南海冬、夏季环流的三维数值模拟

蔡树群; 王文质

南海冬、夏季环流的三维数值模拟

中国科学院南海海洋研究所, 广州 510301

基金项目: 国家自然科学基金(49476279);中德海洋科技项目

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出版历程
- 收稿日期: 1997-09-30
- 修回日期: 1998-04-05

Three-dimensional numerical simulation of South China Sea circulation in winter and summer

South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301

摘要

摘要: 本文利用一个斜压三维陆架海模式——HAMSOM模式对12月份和8月份的南海环流进行数值模拟,结果为:对上层流场,在12月份,在西沙群岛－中沙群岛海区间呈现一个气旋式环流,在越南中部东岸存在一支南向西边界流,在金兰湾的远海为一局地反气旋涡,在南海南部,主要表现为万安滩的气旋式大弯曲(气旋涡)及在北康暗沙北侧的反气旋涡;在8月份,在东沙群岛－中沙群岛－吕宋岛西侧海域间存在一大尺度的气旋涡,在南海西部主要表现为以西沙群岛南部的气旋涡与金兰湾－礼乐滩间的反气旋式大环流相对峙的局面,同时在万安滩东侧有－气旋涡.由于斜压效应、底形效应的作用,使冬、夏季的南海南部中层流场几乎与上层流场相反.
- 数值模拟 /
- 南海环流 /
- 涡旋 /
- 弯曲
Abstract: A baroclinic three-dimensional shelf sea model-HAMSOM model is employed to simulate the South China Sea (SCS) circulation in December and August.The result is that: for the upper layer circulation, in December, there exists a cyclonic circulation between Xisha Islands and Zhongsha Islands sea zones, a southward western boundary current along the east shore of middle Vietnam and a local anticyclonic eddy in out-lying sea of Jinlan Bay, in the southern SCS, it is mainly shown that there is a large cyclonic meander (cyclonic eddy) in Wanantan and an anticyclonic eddy in the north of Beikangansha.In August, there is a large-scale cyclonic eddy among Dongsha Islands,Zhongsha Islands and western sea areas of Luzon Island,in the western SCS.it is mainly shown that there is a cyclonic eddy in the south of Xisha Islands against an anticyclonic circulation between Jinlan Bay and Liyuetan, in the meanwhile a cyclonic eddy in the east of Wanantan.Due to the actions of baroclinic effect and bottom topsgraphic effect, the current fields of middle layer to southern SCS in winter and summer are almost opposite to those of the surface layer.
- Numerical simulation /
- South China Sea circulation /
- eddy /
- meander

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