气象与环境学报2016，Vol.32Issue(5)：40-46,7.DOI:10.3969/j.issn.1673-503X.2016.05.006
辽宁地区大暴雨环境场和物理量场合成分析
Composite analysis of environmental and physical quantity fields of heavy rainstorm in Liaoning province
摘要
Abstract
Based on data from 61 national observation stations from 1960 to 2013 and NCEP (National Centers for Environmental Prediction)reanalysis data,the environmental and physical quantity fields of a rainstorm at multiple time periods in Liaoning province were synthetically analyzed using synoptic meteorology and physical diagnosis methods.Sixty regional heavy rainstorm processes were selected in this study.The results show that the heavy rain-storms in Liaoning province are controlled by the interacting results among polar,westerlies,subtropic and tropic systems.The cold polar air that is entrained by cold shear lines at low layer invades Liaoning province from a more northerly path.A low-level jet is strengthened by the eastward movement of the westerly shortwave trough.It makes the ground convergence line form a front and at last triggers a heavy regional rainstorm.The falling area and strength of heavy rainstorm in Liaoning province are related to the paths and strengths of the low-level jet and cold and warm air.The moisture and thermal conditions are the bases for the generation of a heavy rainstorm.The dy-namic uplifting condition is a determining factor for the intensity of precipitation.It proves that the composite anal-ysis of environmental and physical quantity fields can reveal the common issue in the heavy rainstorm in Liaoning province.It expects that this work could provide a useful reference for forecasting heavy rainstorm in Liaoning province in the future.关键词
大暴雨/环境场/物理量场/合成分析/影响系统Key words
Heavy rainstorm/Environmental field/Physical quantity field/Composite analysis/Influence System分类
天文与地球科学引用本文复制引用
孙欣,陈传雷,梁寒,杨青,贺慧,陆井龙,赵明..辽宁地区大暴雨环境场和物理量场合成分析[J].气象与环境学报,2016,32(5):40-46,7.基金项目
中国气象局预报员专项（CMAYBY2015015）和中国气象局预报预测核心业务发展专项（CMAHX20160103）共同资助。 （）
