Climatic features of the water vapor transport around east Asia and rainfall over Japan in June and September
Climatic features of the water vapor transport around east Asia and rainfall over Japan in June and September
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DOI：
10.1029/2005gl023665
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发表时间：
2005-09
影响因子：
5.2
通讯作者：
T. Yoshikane;F. Kimura
中科院分区：
文献类型：
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作者：
T. Yoshikane;F. Kimura
利用6、9月份的再分析资料，研究了与东亚中纬度地区降水密切相关的水汽输送的气候特征。随着台风的移动，9月份有大量水汽间歇性输送，而6月份则持续输送。我们将台风术语定义为当台风或热带风暴在A区(20N-40N，120E-150E)时，估计其对极地西风的影响。9月份，台风期间通过B段(25N，130E-150E)的极地西风平均(占总项的38.5%)约为20年累积总和的84%，表明台风和热带风暴对气候偏北西风的影响较大。结果表明，台风和热带风暴对东亚地区9月气候大气场的形成起着不可或缺的作用。
The climatic features of the water vapor transport (WVT), which is closely related to rainfall in the middle latitudes around east Asia, are investigated using reanalysis data in June and September. A large amount of water vapor is intermittently transported in September in association with the movement of typhoons, but continuously transported in June. We defined a typhoon term as that when a typhoon or tropical storm is in Region A (20N–40N, 120E–150E) to estimate the effect on the poleward WVT. In September, the poleward WVT through Segment B (25N, 130E–150E) in the typhoon term (38.5% of the total term) was about 84% of that in the 20‐year‐accumulated total term, indicating that the climatic poleward WVT is greatly affected by typhoons and tropical storms. It is concluded that the contribution of typhoons and tropical storms is indispensable for the formation of a climatic atmospheric field around east Asia in September.