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引用本文:毛旭,张涛.2017.2017年2月大气环流和天气分析.气象,43(5):634-640.
2017年2月大气环流和天气分析
Analysis of the February 2017 Atmospheric Circulation and Weather
投稿时间:2017-03-23  最后修改时间:2017-03-28
DOI:10.7519/j.issn.1000-0526.2017.05.013
中文关键词: 大气环流,冷空气,雨雪天气,雾 霾
英文关键词: atmospheric circulation, cold air, rain and snow weather, fog haze
基金项目:
作者单位
毛旭 国家气象中心北京 100081 
张涛 国家气象中心北京 100081 
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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。
英文摘要:
      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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