The Transportation Paths of Water Vapor and Its Relation to Climate Change over North China
The Transportation Paths of Water Vapor and Its Relation to Climate Change over North China
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发表时间：
2006
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通讯作者：
Gao Xiaoqing
中科院分区：
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作者：
Gao Xiaoqing
利用HYSPLIT_4模式和NCAR/NCEP再分析资料，对1948-2003年中国北部夏季水汽输送路径的年代际变化进行了计算和讨论。结果表明，中国北部夏季水汽输送特征明显。1950-1970年，中国北部850hPa水汽输送的主要方向是南向输送。1970年代S的水汽输送方向为西移，1980年代为西北输送。此外，1960-1964年水汽输送垂直积分也有极大值。水汽输送路径的变化与东亚夏季风的减弱有关。中国北部地区夏季水汽输送路径的特征与1950年的S和2000年的S有很大的不同。
By using the HYSPLIT_4 Model and NCAR/ NCEP reanalysis data form 1948 to 2003,the interdecadal variations of the water vapor transportation paths over North China in summer(JJA) have been calculated and discussed in this paper.The results showed that the characteristics of water vapor transportation change were obvious.The dominant direction of the water vapor transportation at 850 hPa over North China in summer(JJA) from 1950 to 1970 was from south.In 1970′s,the direction of the water vapor transportation became from west and it was from northwest in 1980′s.In addition,there was maximum for the vertical integral of vapor fluxes from 1960 to 1964,which began to decrease from 1965.The vapor flux was less and stable since 1977.The variations of the water vapor transportation paths is related with the weaken of summer monsoon over East Asia.The character of water vapor transportation path in North China region in summer months(JJA) is very different from 1950′s to 2000′s.