A Preliminary Analysis of Typical Structures and Microphysical Characteristics of Precipitation in Northeastern China Cold Vortexes

Remote. Sens. Pub Date : 2023-07-04 DOI:10.3390/rs15133399

Jingshi Wang, X. Zhuge, Fengjiao Chen, Xu Chen, Yuan Wang

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引用次数: 1

Abstract

The northeastern China cold vortex (NCCV) is the main weather system affecting Northeast China. Based on the precipitation products from the dual-frequency precipitation radar (DPR) onboard the Global Precipitation Measurement core observatory (GPM) satellite, the precipitation structures and microphysical properties for different rain types in 6432 NCCVs from 2014 to 2019 were studied using dynamic composite analysis. Our results show that the precipitation in NCCVs is dominated by stratiform precipitation. Regions with high stratiform and convective precipitation frequency have a comma shape. The growth mechanism of precipitation particles changes at ~4 km in altitude, the lower particles grow through collision (more pronounced in convective precipitation), and the upper hydrometeors grow through the Bergeron process. Additionally, the precipitation structures and microphysical properties exhibit great regional variations in NCCVs. The rainfall for all rain types is the strongest in the southeast region within an NCCV, mainly characterized by higher near-surface droplet concentration, while precipitation events occur more frequently in the southeast region for all rain types. There are active rimming growth processes above the melting layer for convective precipitation in the western region of an NCCV. In the southeast region of an NCCV, the collision growth of droplets in both types of precipitation is the most obvious.

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中国东北冷涡降水典型结构及微物理特征初步分析

东北冷涡是影响东北地区的主要天气系统。基于全球降水测量核心观测站(GPM)卫星双频降水雷达(DPR)的降水产品，采用动态复合分析方法研究了2014 - 2019年6432个nccv不同降雨类型的降水结构和微物理特性。结果表明，nccv降水以层状降水为主。层状降水和对流降水频率高的区域呈逗号状。降水颗粒生长机制在~4 km高度发生变化，低层颗粒通过碰撞生长(在对流降水中更为明显)，上层水成物通过Bergeron过程生长。此外，nccv降水结构和微物理性质也表现出较大的区域差异。在NCCV内，各雨型降水均以东南地区最强，主要表现为近地表液滴浓度较高，而各雨型降水均以东南地区较多。在NCCV西部地区，对流降水在熔融层上方存在活跃的边缘生长过程。在NCCV东南部，两种降水中液滴的碰撞生长最为明显。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Remote. Sens.

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