气象2018，Vol.44Issue(4)：590-596,7.DOI:10.7519/j.issn.1000-0526.2018.04.013
2018年1月大气环流和天气分析
Analysis of the January 2018 Atmospheric Circulation and Weather
摘要
Abstract
The main characteristics of the general atmospheric circulation in January 2018 are as follows. There were two polar vortex centers in the Northern Hemisphere.The circulation presented a four-wave pattern in middle-high latitudes.The East Asian trough behaved strongly.The monthly mean precipita-tion was 1 9.6 mm,48.4% more than normal.Besides,the activities of cold air strengthened,causing the monthly mean temperature (-5.3℃) to turn from higher than normal to lower,and the mean temperature became 0.3℃ lower than normal (-5.0℃).In this month,precipitation was strengthened with more rainfall than normal,and freezing rain and snow weather occurred in southern China and Shaanxi Province, similar to the freezing disaster in southern China in 2008.Fog-haze event appeared in this month only once,from 13 to 22 January 2018,but was characterized by the widest range,the longest duration and the maximum intensity in the winter of 2017.关键词
大气环流/冷空气/降水/雾-霾Key words
atmospheric circulation/cold air/precipitation/fog-haze分类
天文与地球科学引用本文复制引用
刘超,江琪,桂海林..2018年1月大气环流和天气分析[J].气象,2018,44(4):590-596,7.
