摘要
该文利用国家站累积降水观测资料和ERA-interim再分析资料对2018年7月1日16-22时玉屏局地强降水过程进行分析。从雷达回波、环流背景、热力条件和动力条件探讨此次强降水形成和持续的物理机制。结果表明:暖湿水汽主要来自孟加拉湾地区,贵州地区对流层低层存在切变线,玉屏上空大气层结不稳定,强烈的上升运动与低层辐合、高层辐散相配合,导致了此次局地短时强降水事件。
The cumulative precipitation observation data of the national station and the Era-interim reanalysis data were used to analyze the local strong precipitation process over Yuping County in Tongren City of Guizhou Province on July 1,2018.The the mechanism of formation and continuous process of this strong precipitation in term of the circulation background,thermodynamic conditions and dynamic conditions were discussed.The results show that the water vapor mainly comes from the Bay of Bengal region,there is wind-shear in the lower troposphere in Guizhou area.The atmosphere is unstable in the Yuping area,and the strong ascending motion cooperates with the lower-level convergence and high-level divergence,resulting in the heavy precipitation.
作者
廖洪敏
何为
石薇
武金霖
罗俊祎
胡蓉
LIAO Hongmin;HE Wei;SHI Wei;WU Jinlin;LUO Junyi;HU Rong(Yuping County Meteorological Station of Guizhou Province,Yuping 554000,China)
出处
《中低纬山地气象》
2020年第2期40-46,共7页
Mid-low Latitude Mountain Meteorology
关键词
强降水
大气环流
水汽条件
对流不稳定
动力条件
strong precipitation
atmospheric circulation
water vapor condition
convective instability
dynamic condition
