刘钰洁,李扬,丁瑞强,钟权加,涂石飞

• 1:成都信息工程大学大气科学学院/高原大气与环境四川省重点实验室
• 2:中国科学院大气物理研究所大气科学和地球流体力学数值模拟国家重点实验室
• 3:北京师范大学环境演变与自然灾害教育部重点实验室
• 4:广东海洋大学南海海洋气象研究院

摘要(Abstract)：

【目的】探讨西北太平洋1998―2019年快速增强（RI）热带气旋（TC）的基本特征，以及RI发生前后TC内核区与雨带区的降水及其总降水的变化特征。【方法】利用IBTrACS最佳路径数据集、TRMM卫星降水格点数据和ERA-5再分析资料，对22 a发生在西北太平洋共132个RITC进行统计，分析RITC的时空特征和降水变化趋势，并利用总柱水汽含量的变化趋势分析其降水的变化特征。【结果与结论】（1）RITC主要发生在8-11月份菲律宾以东海域，大部分TC的RI过程发生在热带风暴形成后的72 h内，其持续时间通常为24～48 h。（2）在RI发生前后，TC内核区降水变化趋势相反，该区域降水类型不同：RI发生前，TC内核区降水随时间递减，且以对流降水为主；RI发生后，该区域降水随时间递增，且层状降水为主。（3）在RI发生前后，TC雨带区和总降水的变化趋势及降水类型基本一致：RI发生前，TC雨带区降水和总降水的层状和对流降水变化趋势都不明显；RI发生后，TC雨带区降水变化呈略微下降，TC总降水无明显变化。

关键词(KeyWords)： 西北太平洋;热带气旋;快速增强;降水;降水类型

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金（42105059,41975070）

作者(Author): 刘钰洁,李扬,丁瑞强,钟权加,涂石飞

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