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气象:2019,45(4):587-592
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2019年1月大气环流和天气分析
赵彦哲,桂海林,李思腾,尤媛
(国家气象中心,北京 100081, 北京城市气象研究院,北京 100089)
Analysis of the January 2019 Atmospheric Circulation and Weather
ZHAO Yanzhe,GUI Hailin,LI Siteng,YOU Yuan
(National Meteorological Centre, Beijing 100081, Institute of Urban Meteorology, CMA, Beijing 100089)
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投稿时间:2019-03-01    修订日期:2019-03-05
中文摘要: 2019年1月大气环流主要特征为:北半球极涡呈偶极型分布,环流呈三波型,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位置偏西,强度偏强。本月,全国平均降水量为14.0 mm,较常年同期(13.5 mm)偏多4%,月内出现三次较强降水过程,江南和西南部分地区降水明显,全国共有35站日降水量达到极端事件标准。全国平均气温为-4.1℃,较常年同期(-5.0℃)偏高0.9℃,共出现4次冷空气过程。本月共发生2次大范围雾 霾天气过程。
Abstract:The main characteristics of the general atmospheric circulation in January 2019 are as follows. There were two polar vortex centers in the Northern Hemisphere. The circulation presented a three wave pattern in middle high latitudes. The average south branch trough was located around 90°E. The northwestern Pacific subtropical high was stronger than normal, located more westward. Meanwhile, monthly mean precipitation over China was 14.0 mm, 4% higher than normal. And three major rainfall processes occurred in this month, and parts of the south of Yangtze River, and Southwest China saw rains obviously. Daily extreme precipitation events occurred at 35 stations. Monthly mean temperature was -4.1℃, 0.9℃ higher than normal, and there were four cold air processes in this month.Meanwhile, there were two large scale fog haze weather processes as well.
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赵彦哲,桂海林,李思腾,尤媛,2019.2019年1月大气环流和天气分析[J].气象,45(4):587-592.
ZHAO Yanzhe,GUI Hailin,LI Siteng,YOU Yuan,2019.Analysis of the January 2019 Atmospheric Circulation and Weather[J].Meteor Mon,45(4):587-592.