热带气象学报2017，Vol.33Issue(3)：415-425,11.DOI:10.16032/j.issn.1004-4965.2017.03.012
高原低涡影响下的一次暖区强降水特征分析
ANALYSES OF HEAVY RAINSTORM IN WARM SECTOR UNDER THE INFLUENCE OF THE LOW-PRESSURE SYSTEM OF QINGHAI-XIZANG PLATEAU
摘要
Abstract
An analysis of the meso-convective system in a heavy rain event on 30 to 31 July 2014 in the Sichuan basin is performed by using routine observational data,ground intensive observational data,FY-2E satellite observational data,Doppler radar data and NCEP/NCAR 1 °× 1 ° reanalysis data.(1) There is good correlation between the heavy precipitation and the meso-scale convergence line (MCL):the MCL occurred an hour earlier than the heavy precipitation,which was mainly within the weak cold air of the boundary layer on its left side of the MCL and moved with it.(2) High unstable energy,high low-level humidity,a low lifting condensation level and a deep wet layer were very beneficial to the occurrence of the heavy rain.And adequate water vapor is transported to the heavy rain area and then provided good moisture conditions for the maintenance of the heavy rain.(3) The positive vorticity advection made the low-level low-pressure develop and vertical movement strengthen,and triggered convective activity in the eastward-going process of the plateau vortex,which was the exciting mechanism of heavy rainfall.And the diabatic heating released by rainfall condensation played a feedback role in the maintenance of the heavy rain.关键词
暖区暴雨/高原低涡/中尺度对流系统Key words
rainstorm/meso-scale convective systems/plateau vortex分类
天文与地球科学引用本文复制引用
杨康权,卢萍,张琳..高原低涡影响下的一次暖区强降水特征分析[J].热带气象学报,2017,33(3):415-425,11.基金项目
国家重点基础发展计划项目(2012CB417202) （2012CB417202）
国家自然科学基金项目(91337215、41405145、41405036) （91337215、41405145、41405036）
成都高原气象研究所开放实验室基金项目(BROP201512)共同资助 （BROP201512）
