气象与环境学报2016，Vol.32Issue(2)：11-17,7.DOI:10.11927/j.issn.1673-503X.2016.02.002
安徽地区山地与平原冻雨天气成因及特征分析
Analysis of forming reason of freezing rain weather and its characteristics in mountain and plain of Anhui province
摘要
Abstract
In order to investigate the causes of winter freezing weather and improve freezing rain forecasting accu-racy,synoptic characteristics of a freezing event in February of 2010 in Anhui province were analyzed based on conventional observation data,intensive observation data and the NCEP reanalysis data. At the same time,numeri-cal simulation by a WRF model for this process was performed,and physical field and stratification condition were discussed. The results show that freezing rain in the south mountain area and north plain area of Anhui province is mainly caused by strong cold air moving down south quickly,which makes cold continental high meeting the west-ern Pacific subtropical high and forming a saddle shape pressure field. Analysis of simulation suggests that forming reasons and stratification features of this process in the mountain and plain differ significantly. Forming of freezing rain in the mountain area is related to block and lifting of mountain to cold and warm air,while it needs strong cold air moving southward rapidly in the plain area and produces stratification structure that is favorable to generate freezing rain weather. In the mountain area,it has great temperature inversion gradient and higher cold center height when freezing rain weather occurs. In the plain,it has great negative temperature center and higher cold cen-ter height near the surface when freezing rain weather occurs,while there is not stable corresponding relation with temperature inversion gradient. Generation of freezing rain weather is a complex physics process,and it has rela-tionship with intensity of temperature inversion,height of cold pad and amplitude of temperature change.关键词
冻雨/WRF模式/逆温层/数值模拟Key words
Freezing rain/Weather Research Forecast(WRF)model/Temperature inversion layer/Numerical sim-ulation分类
天文与地球科学引用本文复制引用
江杨,何志新,周昆,朱红芳,王东勇..安徽地区山地与平原冻雨天气成因及特征分析[J].气象与环境学报,2016,32(2):11-17,7.基金项目
安徽省预报员专项“安徽冻雨天气的气象要素分析”（ KY301311）和华中区域气象中心科技发展基金项目“多部多普勒雷达资料在数值模式中的同化应用研究”（ QY-Z-201201）共同资助。 （）
