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Comparative analysis on two rainstorm processes affected by distant typhoon
Author(s): WU Maifeng, XIAO Xianghui, CAO Lingling, MA Yaorong, ZHANG Lijuan
Pages: 32-
37
Year: 2013
Issue:
1
Journal: Torrential Rain and Disasters
Keyword: typhoon distant rainstorm; easterly disturbance; low level jet;
Abstract: 利用常规高空、地面气象观测资料以及NCEP/NCAR 1°×1°逐6 h再分析资料,对2010年7月23—24日和2011年9月17—18日两次台风远距离暴雨进行对比分析.结果表明:两次暴雨过程虽然都受台风影响,但影响方式截然不同.前着台风直接通过低空急流将其附近的水汽、能量输送到暴雨区,降水效率高、强度大.后着台风作为扰动源,产生了类东风扰动并向西传播,在四川东部和青藏高原东部与西风带系统相遇,增大暴雨区气压梯度,诱发低空急流,增强暴雨区水汽辐合,同时延长西风带系统在暴雨区的停滞时间,造成降水时间延长.
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