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气象:2017,43(5):634-640
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2017年2月大气环流和天气分析
毛旭, 张涛
(国家气象中心,北京 100081)
Analysis of the February 2017 Atmospheric Circulation and Weather
MAO Xu, ZHANG Tao
(National Meteorological Centre, Beijing 100081)
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投稿时间:2017-03-23    修订日期:2017-03-28
中文摘要: 2017年2月大气环流的主要特征是极涡偏强且呈单极偏心型分布,中高纬环流呈3波型,西太平洋副热带高压强度接近常年,南支槽强度较常年偏弱。2月全国平均气温0℃,较常年同期偏高1.7℃;全国平均降水量14.4 mm,比常年同期(17.4 mm)偏少17.1%。2月我国有两次强冷空气过程;3次降水过程,其中新疆出现了一次暴雪过程,日降水量打破历史极值;中东部出现两次雾 霾天气。
Abstract:The main characteristics of the general atmospheric circulation in February 2017 are as follows. There was one polar vortex center in the Northern Hemisphere and stronger than usual. The circulation in Eurasian middle high latitudes showed a three wave pattern. The strength of western Pacific subtropical high was near climatological normal. The south branch trough was a little weaker than normal years. The monthly mean temperature was 0℃, which is 1.7℃ higher than normal, while the monthly mean precipitation amount was 14.4 mm, which is 17.1% less than normal. Two waves of strong cold air processes and three rainfall processes occurred during this month. Because of the second wave of strong cold air process, a snowstorm event was seen in Xinjiang, with the daily precipitation breaking the historical extremum. Meanwhile, two fog haze weather events appeared in the central and eastern part of China.
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毛旭,张涛.2017年2月大气环流和天气分析[J].气象,2017,43(5):634-640.
MAO Xu,ZHANG Tao.Analysis of the February 2017 Atmospheric Circulation and Weather[J].METEOROLOGICAL MONTHLY,2017,43(5):634-640.