摘要】 <正> 绪言 东中国海环流是控制本海区水文气象状况的最重要因子。但至今尚无完整的动力学理论分析,这是因为对产生该海区环流的主要因子了解不够,加之它岸形复杂,水深变化很大,难以用一个解析模式将全海区概括起来。目前在黑潮深水区进行了一些动力计算,得到较好的结果,但在近岸浅水区由于零面选取上的困难,动力计算方法无法使用。因此,利用数值模式来模拟全海区的环流成为研究东中国海环流的重要途径之更多还原

【Abstract】 Based on the "wind-curl-thermohaline gradient equation" proposed by Feng[1], one of the authors of this paper, and taking actual bottom fluctuation into account a two-dimensional numerical model of steady-state circulation driven by ununiform surface wind and thermohaline effect is presented. The model is applied to the East China Sea. The computations of winter circulation exhibit considerable agreement with the observed current field. The trend of circulation is almost parallel to isobaths. The Kuroshio exerts great influence on the southeast part of the area in question, where swift current flows nearly along the isobath of 200 m, it’s main part outflowing from the east boundary of the region, while the other, smaller one, flowing and branching into the Tsushima Current and the Yellow Sea Warm Current. In the north part of the waters, there exists a counter clockwise "Yellow Sea Gyre System" consisting of the northward Yellow Sea Warm Current and the southward China Coastal Current. At the southwest end of the area, Min-Zhe Branch of the Kuroshio together with Taiwan Strait Counter Current flows south in a semi-arc pattern along north coast of Taiwan Island.The influence of boundary forces, thermohaline effect, wind stress vortieity and water depth on the circulation are estimated respectively. The computations show that the circulation pattern of the East China Sea, under the action of boundary forces (especially Kuroshio System), depends basically on the bottom topography, the thermohaline effect plays a determinant role in generation of the counter clockwise "Yellow Sea Gyre System" , and the wind stress, however, only acts as an adjustment factor and is of less importance.更多还原