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投稿时间：2013-04-19 修订日期：2013-04-25
投稿时间：2013-04-19 修订日期：2013-04-25
中文摘要: 2013年3月大气环流特征为：北半球极涡呈偏心型，两个中心分别位于欧洲和亚洲北部，极涡范围较常年偏南，中高纬环流呈4波型，南支槽略偏弱，西北太平洋副热带高压(以下简称副高)略偏强。下旬南支活动加强，南方降水增多。全国平均降水量为26.1 mm，较常年同期偏少11.5%。平均气温为6.3℃，较常年同期偏高2.2℃，为1961年以来第二高值。月内发生5次冷空气过程，其中8—11日出现2013年以来最大范围沙尘天气；出现5次主要降水过程，其中19—20日江南、华南出现2013年以来最大范围强对流天气。
中文关键词: 沙尘， 强对流， 冷空气， 环流形势
Abstract:The following are the main characteristics of the general circulation of atmosphere in March 2013. The polar vortex in the Northern Hemisphere lies further south than normal years. It has two centers, located over Europe and Northern Asia, respectively. There are four waves around the earth in middle high latitudes. The south branch trough is slightly weaker than the normal, and the Northwestern Pacific subtropical high is slightly stronger. The average precipitation around 〖JP2〗China is 26.1 mm, 11.5% less than the normal. The monthly mean temperature is 6.3℃, 2.2℃ higher than the normal, which is the 2nd highest value since 1961. There are 5 cold surge processes, during which the largest scale dust weather occurs from 8th to 11th March. Five major rainfall processes are seen in this month, and from 19th to 20th, Jiangnan and South China region experience the largest scale severe convective weather so far in this year.〖JP〗
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基金项目:
| Author Name | Affiliation |
| ZHANG Bihui | National Meteorological Centre, Beijing 100081 |
| SUN Jun | National Meteorological Centre, Beijing 100081 |
引用文本：
张碧辉,孙军,2013.2013年3月大气环流和天气分析[J].气象,39(6):794-800.
ZHANG Bihui,SUN Jun,2013.Analysis of the March 2013 Atmospheric Circulation and Weather[J].Meteor Mon,39(6):794-800.
张碧辉,孙军,2013.2013年3月大气环流和天气分析[J].气象,39(6):794-800.
ZHANG Bihui,SUN Jun,2013.Analysis of the March 2013 Atmospheric Circulation and Weather[J].Meteor Mon,39(6):794-800.