亚澳季风区水汽收支时空分布特征  

THE TEMPORAL AND SPATIAL CHARACTERISTICS OF MOISTURE BUDGETS OVER ASIAN AND AUSTRALIAN MONSOON REGIONS

作　　者：乔云亭[1] 罗会邦[1] 简茂球[1] 

机构地区：[1]中山大学大气科学系,广东广州510275

出　　处：《热带气象学报》2002年第3期203-210,共8页Journal of Tropical Meteorology

基　　金：<国家重点基础研究发展规划>G1998040900项目第一部分基金;国家科技部攀登A项目"南海季风试验研 究"的联合资助

摘　　要：用1980～1989年NCEP/NCAR再分析资料计算了亚澳季风区视水汽汇并分析了其水汽收支时空分布特征。结果表明,该研究范围水汽收支的典型空间分布型为南北型,即南半球澳大利亚季风区与北半球亚洲季风区相反的分布形势,而且这种分布形势有明显的季节变化。冬季北半球亚洲季风区为水汽源,110～135 E之间大陆桥附近、80 E附近及40～50 E之间的三支越赤道水汽输送通道将北半球水汽输送到南半球澳大利亚季风区及南印度洋,成为水汽汇,夏季南半球澳大利亚季风区和南印度洋为水汽源,上述三支越赤道水汽输送通道实现与夏季反向的水汽输送,将水汽由南半球输送到北半球亚洲季风区,此时亚洲季风区为水汽汇。春季和秋季赤道辐合带为主要的水汽汇,亚澳季风区无明显越赤道水汽输送。The apparent moisture sink and water vapor transport flux are calculated by using NCAR/NCEP reanalyzed daily data for water vapor and wind fields at various levels from 1980 to 1989, and with the aid of EOF analysis method, the temporal and spatial characteristics of moisture budgets over Asian and Australian monsoon regions are studied. The results show that there is apparent seasonal transition of moisture sink and water vapor transport between Asian monsoon region and Australian monsoon region. In winter, Asian monsoon region is a moisture source, in which three cross-equatorial water vapor transport channels in the “Continent bridge”, 80 E and 40～50 E transport the water vapor to the Australian monsoon region and south Indian Ocean which are moisture sinks. In summer, Australian monsoon region and south Indian Ocean are moisture sources, the former three cross-equatorial water vapor transport channels transport the water vapor to the Asian monsoon region which is a moisture sink. In spring and autumn, ITCZ is the main moisture sink, there is no apparent water vapor transport between Asian monsoon region and Australian monsoon region.

关 键 词：亚澳季风区 水汽收支 时空分布特征 季节变化 水汽输送 赤道辐合带 

分 类 号：P426[天文地球—大气科学及气象学]