夏季闽浙沿岸上升流的数值研究  

Numerical Study on the Summer Coastal Upwelling off Fujian and Zhejiang

作　　者：潘玉萍[1] 沙文钰[1] 

机构地区：[1]解放军理工大学气象学院海洋气象系,江苏南京211101

出　　处：《海洋通报》2004年第3期1-11,共11页Marine Science Bulletin

基　　金：总装预研和国家703项目资助

摘　　要：将闽浙沿岸作为研究海区,采用σ 坐标下三维斜压非线性的浅海陆架数值模式研究风、边界流 台湾暖流、黑潮、长江冲淡水)、潮及地形等动力因子对上升流形成的影响。结果得出:西南季风是影 (响夏季闽浙沿岸近海岸区域上升流形成的重要因子;台湾暖流对闽浙沿岸上升流的形成起主要作用;黑潮对台湾岛以东海域上升流的形成影响较大;长江冲淡水不利于夏季闽浙沿岸上升流的形成,尤其是浙江沿岸;地形对闽浙沿岸上升流的形成作用较显著; M2 分潮对闽浙近海岸区域及台湾澎佳屿附近海域上升流的形成影响较大;本文在对夏季闽浙沿岸海区水文结构的模拟中,同样得出夏季沿岸的低温高盐区与本文所计算出的三个较强的上升中心一致。A three-dimensional nonlinear baroclinic shallow water and continental shelf model with primitive σequations in s coordinate system is used in this paper. The coastal areas of Fujian and Zhejiang are taken as the calculated areas. Wind stress, boundary flows (Taiwan warm current, Kuroshio current, Changjiang River diluted water), tide and topography that influence the coastal upwelling off Fujian and Zhejiang are studied in detail. Results show that the influence of south- westerly seasonal wind and Taiwan warm current is an important factor affecting the formation of the upwelling in the coastal areas of Fujian and Zhejiang in summer; The upwelling off Taiwan and the areas east of Taiwan is mainly influenced by Kuroshio current; The Changjiang River diluted water has some converse influence on the summer coastal upwelling, especially on the coastal Zhejiang; The sea bottom topography and tidal nonlinear effect are also important factors. Tide M2 mainly impacts on the coastal upwelling off Fujian and Zhejiang and the sea areas northeast of Taiwan. The temperature and salinity fields in summer have been calculated in this paper. We conclude that the three areas of low temperature and high salinity in the coastal Fujian and Zhejiang and the areas of upwelling off Fujian and Zhejiang are consistent.

关 键 词：闽浙沿岸 上升流 断面分布 数值研究 

分 类 号：P731.21[天文地球—海洋科学]