Variation Characteristics of Water Vapor Resources over the Three Gorges Reservoir Area during 1980-2009
Variation Characteristics of Water Vapor Resources over the Three Gorges Reservoir Area during 1980-2009
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1980-2009年三峡库区水汽资源变化特征
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发表时间：
2012
期刊：
影响因子：
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通讯作者：
Cheng Bing
中科院分区：
文献类型：
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作者：
Cheng Bing
根据三峡库区及周边15个站1980-2009年的探空资料，分析了三峡库区及周边地区大气中水汽含量的变化特征。结果表明：三峡库区上空水汽含量从东北向西南逐渐增加。三峡库区上空水汽主要来自西南水汽输送，夏季强度最大。三峡库区大部分地区存在水汽辐合，在三峡库区西北部和东南部明显。三峡库区上空水汽主要来自南界输入，东界流出。各月净水汽通量均为正值。近30年来，水汽净输送通量呈先增大后减小的抛物线年代际变化，春、冬季呈减小趋势，夏、秋、年平均呈增大趋势。
On the basis of meteorological sounding data at 15 stations in the Three Gorges Reservoir Area(TGRA) and its surroundings from 1980 to 2009,the variation characteristics of water resources in air over the TGRA are analyzed.The results show that the water vapor content increases gradually from northeast to southwest over the TGRA.The water vapor over the TGRA mainly comes from the transportation of southwest water vapor,which has the greatest intensity in summer.There is convergence of water vapor over most of the TGRA,apparently in northwest and southeast of the TGRA.The water vapor over the TGRA mainly inflows from south boundary and outflows from east boundary.The net water vapor flux is positive in each month,showing a single peak changes at maximum in July.The integrated net water vapor transport flux has experienced a parabolic decadal change with first increasing and then decreasing,and had an decreasing trend in spring and winter and an increasing trend in summer,autumn and annual mean in the past 30 years.