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气象:2016,42(7):898-904
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2016年4月大气环流和天气分析
(国家气象中心,北京 100081)
Analysis of the April 2016 Atmospheric Circulation and Weather
(National Meteorological Centre, Beijing 100081)
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投稿时间:2016-05-19    修订日期:2016-06-06
中文摘要: 2016年4月大气环流特征为,极涡呈偶极型分布,主体强度较常年偏弱;中高纬环流呈4波型分布,北半球副热带高压面积偏大、强度偏强,西太平洋副热带高压北界维持在20°N附近,中纬度多短波槽活动。4月我国平均气温为12.6℃,较常年同期偏高1.6℃,为历史同期第二高值。我国平均降水量为62.2 mm,较常年同期偏多39.1%。月内我国共有3次主要冷空气过程,北方地区出现4次沙尘天气过程。我国南方降水过程频繁,共出现10次大到暴雨降水过程,江南、华南等地出现短时强降水、雷雨大风等强对流天气。
Abstract:The following are the main characteristics of the general circulation of atmosphere in April 2016. There were two polar vortex centers in the Northern Hemisphere, and the strength of main polar vortex center was weaker than normal. There were four waves around the earth in middle high latitudes. The position and strength of East Asia trough and south branch were close to normal annual means. The area and strength of subtropical high in the Northern Hemisphere were stronger than annual means and the northern boundary of Northwestern Pacific subtropical high maintained near 20° N. Moreover, shortwave trough in low latitudes was active than usual. In April, the monthly mean temperature of China is 12.6℃, 1.6℃ higher than usual, being the second highest value in record for the same period. The mean precipitation of China is 62.2 mm in April, 39.1% higher than usual. There were three cold air events over the country, and four sand dust events in the north of China in April. Rainfalls were seen frequently in the south of China, and 10 heavy rain processes occurred during the month. In addition, several severe convective weather events such as short time severe precipitation, thunderstorm and gales in Jiangnan Region and Huanan Region of China.
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基金项目:中国气象局预报预测核心业务发展专项(CMAHX20160301)资助
引用文本:
陶亦为,张芳华,刘涛,2016.2016年4月大气环流和天气分析[J].气象,42(7):898-904.
TAO Yiwei,ZHANG Fanghua,LIU Tao,2016.Analysis of the April 2016 Atmospheric Circulation and Weather[J].Meteor Mon,42(7):898-904.