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气象:2022,48(8):1070-1076
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2022年5月大气环流和天气分析
韩旭卿,张涛
(国家气象中心,北京 100081)
Analysis of the May 2022 Atmospheric Circulation and Weather
HAN Xuqing,ZHANG Tao
(National Meteorological Centre, Beijing 100081)
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投稿时间:2022-07-01    修订日期:2022-07-09
中文摘要: 2022年5月大气环流的主要特征是:北半球极涡呈单极型分布,强度偏强;中高纬完成了从冬季三波型向夏季四波型的转换,环流呈四波型,欧亚环流经向度较大,副热带高压和南支槽强度与常年相当。全国平均气温为16.7℃,较常年同期偏高0.2℃。全国平均降水量为71.6 mm,较常年同期偏多2%,其中西南及华南地区降水较常年显著偏多。月内,全国范围内共发生4次区域性暴雨天气过程,多省遭受风雹袭击,部分地区受灾较重。此外,3次冷空气过程影响我国,3次沙尘过程影响北方地区,黄淮、江淮等地气象干旱持续发展。
Abstract:The main characteristic of the general atmospheric circulation in May 2022 is that the single polar vortex center in the Northern Hemisphere was stronger than usual. The circulation finished the transition from a three-wave pattern to a four-wave pattern, the 500 hPa geopotential height presented the distribution of a four-wave pattern in middle-high latitudes of the Northern Hemisphere, and the degree of meridionality was stonger than normal. The strength of Western Pacific subtropical high and the south branch trough were similar to those in normal years. The monthly mean temperature was 16.7°C, 0.2°C higher than normal. The monthly mean precipitation amount was 71.6 mm, 2% more than normal, of which the precipitation in Southwest China and South China was significantly more than in the normal year. Four regional rainfall processes occurred in China this month and several provinces were attacked by gales and hailstorm, which led to economic losses and casualties to some degrees. In addition, three cold air processes occurred this month, and the northern part of China experienced three sand-dust weather events. The drought maintained or developed in the Huanghuai and Jianghuai Regions.
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基金项目:国家重点研发计划(2017YFC1052000)资助
引用文本:
韩旭卿,张涛,2022.2022年5月大气环流和天气分析[J].气象,48(8):1070-1076.
HAN Xuqing,ZHANG Tao,2022.Analysis of the May 2022 Atmospheric Circulation and Weather[J].Meteor Mon,48(8):1070-1076.