气象与环境学报2013，Vol.29Issue(4)：11-17,7.DOI:10.3969/j.issn.1673-503X.2013.04.002
Q矢量和湿位涡在梅雨期区域性暴雨中的诊断分析
Diagnosis analysis of regional rainstorm in Meiyu rain period using Q vector and moist potential vorticity
摘要
Abstract
Based on the conventional surface observation data,the precipitation data from automatic weather stations and the NCEP reanalysis data,a rainstorm process on June 19-21,2010 in the middle and lower reaches of the Yangtze River was diagnosed by Q vector and moist potential vorticity theory.The results indicate that the lower level shear moves slowly southeastwards which causes the rainstorm.The region that has big absolute values of the Q vector and Q vector frontogenesis function is corresponding to the strong rain band and their values change with rainfall,while the big value center of Q vector frontogenesis function and the rainfall center are sometimes not consistent.The change of Q vector divergence coincides with that of rain band center.The strong rainfall band is situated on the dense contour area with transition between positive and negative value of MPV1 and increasing gradient of MPV1 is corresponding to rainfall enhancement,and vice versa.关键词
区域性暴雨/Q矢量/湿位涡Key words
Regional rainstorm/ Q vector/ Moist potential vorticity分类
天文与地球科学引用本文复制引用
刘学华,朱宵峰,梁亮..Q矢量和湿位涡在梅雨期区域性暴雨中的诊断分析[J].气象与环境学报,2013,29(4):11-17,7.基金项目
浙江省气象局青年科技专项(2010QN05)资助. （2010QN05）
