夏季长江冲淡水转向机制分析  

Analysis of Direction Change Mechanism of the Changjiang River Diluted Water in Summer

作　　者：廖启煜[1] 郭炳火[1] 刘赞沛[1] 

机构地区：[1]国家海洋局第一海洋研究所,山东青岛266061

出　　处：《黄渤海海洋》2001年第3期19-25,共7页Journal of Oceanography of Huanghai & Bohai Seas

基　　金：国家重点基础研究发展资助项目 (G1 9990 4 3 80 2 )

摘　　要：利用 1 95 9,1 975 - 1 982年及 1 998年夏季各月黄、东海盐度分布和相应风场资料 ,分析讨论了长江冲淡水夏季的扩展路径。指出 :除海底坡降外 ,由 S向的苏北沿岸流和 N,NE向的浙东沿岸流及台湾暖流构成的“力偶”,是使冲淡水向左扭转的重要外力之一。The monthly salinity and wind data in summers of 1959, 1975～1982 and 1998 were used to analyse and discuss the spreading paths of the Changjiang River diluted water. It is shown from the analysis results that besides the bottom slope gradient, the couple of forces caused by the southward Subei coastal current and the northward or northeastward Zhejiang coastal current and Taiwan warm current is one of main external forces to make the diluted water turn left. In addition, the direction change mechanism of the diluted water is qualitatively discussed by using a nearshore homogeneous model and the vorticity equation with an offshore two layer model, respectively.

关 键 词：长江 冲淡水 涡度方程 背景沿岸流 夏季 转向机制 盐度分布 风场 

分 类 号：P731.21[天文地球—海洋科学]