Contribution of Tropical Cyclones to Atmospheric Moisture Transport and Rainfall over East Asia
Contribution of Tropical Cyclones to Atmospheric Moisture Transport and Rainfall over East Asia
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DOI：
10.1175/jcli-d-16-0308.1
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发表时间：
2017-05
影响因子：
4.9
通讯作者：
Liang Guo;N. Klingaman;P. Vidale;A. Turner;M. Demory;A. Cobb
中科院分区：
文献类型：
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作者：
Liang Guo;N. Klingaman;P. Vidale;A. Turner;M. Demory;A. Cobb
摘要东亚沿海地区是热带气旋影响最频繁的地区之一。在这项研究中，降雨和水汽输送相关的TC在EA测量，TC对区域水收支的贡献进行了比较与其他贡献者，特别是EA夏季风（EASM）的平均环流。基于ERA中期再分析（1979-2012），使用客观特征跟踪方法识别TC的轨迹。超过60%的TC发生在7月至10月（JASO）。在JASO期间，热带气旋降水对东亚沿海地区月降水的贡献率为10%~ 30%，其中以9月华南和东南沿海的贡献率最高。热带气旋对日极端降雨量的贡献较大（高于95百分位数）：在东亚沿岸为50%-60%，在台湾岛高达70%。与东亚夏季风平均值相比，热带气旋在东亚上空输送的水分较少。然而，由于TC的平均季节周期的峰值滞后于两个...
AbstractThe coastal region of East Asia (EA) is one of the regions with the most frequent impacts from tropical cyclones (TCs). In this study, rainfall and moisture transports related to TCs are measured over EA, and the contribution of TCs to the regional water budget is compared with other contributors, especially the mean circulation of the EA summer monsoon (EASM). Based on ERA-Interim reanalysis (1979–2012), the trajectories of TCs are identified using an objective feature tracking method. Over 60% of TCs occur from July to October (JASO). During JASO, TC rainfall contributes 10%–30% of the monthly total rainfall over the coastal region of EA; this contribution is highest over the south/southeast coast of China in September. TCs make a larger contribution to daily extreme rainfall (above the 95th percentile): 50%–60% over the EA coast and as high as 70% over Taiwan Island. Compared with the mean EASM, TCs transport less moisture over EA. However, as the peak of the mean seasonal cycle of TCs lags two...