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气象:2018,44(8):1110-1116
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2018年5月大气环流和天气分析
周晓敏,张涛
(国家气象中心,北京 100081)
Analysis of the May 2018 Atmospheric Circulation and Weather
ZHOU Xiaomin,ZHANG Tao
(National Meteorological Centre, Beijing 100081)
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投稿时间:2018-06-21    修订日期:2018-07-05
中文摘要: 2018年5月大气环流的主要特征是北半球极涡呈偶极型分布,强度偏强;中高纬环流呈三波型,欧亚环流经向度不大;西太平洋副热带高压偏强,南支槽强度比常年略偏弱。全国平均气温为17.1℃,较常年同期(16.2℃)偏高0.9℃,全国平均降水量73.1 mm,较常年同期(69.5 mm)偏多5.2%。月内,我国南方地区出现7次大范围强降雨天气过程,且多省遭受风雹袭击,局部地区受灾较重。此外,东北地区发生干旱,下旬有所缓和;中下旬江南、华南地区出现持续高温天气;北方地区出现2次沙尘天气过程。
Abstract:The main characteristics of the general atmospheric circulation in May 2018 are as follows. Two polar vortex centers were in the Northern Hemisphere and stronger than usual. The circulation at middle high latitudes of the Eurasian showed a three wave pattern, and the degree of meridionality was lower than normal. The strength of Western Pacific subtropical high was stronger than the climatological normal, and the Bay of Bengal trough is slightly weaker than normal. The monthly mean temperature was 17.1℃, higher than normal (16.2℃) by 0.9℃. The monthly mean precipitation amount was 73.1 mm, more than normal by 5.2%. Seven severe rainfall events occurred in southern China this month, and several provinces were attacked by severe thunderstorms and hail disaster. In addition, severe droughts took place in the Northeast China, which was weakened in the later part of month. High temperature weather began to persist in southern China from the middle of May, and two dust weather events happened in northern China.
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基金项目:国家重点研发计划(2017YFC1502003)资助
引用文本:
周晓敏,张涛,2018.2018年5月大气环流和天气分析[J].气象,44(8):1110-1116.
ZHOU Xiaomin,ZHANG Tao,2018.Analysis of the May 2018 Atmospheric Circulation and Weather[J].Meteor Mon,44(8):1110-1116.