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投稿时间：2013-03-15 修订日期：2013-03-25
投稿时间：2013-03-15 修订日期：2013-03-25
中文摘要: 2013年2月大气环流主要特征是：北半球极涡呈偶极型分布，强度较常年同期略偏强；中高纬度环流呈3波型分布，中低纬地区南支槽位置偏西，不利于西南暖湿空气向我国内陆的输送；西太平洋副热带高压强度略偏强。2月全国平均气温为-1.2℃，较常年同期偏高0.5℃。全国平均降水量为14.1 mm，较常年同期（17.4 mm）偏少19.0%。月内我国出现了2次全国性冷空气过程，雾霾天气频繁，西藏南部出现特大暴雪，西南地区干旱持续。
中文关键词: 大气环流， 冷空气， 雾霾， 暴雪， 干旱
Abstract:The main characteristics of the general atmospheric circulation in February 2013 are as follows: There were two polar vortex centers in the Northern Hemisphere with more stronger strength than normal years. Atmospheric circulation presented a three wave pattern in middle high latitudes. The south branch trough was to the west, which is not favorable for the transportation of water vapor. The West Pacific subtropica high was stronger than normal years. The monthly mean temperature was -1.2℃， higher than normal. The mean precipitation this month was 14.1 mm, 19.0% less than normal. Two cold air events affected China and fog and haze weather happened many times. Drought still lasted in the southwest of China, and severe snowstorms hit the south of Tibet.
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基金项目:
| Author Name | Affiliation |
| AN Linchang | National Meteorological Centre, Beijing 100081 |
| ZHANG Fanghua | National Meteorological Centre, Beijing 100081 |
引用文本：
安林昌,张芳华,2013.2013年2月大气环流和天气分析[J].气象,39(5):659-664.
AN Linchang,ZHANG Fanghua,2013.Analysis of the February 2013 Atmospheric Circulation and Weather[J].Meteor Mon,39(5):659-664.
安林昌,张芳华,2013.2013年2月大气环流和天气分析[J].气象,39(5):659-664.
AN Linchang,ZHANG Fanghua,2013.Analysis of the February 2013 Atmospheric Circulation and Weather[J].Meteor Mon,39(5):659-664.