安徽农业科学2011，Vol.39Issue(5)：2760-2764,5.
江淮流域一次急流暴雪的成因分析
Analysis on the Cauae of a Jet Heavy snow in the Yangtze-Huaihe River Basin
苏爱芳 1范学峰 2李周 3谷秀杰2
作者信息
- 1. 南京信息工程大学,江苏南京,210044
- 2. 河南省气象台,河南郑州,450003
- 3. 河南省气象局,河南郑州,450003
- 折叠
摘要
Abstract
Based on NCEP/NCAR reanalysis and conventional synoptic meteorology data,the jet heavy snow process in the Yangtze-Huaihe River Basin was analyzed. which occurred from January 27 to 28 in 2008. The results showed that the low-level southwest jet was the important synoplic system. The jet's enhancement and north mising led to the increase of dynamic and moisture convergence,which was benefit to heavy snow. The relationship was consangineous between the increase of snowfall intensity and the low-level jet's exit boundary positive vorticity.The thickness increase of the upper air positive vorticity had indicative significance for the forecast of heavy snow amplification period to some extent. The upper air suction effect was also propitious to the enhancement of snow. The superimposed area between high-level's absolute value of upright helicity and the low-level's vapor flux area was close to the predicted area of heavy snow.关键词
暴雪/急流/垂直螺旋度/湿位涡Key words
Heavy snow/ Torrent/ Vertical helicity/ Moist potential vorticity分类
天文与地球科学引用本文复制引用
苏爱芳,范学峰,李周,谷秀杰..江淮流域一次急流暴雪的成因分析[J].安徽农业科学,2011,39(5):2760-2764,5.
