Precipitation characteristics of typhoon Lekima (2019) at landfall revealed by joint observations from GPM satellite and S-band radar
Precipitation characteristics of typhoon Lekima (2019) at landfall revealed by joint observations from GPM satellite and S-band radar
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GPM卫星与S波段雷达联合观测揭示台风利奇马（2019）登陆降水特征
DOI：
10.1016/j.atmosres.2021.105714
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发表时间：
2021-10
影响因子：
5.5
通讯作者：
Lifeng Zhang
中科院分区：
文献类型：
--
作者：
Zuhang Wu;Yanbin Huang;Hengchi Lei;Yun Zhang;Hepeng Zheng;Lifeng Zhang
雷达和卫星联合观测数据可以提供一种更有效的方法来研究登陆的台风降水，但这种情况很少出现。本研究利用GPM卫星和s波段多普勒雷达联合观测，揭示台风利基玛（2019）登陆时的降水特征。结果表明，台风眼壁（EW）、内雨带（IR）和外雨带（OR）在登陆期间的降水微物理机制存在差异。在熔融层下，EW区降水以碰撞-聚结过程为主，大/中型雨滴（~1.6 mm）是降水的主要成分。在红外区降水中，碰撞-合并、破碎和蒸发过程接近平衡，导致该区域普遍存在中/小雨滴（~1.3 mm）。熔融和蒸发过程是OR地区降水的主要微物理机制，降水以少量大尺度降水（~1.7 mm）为主。雷达谱宽的大值与卫星探测到的有效反射率（Ze）中心、质量加权平均直径（Dm）中心和风暴顶高（STH）峰值有明显的相关性，共同表明登陆台风“利基玛”内部的强对流活动。进一步启发我们更好地利用多普勒天气雷达和GPM卫星的联合观测资料，在实际应用中分析台风登陆期间强降雨的微物理和动力学。
Radar and satellite joint observation data can provide a more efficient way to study landfalling typhoon precipitation, but rarely does this combination of circumstances occur. In this study, we attempt to reveal the precipitation characteristics of typhoon Lekima (2019) at landfall by using joint observations from GPM satellite and S-band Doppler radar. The results suggest that the precipitation microphysical mechanisms are different among typhoon eyewall (EW), inner rainband (IR), and outer rainband (OR) during landfall. Beneath melting layer, collision-coalescence process dominates the precipitation in EW region, with large‐/mid- size raindrops (~1.6 mm) as the main components of precipitation. Collision-coalescence, breakup, and evaporation processes are in near balance within the precipitation of IR region, leading to prevailing mid‐/small- size raindrops (~1.3 mm) of this region. Melting and evaporation processes are the main precipitation microphysical mechanism in OR region and a small amount of large-size drops (~1.7 mm) constitute the majority of precipitation. Moreover, the large values of radar spectrum width exhibit an appreciable correlation with satellite detected effective reflectivity (Ze) center, mass-weighted mean diameter (Dm) center, and storm top height (STH) peak, jointly indicating the strong convection activity inside landfalling typhoon Lekima, which further enlightens us to make better use of joint observation data from Doppler weather radar and GPM satellite to analyze the microphysics and dynamics associated with heavy rainfall during typhoon landfall in operational applications.
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影响因子：
1
作者：
Jiangnan Li;Youlong Chen;Wenshi Lin;Fangzhou Li;Chenghui Ding
通讯作者：
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影响因子：
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通讯作者：
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影响因子：
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作者：
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通讯作者：
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影响因子：
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作者：
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通讯作者：
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