闽浙沿岸上升流的数值模拟  

NUMERICAL STUDY ON THE 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：《海洋预报》2004年第2期86-95,共10页Marine Forecasts

基　　金：国家703(03-03-03-05)项目资助

摘　　要：本文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模式,综合考虑风、边界流(台湾暖流、黑潮、长江冲淡水)及地形等动力因子对上升流形成的影响,较好地模拟了闽浙沿岸上升流的分布.得出夏季闽浙沿岸近海岸区域有三个比较强的上升流中心,分别位于25.20′N,120°00′E、26°40′N,120.15′E、27.20′N,120°45′E附近,并且在对闽浙沿岸水文结构的模拟中,同样得出夏季沿岸的低温高盐区与计算出的三个较强的上升中心一致.冬季沿岸上升流的强度和范围都明显减弱,但在25.20′N,120°00′E和26.00′N,120°30′E及28°30′～30°00′N,122.00′E附近仍有相对较强的上升流存在.Many studies were done about the coastal upwelling off Fujian and Zhej iang. But most of them were obtained by analysis of observational data, or by diagnost ic analysis. Few were done by numerical study. The factors considered were not complete. This paper takes the coastal off Fujian and Zhejiang as an example, dynamical factors that influenced the coastal upwelling off Fujian and Zhejiang were considered in detail. A three-dimensional nonlinear baroclinic shallow water and continental shelf mod el with primitive equations in coordinate system is used in this paper. Results show that Fujian and Zhejiang are two upwelling areas. The temperature field and salinity field in summer have been calculated in this paper. We conclude that the area of low temp erature and high salinity of the coastal Fujian and Zhejiang and the area of upwelling o ff Fujian and Zhejiang are consistent. They lie in the area of 25°20′ 120°E;26°40′ 1 20°10′ N, N, E and 27°20′ 120°40′ Comparison between the coastal upwelling in winter and in N, E. summer, we found the intensity and areas are weakened significantly.

关 键 词：闽浙沿岸 上升流 断面分布 数值模拟 水文结构 

分 类 号：P731.2[天文地球—海洋科学]