Event‐based precipitation characteristics related to cloud‐top temperature during pre‐summer rainy season over south China
Event‐based precipitation characteristics related to cloud‐top temperature during pre‐summer rainy season over south China
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DOI：
10.1002/joc.7974
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发表时间：
2022-12
期刊：
影响因子：
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通讯作者：
A. Zhang;Yilun Chen;Weibiao Li;Shumin Chen
中科院分区：
文献类型：
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作者：
A. Zhang;Yilun Chen;Weibiao Li;Shumin Chen
降水以事件的形式存在，即同一事件内的所有像元具有相似的大气条件和发展经历。因此，我们利用2016 - 2020年的GPM DPR和Himawari‐8 AHI数据，对中国南方夏季前雨季降水进行了基于事件的调查。根据云顶温度的模式，将识别的雨团（RCs）分为三类，包括265 K的雨团。结果表明，云顶温度为265 K模式的rc对累积降雨量的贡献小于10%。它们主要是由低液滴密度的局部对流引发的暖云浅降水。我们的研究结果表明，降水的事件尺度特征指示了降水的触发和微物理。
Precipitation exists in the form of event, which means all pixels within the same event have similar atmospheric condition and development experiences. Therefore, using GPM DPR and Himawari‐8 AHI data from 2016 to 2020, we carried out event‐based investigations on precipitations during the pre‐summer rainy season over south China. The identified rain clusters (RCs) were classified into three classes based on the mode of cloud‐top temperature, including those 265 K. The results show that RCs with mode of cloud‐top temperature 265 K contributed less than 10% of the accumulated rainfall amount. They were mainly warm‐cloud shallow precipitations triggered by local convection with low droplet density. Our results suggest that the event‐scale characteristics of precipitation are indicative of the triggers and microphysics of precipitation.