南海盐度对南海夏季风响应的初步分析  

Preliminary study on the salinity characteristics of South China Sea and its response to the summer monsoon

作　　者：李秀珍[1] 梁卫[1] 温之平[1] 蔡榕硕[2] 

机构地区：[1]中山大学季风与环境研究中心/大气科学系,广东广州510275 [2]国家海洋局第三海洋研究所/国家海洋局海洋-大气化学与全球变化重点实验室,福建厦门361005

出　　处：《热带海洋学报》2011年第1期29-34,共6页Journal of Tropical Oceanography

基　　金：国家海洋局科研项目(国海科字[2008]307);国家"908"专项资助项目(908-02-01-02)

摘　　要：为分析南海盐度对南海夏季风的响应情况,采用1967—2001年共35年的月平均海洋同化数据(SODA)等资料,利用合成等分析方法,探讨了南海上层盐度与净淡水通量、风应力、Ekman抽吸速度的关系以及不同海域盐度对南海夏季风爆发以及季风强度的响应。结果表明,随着南海夏季风建立,南海北部、东部的盐度降低,南部盐度增加。在强季风年,南海北部沿岸、东部盐度偏低,南海南部马来西亚以北海域盐度偏高;弱季风年南海盐度异常分布则为北部、东部盐度偏高,南部盐度偏低。南海上层盐度对南海夏季风爆发和季风强度的响应均与南海的净淡水通量、风应力、Ekman抽吸速度存在密切关系。Using the simple ocean data assimilation（SODA） data from 1967 to 2001,this study revealed the upper level salin-ity distribution in the South China Sea（SCS） and its response to the activity and intensity of the SCS monsoon.The results indicate that with the onset of the SCS monsoon,the high-salinity tongue in the northern and southern SCS weaken and retreat eastward,the salinity decreases in the northern and eastern SCS but increases in the southern SCS.In the strong monsoon years,the anomalous salinity is negative in the coastal sea area and the eastern SCS,but negative in the southern SCS.In the weak monsoon years,the anomalous pattern of salinity is the opposite.The upper level salinity’s response to the activity and intensity of the SCS monsoon in the SCS is closely related to the net freshwater flux,wind stress,and Ekman pumping.

关 键 词：南海 盐度 夏季风 响应 

分 类 号：P731[天文地球—海洋科学]