阿拉伯海东南海域盐度收支的季节变化

doi:10.11978/j.issn.1009-5470.2009.05.066

热带海洋学报 ›› 2009, Vol. 28 ›› Issue (5): 66-74.doi: 10.11978/j.issn.1009-5470.2009.05.066cstr: 32234.14.j.issn.1009-5470.2009.05.066

阿拉伯海东南海域盐度收支的季节变化

张玉红1,2, 徐海明1, ，杜岩2 , 王东晓2

1.南京信息工大学大气科学学院，江苏南京 210044；
2.中国科学院南海海洋研究所热带海洋环境动力学重点实验室，广东广州 510301

收稿日期:2009-04-28 修回日期:2009-06-08 出版日期:2009-11-10 发布日期:2009-10-10
通讯作者: 杜岩
基金资助:
科学院知识创新工程项目（KZCX2-YW-BR-04；LYQY200807；KZCX2-YW-214；KZCX2-YW-Q11-02）

Seasonal variability of salinity budget in the southeastern Arabian Sea

ZHANG Yu-hong1,2，XU Hai-ming1，DU Yan2，WANG Dong-xiao2

1．College of Atmospheric Sciences，Nanjing University of Information Science and Technology，Nanjing 210044，China；2．Key Laboratory of Tropical Marine Environmental Dynamic，South China Sea Institute of Oceanology， CAS，Guangzhou 510301，China

Received:2009-04-28 Revised:2009-06-08 Online:2009-11-10 Published:2009-10-10
Contact: 杜岩
Supported by:
科学院知识创新工程项目（KZCX2-YW-BR-04；LYQY200807；KZCX2-YW-214；KZCX2-YW-Q11-02）

摘要/Abstract

摘要：

采用SODA海洋同化产品的月平均资料,本文分析了阿拉伯海东南海域表层盐度的季节变化特征，发现局地海面淡水通量不能解释盐度的变化。两个典型区域的表层海水盐度收支分析表明，海洋的平流输送是造成阿拉伯海东南海域盐度冬季降低、夏季升高的主要原因，而淡水通量仅在夏季印度西侧沿岸区域造成盐度降低。冬季，东北季风环流将孟加拉湾北部的低盐水沿同纬度输送到阿拉伯海，然后向北输送，使表层海水盐度降低；夏季，西南季风环流把阿拉伯海西北部的高盐水向南、向东输送，使阿拉伯海东南海域盐度升高。受地理位置因素的影响，阿拉伯海东南海域表层盐度的变化冬季明显强于夏季。

关键词: 阿拉伯海东南海域, 表层盐度, 季节变化, 淡水通量, 平流输送

Abstract:

Based on the monthly mean data of Simple Ocean Data Assimilation (SODA) product, the authors analyze the seasonal salinity budget of surface layer in the southeastern Arabian Sea., The salinity variation in the region cannot be explained by surface freshwater flux. The salinity budgets in two typical regions show that horizontal advection dominates salinity variation, decreasing the salinity in winter and increasing it in summer, except for the coastal region off western India where the surface freshwater flux decreases salinity in summer. During winter, the northeast monsoon current advects fresher water from the Bay of Bengal into the Arabian Sea along the same latitude and then transports the low saline-water northward, resulting in salinity reduction in the surface layer of the southeastern Arabian Sea. During summer, southwest monsoon current advects high-salinity water in the northwestern Arabian Sea southeastward, increasing the salinity in the surface layer of the southeastern Arabian Sea. In the southeastern Arabian Sea, salinity variation of the surface layer is prominently stronger in winter than in summer.

Key words: southeastern Arabian Sea, salinity budget, seasonal variation, freshwater flux, horizontal advection

张玉红,徐海明,杜岩,王东晓 . 阿拉伯海东南海域盐度收支的季节变化[J]. 热带海洋学报, 2009, 28(5): 66-74.

ZHANG Yu-hong,XU Hai-ming,DU Yan,WANG Dong-xiao. Seasonal variability of salinity budget in the southeastern Arabian Sea[J]. Journal of Tropical Oceanography, 2009, 28(5): 66-74.

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阿拉伯海东南海域盐度收支的季节变化

Seasonal variability of salinity budget in the southeastern Arabian Sea

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