热带海洋学报 ›› 2009, Vol. 28 ›› Issue (5): 49-55.doi: 10.11978/j.issn.1009-5470.2009.05.049

• 海洋物理学 • 上一篇    下一篇

厄尔尼诺期间和后期南海海面温度的两次显著增暖过程

黄卓1,2 , 徐海明1 , 杜岩2 , 谢强2    

  1. 1. 南京信息工程大学大气科学学院,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:2009-04-07 修回日期:2009-08-05 出版日期:2009-11-10 发布日期:2009-10-10
  • 作者简介:黄卓(1985—),女,广西桂平市人,硕士研究生,主要从事海气相互作用与气候变化研究。
  • 基金资助:

    科学院知识创新工程项目(KZCX2-YW-BR-04);国家自然科学基金项目(40876007);国家重点基础研究项目(2006CB403607,KZCX2-YW-Q11-02)

Two sea-surface warming events in the South China Sea during and after El Nino

HUANG Zhuo1, XU Hai-ming1, DU Yan2, XIE Qiang   

  1. 1. College of Atmospheric Sciences, Nanjing University of Information Science and Technology, Nanjing 210044, China;
    2. Key Laboratory of Tropical Marine Environmental Dynamics, South China Sea Institute of Oceanology, CAS, Guangzhou 510301, China
  • Received:2009-04-07 Revised:2009-08-05 Online:2009-11-10 Published:2009-10-10
  • About author:黄卓(1985—),女,广西桂平市人,硕士研究生,主要从事海气相互作用与气候变化研究。
  • Supported by:

    科学院知识创新工程项目(KZCX2-YW-BR-04);国家自然科学基金项目(40876007);国家重点基础研究项目(2006CB403607,KZCX2-YW-Q11-02)

摘要:

通过分析ICOADS海洋气象资料,结合ISCCP短波辐射和OISST海面温度,研究并探讨了ENSO等大尺度海气相互作用过程背景下南海海表面温度(SST)的年际变化。研究表明,南海SSTA的年际变化和ENSO关系密切,并且分为两个阶段。以增暖事件为例,在厄尔尼诺(El Nino)发生年的冬季和消亡年的夏季,南海出现了两次显著增暖。第一次增暖出现在El Nino盛期,是El Nino影响的一部分,这时南海云量减少,净太阳辐射通量增加,SST上升。第二次增暖出现在El Nino结束后的夏季,不是El Nino直接作用的结果;这时夏季风减弱,一方面使得海洋的潜热损失减少,另一方面减弱了越南东部沿岸的上升流,两者的共同作用导致SST增加。

关键词: 南海, 海表面温度, 年际变化, 厄尔尼诺

Abstract:

Using monthly products from the International Comprehensive Ocean-Atmosphere Data Set (ICOADS), the International Satellite Cloud Climatology Project (ISCCP), and the Optimum Interpolation Sea Surface Temperature (OISST), the authors investigate the interannual variation of sea-surface temperature (SST) along a meridional transection in the South China Sea (SCS). It is found that the air-sea interaction in the tropical Pacific plays an important role in the SCS SST variation. Taking warming as an example, the SCS SST warms up in the winter of El Nino developing year and again in the following summer. The first SCS warming occurs during the mature phase of El Nino. The decrease in cloudage and increase in net shortwave radiation flux contribute to the SST warming in the winter. The air-sea interaction associated with El Nino has a direct impact on this SCS warming process. The second warming occurs in the summer after the decay of El Nino. The weakening summer monsoon reduces the latent heat flux release and coastal upwelling off the southeastern Vietnam, which could not be attributed to the direct impact of the El Nino.

Key words: El Nino, South China Sea, sea-surface temperature, interannual variability