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气象:2023,49(5):633-640
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2023年2月大气环流和天气分析
权婉晴,孙军
(国家气象中心,北京 100081)
Analysis of the February 2023 Atmospheric Circulation and Weather
QUAN Wanqing,SUN Jun
(National Meteorological Centre, Beijing 100081)
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投稿时间:2023-04-07    修订日期:2023-04-25
中文摘要: 2023年2月,大气环流的主要特征为,北半球极涡呈偶极型,次中心位于鄂霍次克海,强度较常年偏强;欧亚中高纬地区由多槽型转变为“两槽一脊”型。我国中高纬度大部处于高压脊前锋区内,槽前为正距平,冷空气活动较多但强度偏弱,南支槽位置强度接近常年同期,导致我国北方地区多雨雪天气过程,南方地区出现阶段性阴雨寡照天气。全国平均气温为0.3℃,较常年同期偏高1.6℃,全国平均降水量为15.5 mm,较常年同期偏少5%。
Abstract:The main characteristics of the general atmospheric circulation in February 2023 are as follows. Two polar vortex centers existed in the Northern Hemisphere, with the sub-center located along the Sea of Okhotsk and stronger than normal. The atmospheric circulation over mid-high latitudes of Eurasia changed from multi-wave type to “two-trough-and-one-ridge” type. Most of the mid-high latitude region of China was in the frontal zone ahead of ridge, with a positive anomaly before the trough range, so the associated cold air activities were more in number but weaker in intensity. The southern branch trough with regular position and intensity held a more frequency of rain and snow events in the northern China and phased continuously rainy weather in the southern China. The February average temperature over China was 0.3℃, 1.6℃ warmer than normal, and the monthly average precipitation was 15.5 mm, 5% less than normal.
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基金项目:国家重点研发计划(2021YFC3000900)资助
引用文本:
权婉晴,孙军,2023.2023年2月大气环流和天气分析[J].气象,49(5):633-640.
QUAN Wanqing,SUN Jun,2023.Analysis of the February 2023 Atmospheric Circulation and Weather[J].Meteor Mon,49(5):633-640.