Airborne Investigation of Riming:Cloud and Precipitation Microphysics within a Weak Convective System in North China  

作　　者：Xiangfeng HU Hao HUANG Shaoyu HOU Kun ZHAO Chuanfeng ZHAO Yinghui LU Jiefang YANG Rong ZHANG Delong ZHAO Weiguo LIU Dan ZHANG Haixia XIAO 

机构地区：[1]Key Laboratory of Radar Meteorology and State Key Laboratory of Severe Weather,China Meteorology Administration,Beijing 100044,China [2]China Meteorological Administration Xiong'an Atmospheric Boundary Layer Key Laboratory,Xiong'an New Area,Hebei 071703,China [3]Hebei Provincial Weather Modification Center,Shijiazhuang,Hebei 051430,China [4]School of Atmospheric Sciences,Key Laboratory of Mesoscale Severe Weather/MOE,and Frontiers Science Center for Critical Earth Material Cycling,Nanjing University,Jiangsu 210023,China [5]Department of Atmospheric and Oceanic Sciences,School of Physics,Peking University,Beijing 100871,China [6]Laboratory of Cloud-Precipitation Physics and Severe Storms,Institute of Atmospheric Physics,Chinese Academy of Sciences,Beijing 100029,China [7]Cloud-Precipitation Physics and Weather Modification Key Laboratory,China Meteorology Administration,Beijing 100044,China [8]Beijing Weather Modification Center,Beijing 100089,China [9]Nanjing Joint Institute for Atmospheric Sciences,Nanjing,Jiangsu 210000,China

出　　处：《Advances in Atmospheric Sciences》2025年第3期515-526,共12页大气科学进展(英文版)

基　　金：supported by the National Natural Science Foundation of China(Grant No.42025501);the Natural Science Foundation of Hebei Province(Grant No.D2024304015);the Fundamental Research Funds for the Central Universities,including Grant No.020714380217;the Cemac“GeoX”Interdisciplinary Program(Grant No.020714380210);the Open Grants of the Key Laboratory of Radar Meteorology,China Meteorological Administration(Grant No.2023LRM-B05);the Hebei Meteorological Service Scientific Research and Development Project(Grant No.23ky08);the Open Research Program of the State Key Laboratory of Severe Weather(Grant No.2023LASW-A01)。

摘　　要：The process of riming significantly impacts the microphysical characteristics of clouds.This study uses aircraft and radar observation data in stratiform clouds with convection embedded that occurred in the central and southern regions of North China on 22 May 2017.The microphysical structural characteristics and processes near the embedded convection core and in the stratiform cloud are analyzed comparatively.Particular attention is given to the effect of riming on the microphysical properties near the upper boundary of the melting layer and to the factors influencing riming efficiency.The collaborative observations reveal that the particle size distributions observed near the convection core and in the stratiform region are close,while the particle properties like habit and riming degree are quite different.Above the melting layer,larger plate-like ice particles and supercooled water droplets(D>50μm)are more abundant near the convective core,leading to higher collision efficiencies between ice particles and supercooled water droplets.Larger fluctuation amplitudes of vertical airflow near the convective core also contribute to the increased riming activity and the formation of more heavily rimed particles,such as graupel.Furthermore,in situ measurements from airborne probes also revealed that above the melting layer,the riming process involves two stages:the mass of snow crystals grows as supercooled droplets merge internally without changing size,followed by external freezing that significantly enlarges the crystals.

关 键 词：RIMING collision efficiency airflow fluctuation particle habit aircraft measurement 

分 类 号：P426[天文地球—大气科学及气象学]