气象Issue(12)：1570-1579,10.DOI:10.7519/j.issn.1000-0526.2013.12.005
冷涡背景下京津冀地区连续降雹统计分析
Statistical Analysis of Continuous Hailfall Under the Background of Cold Vortex in the Beijing-Tianjin-Hebei Region
摘要
Abstract
Cold vortex is firstly defined.Using synoptic chart from April to September during 2000-2011, the sptio-temporal distribution and life characteristics of cold vortex are studied.Besides,disaster weather data from 176 stations in Beijing-Tianjin-Hebei region from April to September during 2000-2011 and NCEP 1°×1°reanalysis data are used to analyze the sptio-temporal distribution characteristics of continu-ous hailfall of Beijing,Tianjin,Hebei Region and its relations with cold vortex.The results show that the number of cold vortexes is increasing,which mainly occur from Northeast China to the east of Lake Bai-kal,and long-lived cold vortexes account for 70%.It is the long-lived vortex that causes the continuous haifall in the Beijing-Tianjin-Hebei Region and the continuous hail in the context of cold vortex exhibits significant diurnal variation,appearing more in mountains than on plains,more in the north than in the south.Continuous hail mainly occurs in the south of vortex center,and can occur in any stages of cold vortex.The distance between continuous hail and cold vortex is about 200-1200 km.The continuous hail-falls are mainly affected by the cold vortex and its rear transverse trough,and occur in different position corresponding to cold vortex with different speeds.关键词
冷涡/连续降雹/统计/动态合成Key words
cold vortex/continuous hail/statistics/storm-relative composites分类
天文与地球科学引用本文复制引用
张仙,谌芸,王磊,曾波..冷涡背景下京津冀地区连续降雹统计分析[J].气象,2013,(12):1570-1579,10.基金项目
国家自然科学基金面上项目（41175048）和公益性行业（气象）科研专项（GYHY201206004、GYHY201006005和GYHY200906001）共同资助 （）
