中国科学院 | 大气所 | 网站地图 | 加入收藏
首 页  | | | 论文论著 | | 科学传播 | English  
  学术报告
学术报告
学术报告 您当前所在的位置: 首页 > 学术报告 > 学术报告
Contribution of Tropical Cyclones to Atmospheric Moisture Transport and Rainfall over East Asia
来源:LASG    访问次数:    报告时间:2017-3-21
【报告人】        Dr. Liang Guo
【报告人单位】University of Reading
【报告时间】    2017年3月21日(星期二)15:30
【报告地点】    科研楼303会议室
【报告简介】    The 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 months behind that of the EASM, the moisture transported by TCs is an important source for the water budget over the EA region when the EASM withdraws. This moisture transport is largely performed by westward-moving TCs. These results improve understanding of the water cycle of EA and provide a useful test bed for evaluating and improving seasonal forecasts and coupled climate models. 
 
© 1997-2010 大气科学和地球流体力学数值模拟国家重点实验室 版权所有 京ICP备06004370号
北京9804信箱LASG 邮编:100029 传真:82995172