大气科学2026，Vol.50Issue(2)：478-494,17.DOI:10.3878/j.issn.1006-9895.2501.24112
华东地区一次积层混合云降水中融化层附近微物理特征分析
Analysis of Microphysical Characteristics near the Melting Layer in Stratiform Precipitation with Embedded Convection over East China
摘要
Abstract
The microphysical characteristics of the melting layer(ML)play a crucial role in shaping cloud structures and precipitation formation.In this study,the cloud microphysical characteristics near the ML in stratiform precipitation with embedded convection over East China on September 15,2023,are analyzed.The data are collected using an airborne Ka-band precipitation cloud radar(KPR)and a suite of in situ observation instruments onboard a King Air 350 aircraft operated by the Weather Modification Center of the China Meteorological Administration.The results show that above the ML,cloud particles primarily grow through riming and aggregation,with aggregated graupel particles being predominant.As ice-phase particles fall through the ML,they begin to melt,and graupel particles and large ice crystals gradually transform into small liquid droplets.With decreasing altitude,both the radial velocity and spectral width observed by the KPR gradually increase,and particle growth becomes dominated by collision and coalescence.Small droplets subsequently grow into larger ones through this process,ultimately forming precipitation.Fitted particle size distributions indicate that the Gamma distribution provides a good fit to both cloud and precipitation particle spectra.Above the ML,the slopes of the cloud droplet spectra and precipitation particle spectra gradually increase and decrease,respectively,with decreasing altitude.However,below the ML,the slopes of both the cloud droplet and precipitation particle spectra first increase and then decrease with decreasing altitude.关键词
融化层/Ka波段降水云雷达/原位观测/云微物理特征Key words
Melting layer/Ka-Band Precipitation Cloud Radar/In situ observation/Cloud microphysical characteristics分类
天文与地球科学引用本文复制引用
左懂飞,赵舒文,李军霞,杜远谋,高扬,张骁拓,张荣,夏兆军,王婉..华东地区一次积层混合云降水中融化层附近微物理特征分析[J].大气科学,2026,50(2):478-494,17.基金项目
国家自然科学基金项目42575098,天津市气象局科研项目202503ybxm02 The National Natural Science Foundation of China(Grant 42575098),Scientific Research Program of the Tianjin Meteorological Bureau(Grant 202503ybxm02) （Grant 42575098）
