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气象:2016,42(2):254-260
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2015年11月大气环流和天气分析
(国家气象中心,北京 100081)
Analysis of the November 2015 Atmospheric Circulation and Weather
(National Meteorological Centre, Beijing 100081)
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投稿时间:2015-12-25    修订日期:2016-01-02
中文摘要: 2015年11月环流特征如下:北半球极涡呈单极型分布,中高纬西风呈3波型分布,南支槽平均位置大致位于90°E附近,同时,西太平洋副热带高压较常年同期偏西、强度偏强。11月全国平均降水量39.4 mm,较常年同期偏多1.1倍;全国平均气温为4.1℃,较常年同期偏高1.2℃,但华北、东北等地气温偏低。月内共出现2次冷空气过程和4次主要降水过程,江南、华南等地部分地区雨量偏多2~3倍,多站出现极端日降水量;月内还有3次重污染天气过程。
Abstract:The main characteristics of the general atmospheric cirulation in November 2015 are listed as follows: There is one polar vortex centre in the Northern Hemisphere. In the mid high latitudes, the circulation presents a three wave pattern. The average south branch trough is located around 90°E. The northwestern Pacific subtropical high is stronger than normal, located more westward. Meanwhile, monthly mean precipitation amount is 39.4 mm, which is 1.1 times more than its climatological mean. Monthly mean temperature is 4.1℃, being 1.2℃ higher than normal except the North and Northeast China. Two cold air processes and 4 severe rainfall events take place with extreme precipitation records observed at some stations in China. Moreover, the precipitation amount of Jiangnan, South China and other parts is 2-3 times more than normal. In addition, three heavy pollution weather processes are experienced during this month.
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沈晓琳,何立富,2016.2015年11月大气环流和天气分析[J].气象,42(2):254-260.
SHEN Xiaolin,HE Lifu,2016.Analysis of the November 2015 Atmospheric Circulation and Weather[J].Meteor Mon,42(2):254-260.