1994年8月亚洲季风区水汽的源汇分布和输送

THE SOURCE/SINK DISTRIBUTION OF WATER VAPOR WITH ITS TRANSFER IN ASIAN MONSOON REGION IN AUGUST,1994

讨论了水汽气候源汇分布的分析方法，认为只有用季节平均的整层大气水汽通量散度才能准确反映水汽源汇的地理分布。分析了亚洲季风区１９９４年８月水汽源汇分布和输送情况，发现西太平洋１２０－１３３°Ｅ和孟加拉湾地区是水汽气候源区，其中菲律宾东侧、苏绿湾、黄海海域、安达曼海及布拉马普特拉河谷是最主要的５个水汽强源域。南海不是水汽源而是水汽汇。华北降水主要受亚洲两大季风风系和黄海、布拉马普特拉河谷水汽源的影响。

t is pointed out in the paper that the geographical distribution of source/sink for water vapor can be correctly reflected only by seasonalmean water moisture flux divergence summed up vertically.Results show that the west Pacific(120-133°E) and the Bay of Bengal are the sources of water vapor in Asian monsoon area in August,in which,the five strongest ones are located in east of Philippines,Sulu sea,HuangHai Sea,Andaman Sea and Brahmaputra Valley.The South China Sea is a sink,not a source of water moisture.The rainfall in North China is mainly under the influence of two Monsoon systems in Asia and the water source in HuangHai Sea and Brahmaputra Valley.