Cause analysis of the rainfall remote from the tropical cyclone in 2012(2012年一次台风远距离暴雨的成因分析)
利用NCEP1×1资料和实况雨量资料,对2012年梅雨期首场特大暴雨过程进行了分析,结果表明:(1)本次特大暴雨与典型梅雨的环流形势不同,是西风槽和台风“古超”、“泰利”共同作用的结果.中纬度西风槽提供了有利于暴雨发展的大尺度环流背景,而“古超”东侧的东南暖湿气流沿副高外围向低涡及切变线输送,为暴雨天气提供了充沛的水汽和能量.(2)强降水过程的不同阶段,水汽来源也不同.前期水汽来源于东海和南海,由低空偏南风和东南风急流向暴雨区输送水汽,降水集中期水汽由台风“古超”东部环流与副高之间的东南风从西太平洋和东海向暴雨区输送,“泰利”的作用较小,后期水汽主要来源于南海,由西南风急流提供.(3)降水前期...
Main Author: | SHENXiaoling(沈晓玲) |
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Format: | Article |
Language: | zho |
Published: |
Zhejiang University Press
2014-12-01
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Series: | Zhejiang Daxue xuebao. Lixue ban |
Subjects: | |
Online Access: | https://doi.org/10.3785/j.issn.1008-9497.2014.Supp.006 |
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