大气科学2013，Vol.37Issue(4)：923-932,10.DOI:10.3878/j.issn.1006-9895.2012.12075
长江下游梅汛期中尺度涡旋特征分析
Feature Analysis of Mesoscale Vortex over Lower Reaches of Yangtze River during Meiyu Period
摘要
Abstract
A procedure designed for sorting mesoscale vortices is used to sort mesoscale vortices over the lower reaches of the Yangtze River during the periods May-July 2006-2009 by using the Japan reanalysis data with high spatial resolution.The results show that mesoscale vortices (disturbances) are often generated in the lower troposphere and planetary boundary layer (PBL).Thus,the mesoscale vortices in this area during the meiyu period could be divided into three types:PBL mesoscale vortices,lower troposphere mesoscale vortices,and lower troposphere-PBL mesoscale vortices.Some of the PBL mesoscale vortices,called PBL mesoscale disturbance vortices (PMDVs),are closely related to rainstorms.Within this group,two distinct patterns of precipitation organization have been identified.One is classified as the MCS-PMDV,which means a mesoscale convection system (MCS) formed before the PMDV.The other is the PMDV-MCS,which is a rainstorm caused by a PMDV.The features of PMDV-MCSs could be identified as follows:a shear line and a low-level jet at 850 hPa,a closed vortex at 925 hPa,and a rainstorm center lying southeast and northeast of the vortex.关键词
梅雨期暴雨/中尺度涡旋/分析统计/PMDVKey words
Meiyu rainstorm/ Mesoscale vortex/ Statistical analysis/ PBL mesoscale disturbance vortex (PMDV)分类
天文与地球科学引用本文复制引用
沈杭锋,翟国庆,尹金方,张文滨,查贲..长江下游梅汛期中尺度涡旋特征分析[J].大气科学,2013,37(4):923-932,10.基金项目
国家自然科学基金资助项目41175047,浙江省气象局青年科技项目2012QN02 （）
