南海潜热交换年际与年代际变化的分析探讨  

A discuss on interannual to decadal variations of latent heat exchange over the South China Sea

作　　者：隋丹丹[1] 谢强[1,2] 王东晓[1] 

机构地区：[1]中国科学院南海海洋研究所热带海洋环境国家重点实验室,广东广州51001 [2]中国科学院三亚深海科学与工程研究所,海南三亚572000

出　　处：《海洋学报》2012年第4期27-34,共8页

基　　金：国家重点基础研究计划("973"计划)项目(2011CB403503;2011CB403504);中国科学院知识创新工程重要方向项目(KZXZ-YW-Q11-02)

摘　　要：根据一套客观分析潜热通量、基于绕岛理论诊断的南海贯穿流(LST)、南海热含量等月平均资料,分析南海表层潜热通量的年际和年代际变化特征。南海地区的潜热通量冬季强,春季的潜热通量弱;在秋冬季节,南海北部的潜热通量远大于南部;夏季南海潜热通量南部高于北部;从20世纪80年代初潜热通量逐渐增加。使用EOF经验正交分解,M-K检验方法分析南海潜热通量的多时间尺度变化,前3个模态的方差贡献率分别为:53.01%(主要为长期趋势)、17.4%(年代际变化)、6.71%(年际变化)。分析表明在年际尺度上南海贯穿流(LST)减少导致南海海表温度(SST)增温幅度上升,海气温差比湿差减小,从而导致潜热释放减少,潜热通量呈负异常;反之LST进入南海增多,海气温差比湿差变大,导致南海潜热损失减少,潜热通量呈正异常。The study analyzes the interannual and decadal characteristics of South China Sea（SCS） surface latent heat flux according to the Objective Analysis of surface heat flux（OAflux）,the SCS throughflow（that is indicated by the Luzon Strait transport,LST） inferred by the＂Island Rule＂ theory and heat content in South China Sea.It reaches its peak in winter,and is the weakest in spring;In autumn and winter,latent heat flux is much larger in the North than that in the South,while it is larger in the South during summer.It shows that the SCS latent heat flux has been increasing since the beginning of 1980s.In the EOF analysis Mann-Kendall and trend methods of multi-time scales variation of the SCSlatent heat flux,the first three variances contribute： 53.01%（the major long-term trend）,17.4%（interdecadal change） and 6.71%（interannual change）,respectively.It can be concluded that in the interannual scales,if LST gets weaker after flowing into the SCS,it will result in warmer sea surface temperature（SST） and smaller temperature difference between air and sea,which leads to a decrease in the latent heat flux,that is,a negative latent heat flux anomaly;On the contrary,if LST gets stronger,then the temperature difference between air and sea increases,causing a positive latetn heat flux anomaly.

关 键 词：南海 潜热通量 南海贯穿流 热含量 年际 年代际 

分 类 号：P723.6[天文地球—海洋科学]