气象2016，Vol.42Issue(3)：382-388,7.DOI:10.7519/j.issn.1000-0526.2016.3.014
2015年12月大气环流和天气分析
Analysis of the December 2015 Atmospheric Circulation and Weather
摘要
Abstract
The main characteristics of the general atmospheric circulation in December 2015 are as follows:There is one polar vortex center in the Northern Hemisphere,located near Greenland.The Eurasia mid-high latitude circulation presents the trough-ridge-trough pattern.The south branch trough behaves ac-tively,lying around 90°E averagely.The subtropical high is stronger and has larger area than normal years.The monthly mean temperature over China is -2 .1℃,1 .1℃ higher than normal (-3 .2℃).The distribution of precipitation is inhomogeneous.Large-scale rainy weather appears in the southern part of China.The monthly precipitation in the south of the Yangtze River and South China is 100-200 mm,and for the whole country it is 24.1 mm,1.3 times more than normal (10.5 mm),which is the maximum value for the corresponding periods since 1951.There are three cold air processes,three major rainfall processes and two large-scale fog-haze weather processes during this month,of which the fog-haze event from 19 to 25 December is characterized by long duration,large scale and heavy air pollution,and the haze affected ar-ea is the largest in 2015.关键词
大气环流/暴雨/雾-霾/冷空气Key words
atmospheric circulation/rainstorm/fog-haze/cold air分类
天文与地球科学引用本文复制引用
李明,花丛,马学款..2015年12月大气环流和天气分析[J].气象,2016,42(3):382-388,7.基金项目
公益性行业（气象）科研专项（GYHY201306015）及气象关键技术集成与应用项目（CMAGJ2015M70；CMAGJ2014Z16）共同资助 （）
