山西中尺度暴雨云团演变个例分析  

A Case Study on the Evolution of Mesoscale Rainstorm Clouds in Shanxi

作　　者：贾晓霞[1] 徐卫丽[1] JIA Xiao-xia(Shuozhou Meteorol-ogical Bureau,Shuozhou,Shanxi 036002)

机构地区：[1]朔州市气象局,山西朔州036002

出　　处：《农业灾害研究》2021年第7期113-114,共2页Journal of Agricultural Catastrophology

摘　　要：利用常规高空、地面观测资料及乡镇区域站小时降水资料,分析2016年8月15日山西中北部连片暴雨过程。结果表明:本次过程是短时强降水累计暴雨,降水时间短、强度大。高空急流轴右侧辐散作用加强了上升运动,副高外围暖湿气流输送增强了暴雨区的不稳定性和水汽累积;强降水暴雨落区、不稳定区与700 hPa切变线、850 hPa辐合线叠加区域吻合;地面小时最大雨量发生在云团发展成熟期。This paper analyzes the continuous rainstorm process in the central and northern part of Shanxi Province on August 15, 2016 by using the conventional high-altitude and ground observation data and hourly precipitation data of township regional stations. The results show that the process is a cumulative rainstorm with short-term heavy precipitation, and the precipitation time is less than 12 hours,and the intensity is high. The divergence on the right side of the upper-level jet axis strengthened the upward movement, and the transport of warm and wet airflow around the subtropical high enhanced the instability and water vapor accumulation in the rainstorm area. The heavy rainfall rainstorm area was consistent with the instability area and the superposition area of the 700 hPa shear line and 850 hPa convergence line. The maximum hourly rainfall on the ground occurs during the mature period of cloud development.

关 键 词：高空急流 副高 β尺度云团 

分 类 号：P441[天文地球—大气科学及气象学]