摘要
2016年2月大气环流的主要特征是北半球极涡呈偶极型分布,中高纬环流经向度大;太平洋副热带高压接近常年同期或偏强,南支槽较常年同期偏弱,不利于水汽向我国输送。2月全国平均降水量12.3 mm,较常年同期(17.4 mm)偏少29.3%,全国平均气温-1.6℃,接近常年同期(-1.7℃)。月内,我国中东部大部地区出现一次寒潮天气过程;西北地区出现今年首次沙尘天气过程。
The main characteristics of the general atmospheric circulation in February 2016 are as follows：There are two polar vortex centers in the Northern Hemisphere.The circulation presents meridional patterns in middle-high latitudes.The south branch trough behaves actively,and the mean position is located at 90°E nearby.The subtropical high is a little weaker than normal years,and the average south branch trough is also weaker than normal years.The monthly mean precipitation is 12.3 mm,and 29.4%less than normal（17.4 mm）.The monthly mean temperature is- 1.6℃,and 0.1℃ higher than normal（-1.7℃）.There is one cold wave process nationwide.Meanwhile,sand-dust weather first appeared in Northwest China this year.
出处
《气象》
CSCD
北大核心
2016年第5期643-648,共6页
Meteorological Monthly
关键词
大气环流
寒潮
沙尘
atmospheric circulation
cold wave
sand-dust weather
