主办单位：中国气象局沈阳大气环境研究所
国际刊号：ISSN 1673-503X
国内刊号：CN 21-1531/P
气象与环境学报

气象与环境学报 ›› 2024, Vol. 40 ›› Issue (1): 9-16.doi: 10.3969/j.issn.1673-503X.2024.01.002

• 论文 • 上一篇    下一篇

台风“黑格比”和“利奇马”造成温州机场强降水特征差异及其成因分析

陈龚梅1(),厉瑞孝1,黄海玲2,罗厚炙1   

  1. 1. 中国民用航空温州空中交通管理站, 浙江温州 325024
    2. 民航华东空管局气象中心, 上海 200335
  • 收稿日期:2022-03-16 出版日期:2024-02-28 发布日期:2024-03-25
  • 作者简介:陈龚梅，女，1989年生，高级工程师，主要从事民航天气预报，E-mail: chengongm@126.com
  • 基金资助:
    国家自然科学基金项目(41975161);国家自然科学基金项目(42030608)

Characteristics and causes of heavy precipitation differences at Wenzhou Airport caused by typhoon "Hagupit" and "Lekima"

Gongmei CHEN1(),Ruixiao LI1,Hailing HUANG2,Houzhi LUO1   

  1. 1. Wenzhou Air Traffic Management Station of Civil Aviation of China, Wenzhou 325024, China
    2. Meteorological Center of East China Air Traffic Management Bureau, Shanghai 200335, China
  • Received:2022-03-16 Online:2024-02-28 Published:2024-03-25

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摘要：

利用常规气象观测资料、热带气旋数据集资料、NCEP的1°×1°逐6 h再分析资料及FY-2G黑体亮度温度(TBB)资料，对比“黑格比”和“利奇马”影响温州机场的降水特征，分析造成降水差异的环流形势及物理量场特征。结果表明：“黑格比”与“利奇马”对温州机场造成大暴雨的影响时段不同，“黑格比”降水集中在台风登陆前后，由台风本体降水导致，“利奇马”降水集中在台风登陆前，主要为台风外围螺旋雨带携带降水造成；低空急流及浅层水汽输送通道为台风提供水汽和能量，925 hPa水汽通量散度的变化与台风暴雨影响时段有较好的对应关系，长时间的强水汽通量辐合可导致暴雨的持续增强，“黑格比”登陆时浅层长时间的强水汽通量辐合是导致“黑格比”较“利奇马”维持长时间强降水的主要原因；高层辐散低层辐合的动力机制配合浅层垂直上升运动，有利于台风暴雨的增强，“黑格比”较“利奇马”更为强盛而稳定的动力机制，是造成两台风对温州机场降水强度差异的重要原因；“黑格比”影响期间，TBB云图结构上整体云团结构对称紧实，降水主要受其本体云系覆盖影响；而“利奇马”降水则主要受其外围螺旋云带影响。机场暴雨时段与TBB≤-70 ℃云团覆盖的时长有关，“黑格比”影响期间TBB≤-70 ℃云团的长时间覆盖是导致其降水较“利奇马”强的直接原因。

关键词: 强降水差异, 水汽输送, 动力机制, 云顶亮温

Abstract:

Using the conventional observation data, tropical cyclone dataset data from China Meteorological Administration, the 1°×1°reanalysis data of NCEP every six hours and FY-2G temperature of brightness blackbody (TBB) product, the precipitation distribution characteristics caused by "Hagupit" and "Lekima" at Wenzhou airport, the characteristics of environmental field and the physical field causing the difference precipitation are analyzed. The results show that: The influence periods at Wenzhou Airport of "Hagupit" and "Lekima" are different. The "Hagupit" precipitation is concentrated before and after the landing, which is caused by the precipitation of the typhoon itself. The precipitation of "Lekima" is concentrated before the landing, mainly caused by the precipitation carried by the spiral rainband around the typhoon; The low-level jet and the shallow water vapor transport channels provide water vapor and energy for typhoon, and the variation of water vapor flux divergence at 925 hPa has a good corresponding relationship with typhoon rainstorm.Long-term convergence of strong water vapor flux can lead to the continuous enhancement of rainstorm.Compared with "Lekima", the long-term convergence of strong water vapor flux in the shallow layer during the landing of "Hagupit" is the main reason for the long-term heavy rainfall; The dynamic mechanism of high-level divergence and low-level convergence combined with the shallow vertical upward movement is beneficial to the intensification of typhoon precipitation. The dynamic mechanism of "Hagupit" is more powerful and stable than "Lekima", which is the important reason for the difference precipitation between the two typhoons; On the structure of TBB cloud, during the influence period of "Hagupit" the overall cloud cluster structure was symmetrical and compact, and precipitation was mainly affected by its ontological cloud cover, while the precipitation of "Lekima" is mainly influenced by its outer spiral cloud belt. The heavy rain period of airport is related to the coverage of the clouds with TBB ≤-70 ℃, and the long coverage of TBB≤-70 ℃ clouds during the period of "Hagupit" is the direct reason for the stronger precipitation than "Lekima".

Key words: Heavy precipitation difference, Water vapor transport, Dynamic mechanism, TBB

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