南海海温异常对华南气候影响的数值研究  

A NUMERICAL STUDY OF THE EFFECTS OF SOUTH CHINA SEA SST ANOMALIES ON THE CLIMATE IN SOUTH CHINA

作　　者：冯瑞权[1] 吴池胜[1] 王安宇[1] 古志明[2] 侯尔滨[2] 唐天毅[2] 

机构地区：[1]中山大学大气科学系,广东广州510275 [2]澳门地球物理暨气象局

出　　处：《热带气象学报》2004年第1期32-38,共7页Journal of Tropical Meteorology

基　　金：中国科学院知识创新工程项目--"亚洲季风区海-陆-气相互作用对我国气候变化的影响(ZKCX2-SW-210)"

摘　　要：1985年5月广东省的中、南部和西南部出现较为严重的暴雨洪涝灾害。利用美国国家大气研究中心和宾西法尼亚州大学联合研制的中尺度模式(MM5)成功地模拟了该月的华南气候,并通过敏感性试验研究了南海海温异常增暖对华南天气气候的影响。结果表明,海面温度的异常增暖改变了海面与行星边界层大气之间的能量交换过程,即增加了由海面向上输送的潜热通量和感热通量,从而引起南海及其附近地区对流层下部的月平均气温升高,气柱不稳定度增大;并在对流层下(上)部产生一个附加的差值气旋(反气旋)性环流。大气环流结构的这些改变对1998年5月广东中南部和西南部的洪涝有重要的影响。Serious floods occurred in the central, southern and southwestern Guangdong province in May, 1998. With the mesoscale model (MM5) of the U.S.A., the work was successful in simulating the climate in southern China for the month and through sensitivity experiments studies the effects of anomalous SST warming in the South China Sea on the weather and climate in southern China. The result shows that the warming changes the energy exchanges between the sea surface and the planetary boundary layer. It adds in effect latent and sensible heat transmitting upward from sea surface to increase the monthly mean air temperature in the lower troposphere over the sea and adjacent regions and the instability of air columns. It also results in an additional differential cyclonic (anti-cyclonic) circulation in the lower (upper) parts of the troposphere. The changes in the atmospheric circulation structure have important effect on the floods in the above-mentioned regions of the province in May 1998.

关 键 词：华南气候 南海海温异常 数值模拟 

分 类 号：P435[天文地球—大气科学及气象学]