气象2017，Vol.43Issue(7)：894-900,7.DOI:10.7519/j.issn.1000-0526.2017.07.014
2017年4月大气环流和天气分析
Analysis of the April 2017 Atmospheric Circulation and Weather
摘要
Abstract
The main characteristics of the general atmospheric circulation in April 2017 are as follows.Double polar vortex centers existed in the Northern Hemisphere,but weaker than usual.The circulation in Eurasian middle-high latitude showed a four-wave pattern.The strength of Western Pacific subtropical high is stronger than that in normal years.While the south branch trough was almost equal to normal.The monthly mean temperature was 12.0℃,1.0℃ higher than normal,and the monthly mean precipitation amount was 44.0 mm,which was 2％ less than normal.One nationwide strong cold air process happened in this month.There were more precipitation weather events in southern China in this month,with three regional rainstorm processes seen.In addition,two blowing sand weather events happened in the northern China and hail disaster attacked some places of many provinces.关键词
大气环流/沙尘/暴雨/强对流Key words
atmospheric circulation/dust weather/heavy rain/severe convection分类
天文与地球科学引用本文复制引用
万子为,张涛..2017年4月大气环流和天气分析[J].气象,2017,43(7):894-900,7.基金项目
国家重点基础研究发展计划(973计划)(2013CB430106)和国家自然科学基金项目(41375051)共同资助 （973计划）
