| 2012年3月大气环流和天气分析 |
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| 引用本文： | 樊利强,孙谨.2012年3月大气环流和天气分析[J].气象,2012,38(6):751-757. |
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| 作者姓名： | 樊利强 孙谨 |
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| 作者单位： | 国家气象中心,北京,100081 |
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| 基金项目： | 国家气象中心青年基金（220099011001002009）资助 |
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| 摘 要： | 2012年3月大气环流主要特征是:北半球极涡呈多极型分布,强度较常年同期略偏强;中高纬度环流呈4波型分布,中低纬地区南支槽略偏强,有利西南暖湿空气向我国的输送;西太平洋副热带高压强度偏弱。3月全国平均气温为3.5℃,比常年同期(3.8℃)略偏低0.3℃。全国平均降水量为31.4 mm,较常年同期(28.9 mm)偏多8.7%。月内我国出现了3次主要的冷空气过程,北方出现今年首次沙尘天气过程,南方持续低温阴雨天气。
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| 关 键 词： | 大气环流 冷空气 暴雨 沙尘 |
| 收稿时间： | 2012/4/26 0:00:00 |
| 修稿时间： | 2012/5/17 0:00:00 |
Analysis of the March 2012 Atmospheric Circulation and Weather |
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| FAN Liqiang and SUN Jin.Analysis of the March 2012 Atmospheric Circulation and Weather[J].Meteorological Monthly,2012,38(6):751-757. |
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| Authors: | FAN Liqiang and SUN Jin |
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| Institution: | National Meteorological Centre, Beijing 100081;National Meteorological Centre, Beijing 100081 |
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| Abstract: | The following are the main characteristics of the general circulation of atmosphere in March 2012.There are multi-polar vortex centers in the Northern Hemisphere with slightly stronger strength than normal years.The circulation presents a four-wave pattern in middle-high latitudes.The south branch trough is slightly stronger than normal years and the situation is favorable for the transportation of water vapor.The strength of the Western Pacific subtropical high is weaker than normal years.The monthly mean temperature is 3.5℃,which is lower than the same period of normal years.The mean precipitation (31.4 mm)is 8.7%more than normal.There are 3 cold surge processes affecting China in this month,the first sand and dust weather process appeared in northern China,and the continuous low temperature and rainy weather occurred in southern China for a long time. |
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| Keywords: | atmospheric circulation cold air heavy rain sand and dust weather |
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