| 江淮流域一次急流暴雪的成因分析 |
| |
| 引用本文： | 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, 0(5): 2760-2764 |
| |
| 作者姓名： | 苏爱芳 范学峰 李周 谷秀杰 |
| |
| 作者单位： | 南京信息工程大学;河南省气象台;河南省气象局; |
| |
| 摘 要： | 采用NCEP/NCAR再分析资料和常规天气学资料,对2008年1月27~28日江淮流域出现的急流暴雪过程进行分析。结果表明,低空西南急流是影响大暴雪的主要系统,急流的加强北抬导致江淮流域动力辐合和水汽辐合的加大,有利于降雪强度的加大。降雪强度的增加与低空急流出口处正涡度的增长关系密切,高空正涡度厚度的增加对暴雪增幅期的预报有一定的指示意义,高空抽吸作用也是降雪加强的动力学机制。高低空垂直螺旋度绝对值高值区和低空水汽通量高值区的叠加区域与暴雪落区关系密切。
|
| 关 键 词： | 暴雪 急流 垂直螺旋度 湿位涡 |
Analysis on the Cause of a Jet Heavy Snow in the Yangtze-Huaihe River Basin |
| |
| SU Ai-fang et al. Analysis on the Cause of a Jet Heavy Snow in the Yangtze-Huaihe River Basin[J]. Journal of Anhui Agricultural Sciences, 2011, 0(5): 2760-2764 |
| |
| Authors: | SU Ai-fang et al |
| |
| Affiliation: | SU Ai-fang et al (Nanjing University of Information Science and Technology,Nanjing,Jiangsu 210044) |
| |
| 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 synoptic system.The jet's enhancement and north raising led to the increase of dynamic and moisture convergence,which was benefit to heavy snow.The relationship was consanguineous between the increase of snowfall intensity and the low-level jet's exi... |
| |
| Keywords: | Heavy snow Torrent Vertical helicity Moist potential vorticity |
| 本文献已被 CNKI 维普 等数据库收录！ |
|
