摘要
2024年1月大气环流的主要特征是:北半球极涡呈偶极型分布,欧亚中高纬环流呈纬向“两槽一脊”型,东亚大槽偏东。1月,全国平均降水量为16.3 mm,较常年同期(14.1 mm)偏多15.6%;全国平均气温-3.8℃,较常年同期(-4.8℃)偏高1.0℃。月内气温起伏较大,出现了1次全国型寒潮过程和2次大范围持续性雾-霾天气过程。其中20—22日的寒潮天气过程具有影响范围广、降温幅度大、大风持续时间长、暴雪极端性强等特点。
The main characteristics of the general atmospheric circulation in January 2024 are as follows.There were two polar vortex centers in the Northern Hemisphere.The Eurasian mid-and high-latitude circulation showed a two-trough-one-ridge pattern.The East Asian trough was more eastward.The monthly mean precipitation(16.3 mm)over China was 15.6%more than normal(14.1 mm).The monthly average temperature was-3.8℃,which was 1.0℃higher than that in the same period of normal years.Cold and warm temperatures fluctuated greatly during the month.There was one nationwide cold wave process and two widespread persistent fog-haze weather processes,among which the cold wave weather process from 20 to 22 January presented the characteristics of a wide range of influence,and cooling,long duration of strong wind and heavy snowstorm.
作者
谢超
桂海林
尤媛
XIE Chao;GUI Hailin;YOU Yuan(National Meteorological Centre,Beijing 100081)
出处
《气象》
CSCD
北大核心
2024年第4期514-520,共7页
Meteorological Monthly
基金
国家重点研发计划(2022YFC3701205)资助。
关键词
大气环流
寒潮
暴雪
雾-霾
atmospheric circulation
cold wave
snowstorm
fog-haze
