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气象:2014,40(4):515-520
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2014年1月大气环流和天气分析
(国家气象中心,北京 100081)
Analysis of the January 2014 Atmospheric Circulation and Weather
(National Meteorological Centre, Beijing 100081)
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投稿时间:2014-02-24    修订日期:2014-03-03
中文摘要: 2014年1月大气环流主要特征如下:北半球极涡呈偶极型分布,位置较常年同期明显偏南;欧亚中高纬环流经向度较小;南支槽平均位置位于70°E附近,位置较常年同期明显偏西;同时,西太平洋副热带高压较常年同期略偏弱。1月,全国平均降水量为6.2 mm,较常年同期(13.2 mm)偏少53.0%。全国平均气温为-3.4℃,较常年同期(-5.0℃)偏高1.6℃。月内,我国出现1次主要冷空气过程和4次主要降水过程。北方冬麦区降水偏少,气象干旱持续;中东部地区出现大范围雾或霾天气;南方地区出现低温雨雪天气
Abstract:The following are the main characteristics of the general circulation of atmosphere in January 2014. There are two polar vortex centers in the Northern Hemisphere located more southward than normal years. The circulation presents latitudinal patterns in middle high latitudes. The south branch trough is averagely located near 70°E, being more westward than normal years. Besides, the subtropical high is a little weaker than normal years. The monthly mean precipitation is 6.2 mm, 53.0% less than the normal (13.2 mm). The monthly mean temperature is -3.4℃, 1.6℃ higher than the normal (-5.0℃). There is one cold air process nationwide and four rainfall processes in the month. Lack of rainfall has caused meteorological drought in the northern winter wheat region. Meanwhile, large scale fog and haze weather appear in the central and the east of China. Moreover, cryogenic snow weather hit the south of China.
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赖芬芬,马学款,2014.2014年1月大气环流和天气分析[J].气象,40(4):515-520.
LAI Fenfen,MA Xuekuan,2014.Analysis of the January 2014 Atmospheric Circulation and Weather[J].Meteor Mon,40(4):515-520.