强热带风暴“帕卡”活动特征分析-海洋预报

强热带风暴“帕卡”活动特征分析

单位：1. 中国海洋大学, 山东青岛 266100;
2. 中国人民解放军61741部队, 北京 100094

分类号：P444

出版年·卷·期（页码）：2013·30·第二期（75-80）

摘要：

1201号强热带风暴“帕卡”是今年在西北太平洋及南海活动的第一个热带气旋，也是自1979年以来第一个在3月份生成于南海的热带气旋。本文利用多种资料，分析了“帕卡”强度及移动路径特点，并对引起其1移动路径及强度变化的原因做了进一步分析，主要得出以下结论：（1）“帕卡”生成过程中有两次冷空气影响南海，冷空气间隙暖湿的下垫面条件和较强的水汽和能量输送是系统迅速生成的主要原因；（2）西北太平洋副高的一次短周期活动，对“帕卡”移动路径变化起着重要作用；（3）空气的冷暖交汇作用加强了风暴中心的垂直对流结构，使“帕卡”登陆时仍然维持热带风暴的强度。

Strong tropical storm "Pakhar"(1201) is the first tropical cyclone in the Northwestern Pacific and the South China Sea in this year. It is also the first tropical cyclone generated in the South China Sea in March since 1979. Using multiple sources of data, the intensity and moving track of "Pakhar" were analyzed. The results showed that,(1)Twice cold air processes affected the South China Sea during Pakhar developing."Pakhar" is quickly developed with the warm and wet sea surface condition and the abundant moisture and energy transportation.(2)The west Pacific subtropical high changed in a short cycle, which had important effect on the track of Pakhar.(3)The convergence of warm and clod air strengthened the vertical convections in the center of "Pakhar". It remained strong tropical storm when landing in Viet Nam.

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