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气象:2023,49(4):506-512
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2023年1月大气环流和天气分析
尤媛,饶晓琴,李思腾,王继康
(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 2023 Atmospheric Circulation and Weather
YOU Yuan,RAO Xiaoqin,LI Siteng,WANG Jikang
(National Meteorological Centre, Beijing 100081; Institute of Urban Meteorology, Beijing 100089)
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投稿时间:2023-02-28    修订日期:2023-03-07
中文摘要: 2023年1月大气环流的主要特征是:北半球极涡呈偶极型分布,东北亚低涡偏强。东亚大槽偏东,南支槽偏弱。1月全国平均降水量为8.8 mm,较常年同期(14.3 mm)偏少38%;全国平均气温为-4.4℃,较常年同期(-4.8℃)偏高0.4℃。月内气温冷暖起伏较大,中下旬出现3次冷空气过程,气温由上旬异常偏暖逆转为下旬普遍偏冷的格局,黑龙江出现极寒天气,漠河最低气温达-53℃,刷新我国最低气温纪录。13—16日出现年度首次大范围寒潮天气,具有降温剧烈、风力大、雨雪范围广等特点,新疆、陕西、山西、河南等地出现大雪或暴雪,北方地区出现首次沙尘天气过程。此外,上旬大气扩散和湿清除条件较为不利,出现持续性雾 霾天气。
Abstract:The main characteristics of the general atmospheric circulation in January 2023 are as follows. There were two polar vortex centers in the Northern Hemisphere. The Northeast Asia low vortex was stronger. The East Asian major trough was more eastward than normal, and the south branch trough was weaker. Meanwhile, the monthly mean precipitation over China was 8.8 mm, which is 38% less than normal (14.3 mm). The monthly mean temperature was -4.4℃, 0.4℃ higher than normal (-4.8℃). There were three cold air processes in the middle and late of the month, and the temperature changed from abnormally warm in the early 10 days to generally cold in the late 10 days. In addition, extremely cold weather appeared in Heilongjiang Province with the lowest temperature in Mohe declining to as low as -53℃, setting a new record of the lowest temperature in China. From 13 to 16 January, the first large scale cold wave of this year occurred, characterised by severe cooling, strong winds and wide range of rain and snow. Xinjiang, Shaanxi, Shanxi, Henan and other provinces experienced heavy snow or blizzard. Besides, the first dust weather affected northern China, and in the first dekad, the atmospheric diffusion and wet clearance conditions were not good so that persistent haze weather stayed for days.
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基金项目:国家自然科学基金联合基金项目(U2242209)
引用文本:
尤媛,饶晓琴,李思腾,王继康,2023.2023年1月大气环流和天气分析[J].气象,49(4):506-512.
YOU Yuan,RAO Xiaoqin,LI Siteng,WANG Jikang,2023.Analysis of the January 2023 Atmospheric Circulation and Weather[J].Meteor Mon,49(4):506-512.