渤海夏季环流和渤海海峡水体输运的数值诊断研究  

Numerical Diagnostic Study of the Summertime Circulation inthe Bohai Sea and the Water Transport in the Bohai Strait

作　　者：魏泽勋[1] 李春雁 方国洪[1] 王新怡[1] 

机构地区：[1]国家海洋局第一海洋研究所 [2]Skidaway Institute of Oceanography

出　　处：《海洋科学进展》2003年第4期454-464,共11页Advances in Marine Science

基　　金：国家重点基础研究发展规划项目--中国近海环流形成变异机理;数值预测方法及对近海环境影响的研究(G1999043808);中国科学院王宽诚科研奖励基金项目--渤海海峡夏季水体输运(2001 58)

摘　　要：建立了一个基于POM的涵盖渤、黄、东海的海洋环流诊断模式来研究渤海夏季环流。分别进行了风海流、密度流和总环流的模拟。从模拟结果得出:渤海海峡夏季与北黄海的水交换总的来说表现为北进南出特征,但与冬季相比,其流量较小(约5×103m3s 1)且不能深入渤海。辽东湾基本上受气旋式环流控制,黄河口外至渤海湾受反气旋式环流控制。数值实验表明,渤海夏季主要属密度流性质。在渤海海峡的北岸存在一支明显的上升流,而且北部的海水垂向运动比南部要强许多。在渤海中部的纬向断面上,东部的海水垂直交换要比西部活跃得多;渤海海水的垂向运动亦主要是密度流导致的。A numerical diagnostic circulation model based on the Princeton Ocean Model (POM) covering the Bohai Sea, Yellow Sea and East China Sea is established to study the summertime circulation in the Bohai Sea, and the numerical experiments of wind-driven current, density current and general circulation were made, respectively. It is shown from the numerical experiment results that the water exchange between the Bohai Sea and the northern Yellow Sea in summer generally shows characteristics with water flowing into the Bohai Sea through the northern Bohai Strait and flowing out of the Bohai Sea through the southern Bohai Strait. Compared with the wintertime water transport, the summertime water transport (about 5×10~3 m^3s^(-1)) is smaller, and the inflow water cannot flow far into the Bohai Sea. The Liaodong Bay is basically controlled by a cyclonic gyre, and the sea area off the Yellow River mouth and the Bohai Bay are basically controlled by an anticyclonic gyre. It is shown from the numerical experiment results that the summertime circulation in the Bohai Sea mainly has a density current nature. An obvious upwelling exists in the northern Bohai Strait and is stronger in the north than in the south. On the zonal section in the central Bohai Sea, the vertical water exchange is more active in the east than in the west, and the vertical water movement in the Bohai Sea is also caused mainly by the density current.

关 键 词：渤海 夏季环流 风海流 密度流 数值模拟 

分 类 号：P731.27[天文地球—海洋科学]