气象与环境学报2025，Vol.41Issue(2)：37-46,10.DOI:10.3969/j.issn.1673-503X.2025.02.005
2022年7月环渤海地区一次中β尺度深对流云团强降水过程分析
Analysis of a meso-β scale deep convective cloud cluster and heavy rainfall process in the Bohai Rim Region in July 2022
摘要
Abstract
Based on conventional meteorological observation data,FY-4A satellite data and ERA5 reanalysis data,this study analyzes the large-scale environmental background,dynamical conditions,as well as the forcing mecha-nism of meso-β scale deep convective cloud clusters and their feedback mechanism associated with a heavy rainfall event over the Bohai Rim region during 5-7 July,2022.The results show that under the joint influence of an upper-level trough and Western Pacific subtropical high,low-level shear line and low-level vortex provided favorable dy-namic conditions for the development of convective cloud clusters during this heavy rainfall process.Within the cloud cluster group,meso-β scale deep convective cloud clusters formed and developed into multiple mesoscale rain bands.The cloud-top brightness temperature(TBB)of these deep convective clouds was below-52℃,with heavy precipitation generally occurring in regions of large TBB gradients near the cloud cluster peripheries.The in-teraction of unstable stratification,water vapor flux convergence,and slantwise updrafts further enhanced the inten-sification and maintenance of deep convective cloud clusters.Moreover,the centers of convective condensation la-tent heating and the convergence zones of the divergent component of Q vector showed good correspondence with heavy rainfall centers,which indicating that convective condensation latent heat release within and around the deep convective cloud clusters strengthened the upward motion,thereby affecting rainfall intensity.deep convective cloud clusters enhanced updraft intensity through convective condensation latent heating,thereby affecting precipi-tation intensity.关键词
云顶亮温/对流云团簇/对流凝结/潜热加热Key words
Cloud-top brightness temperature/Convective cloud cluster/Convective condensation/Latent heating分类
大气科学引用本文复制引用
常姝婷,张翠艳,姜文,温舟,白雪..2022年7月环渤海地区一次中β尺度深对流云团强降水过程分析[J].气象与环境学报,2025,41(2):37-46,10.基金项目
中国气象局沈阳大气环境研究所联合开放基金(2021SYIAEKFZD03)和中国气象局创新发展专项(CXFZ2023J014)共同资助. （2021SYIAEKFZD03）
