中国上空的涡动水汽输送

刘国纬; 崔一峰

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中国上空的涡动水汽输送

刘国纬, 崔一峰

文章导航 > 水科学进展 > 1991 > 2(3): 145-153

刘国纬, 崔一峰. 中国上空的涡动水汽输送[J]. 水科学进展, 1991, 2(3): 145-153.

引用本文:

刘国纬, 崔一峰. 中国上空的涡动水汽输送[J]. 水科学进展, 1991, 2(3): 145-153.

Liu Guowei, Cui Yifeng. The Eddy Transport of Atmospheric Moisture over China[J]. Advances in Water Science, 1991, 2(3): 145-153.

Citation:

Liu Guowei, Cui Yifeng. The Eddy Transport of Atmospheric Moisture over China[J]. Advances in Water Science, 1991, 2(3): 145-153.

中国上空的涡动水汽输送

水利部南京水文水资源研究所

基金项目: 水利水电科学基金资助

The Eddy Transport of Atmospheric Moisture over China

Nanjing Institute of Hydrology and Water Resources

摘要: 利用1983年国内外149个探空站全年资料,系统地研究了中国大陆上空的涡动水汽输送,包括涡动水汽输送的路径、收支量及其时空分布特点。研究表明,我国夏半年是涡动水汽源地,冬半年是汇地;涡动水汽以春、秋的4、10月最强,30°～40°N间最为活跃;涡动水汽净输送量在华北、西北、东北均超过总输送净量的50%;涡动水汽的经向性十分明显,经由长江流域北界输入北方的涡动水汽量占总输送量的91%强,表明它是把湿润地区暖湿水汽输向干旱、半干旱地区的主要机制,这不仅对北方大气湿度的维持,而且对其降水都有着特殊的贡献。

Abstract: Based on the computation of eddy transport of atmospheric moisture by using the balloon sounding data collected from 149 meteorologic stations in 1983, some new findings for the feature of eddy transport over the territory of China have been obtained: (1) The routs of eddy transport flux present meridionality, the general direction of eddy transport is similar to that of the moisture gradient tranports atmospheric moisture to arid region in the northwest of the country from its southeast. The phenomena are of significant importance to provide and maintain the atmospheric moisture over the inland region in northwest China. (2) The eddy transport is active especialy in middle latitude zone (30°～40°N) of China, some divergence and convergence centers of eddy transport flux are available and the location of the center varies with different month and is closely related to the places of high precipitation. (3) The mainland of China shows a region with eddy vapour source in winter month and eddy vapour sink in summer month. 88% of eddy transport of atmospheric moisture enters China in the south and 55% and 40% leave China from the north and the east boundries. The exchange of atmospheric moisture by means of eddy transport between regions is considerable. (4) The contribution of eddy transport to total transport of atmospheric moisture is important, for example, the amount of atmospheric moisture by means of eddy transport from Yangtze River basin to north China is more than 90% of the total atmospheric moisture transport.

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中国上空的涡动水汽输送

水利部南京水文水资源研究所

基金项目: 水利水电科学基金资助

收稿日期: 1990-05-28
修回日期: 1990-10-18
刊出日期: 1991-07-25

摘要: 利用1983年国内外149个探空站全年资料,系统地研究了中国大陆上空的涡动水汽输送,包括涡动水汽输送的路径、收支量及其时空分布特点。研究表明,我国夏半年是涡动水汽源地,冬半年是汇地;涡动水汽以春、秋的4、10月最强,30°～40°N间最为活跃;涡动水汽净输送量在华北、西北、东北均超过总输送净量的50%;涡动水汽的经向性十分明显,经由长江流域北界输入北方的涡动水汽量占总输送量的91%强,表明它是把湿润地区暖湿水汽输向干旱、半干旱地区的主要机制,这不仅对北方大气湿度的维持,而且对其降水都有着特殊的贡献。

English Abstract

The Eddy Transport of Atmospheric Moisture over China

Nanjing Institute of Hydrology and Water Resources

Received Date: 1990-05-28
Rev Recd Date: 1990-10-18
Publish Date: 1991-07-25

Abstract: Based on the computation of eddy transport of atmospheric moisture by using the balloon sounding data collected from 149 meteorologic stations in 1983, some new findings for the feature of eddy transport over the territory of China have been obtained: (1) The routs of eddy transport flux present meridionality, the general direction of eddy transport is similar to that of the moisture gradient tranports atmospheric moisture to arid region in the northwest of the country from its southeast. The phenomena are of significant importance to provide and maintain the atmospheric moisture over the inland region in northwest China. (2) The eddy transport is active especialy in middle latitude zone (30°～40°N) of China, some divergence and convergence centers of eddy transport flux are available and the location of the center varies with different month and is closely related to the places of high precipitation. (3) The mainland of China shows a region with eddy vapour source in winter month and eddy vapour sink in summer month. 88% of eddy transport of atmospheric moisture enters China in the south and 55% and 40% leave China from the north and the east boundries. The exchange of atmospheric moisture by means of eddy transport between regions is considerable. (4) The contribution of eddy transport to total transport of atmospheric moisture is important, for example, the amount of atmospheric moisture by means of eddy transport from Yangtze River basin to north China is more than 90% of the total atmospheric moisture transport.

刘国纬, 崔一峰. 中国上空的涡动水汽输送[J]. 水科学进展, 1991, 2(3): 145-153.

引用本文:

刘国纬, 崔一峰. 中国上空的涡动水汽输送[J]. 水科学进展, 1991, 2(3): 145-153.

Liu Guowei, Cui Yifeng. The Eddy Transport of Atmospheric Moisture over China[J]. Advances in Water Science, 1991, 2(3): 145-153.

Citation:

Liu Guowei, Cui Yifeng. The Eddy Transport of Atmospheric Moisture over China[J]. Advances in Water Science, 1991, 2(3): 145-153.