现代农业科技Issue(23)：262-264,266,4.
甘肃省河西地区2次强寒潮天气过程分析
Analysis on Twice Strong Cold Wave Weather Processes in Hexi Region of Gansu Province
摘要
Abstract
In this paper,the characteristics of the twice cold wave during the spring on March 12 to March 14 in 2011 and April 22 to April 24 in 2012 in Hexi Corridor region were compared and analyzed from the aspects of the evolution of circulation patterns that occurred in cold weather process and variation of various physical quantities such as vorticity,vertical speed,temperature advection,etc. The following conclusions were drawn in major:These two typical cold wave weather processes both occurred in spring and occurred in high latitudes in Asia and Europe during the process of the zonal circulation pattern converted to the meridional circulation pattern,and the previous temperature was generally higher abnormally than the same period before. Strong cold advection caused temperatures dropped significantly,clod high pressure on surface develop intensively and form cold wave weather in Hexi region eventually. But,there were some different circulation situations between the twice processes,so was the strength of the two weather processes.关键词
寒潮/环流形势/物理量/甘肃省/河西地区Key words
cold wave/circulation situation/physical quantities/Gansu Province/Hexi region分类
天文与地球科学引用本文复制引用
尹春,刘抗,何金梅,王有生..甘肃省河西地区2次强寒潮天气过程分析[J].现代农业科技,2015,(23):262-264,266,4.基金项目
甘肃省乡镇精细化客观要素预报的改价与优化. （）
