主办单位:中国气象局沈阳大气环境研究所
国际刊号:ISSN 1673-503X
国内刊号:CN 21-1531/P

气象与环境学报 ›› 2025, Vol. 41 ›› Issue (2): 64-73.doi: 10.3969/j.issn.1673-503X.2025.02.008

• 论文 • 上一篇    

2022年湖北省梅雨期和盛夏期气候异常特征及成因分析

孙晨1,2,3, 徐卫立2,4, 杜良敏1,3, 李波2,4, 肖莺1,3   

  1. 1. 武汉区域气候中心, 湖北武汉 430074;
    2. 智慧长江与水电科学湖北省重点实验室, 湖北宜昌 443000;
    3. 三峡国家气候观象台, 湖北宜昌 443002;
    4. 三峡水利枢纽梯级调度通信中心, 湖北宜昌 443000
  • 收稿日期:2023-09-07 修回日期:2023-12-18 发布日期:2025-06-20
  • 通讯作者: 杜良敏,男,正高级工程师,E-mail:duliangmin@gmail.com。 E-mail:duliangmin@gmail.com
  • 作者简介:孙晨,男,1992年生,工程师,主要从事短期气候预测及气候模式研究,E-mail:649026538@qq.com。
  • 基金资助:
    国家重点研发计划(2018YFC150800)、湖北省自然科学基金(2023AFD103)、中国长江电力股份有限公司项目(2421020001)和中国气象局复盘总结专项(FPZJ2024-084)共同资助。

Analysis of climatic anomalies and their causes during the Meiyu season and midsummer in Hubei province in 2022

SUN Chen1,2,3, XU Weili2,4, DU Liangmin1,3, LI Bo2,4, XIAO Ying1,3   

  1. 1. Wuhan Regional Climate Center, Wuhan 430074, China;
    2. Hubei Key Laboratory of Intelligent Yangtze and Hydroelectric Science, Yichang 443000, China;
    3. Three Gorges National Climatological Observatory, Yichang 443002, China;
    4. Three Gorges Cascade Dispatch and Communication Center, Yichang 443000, China
  • Received:2023-09-07 Revised:2023-12-18 Published:2025-06-20

摘要: 选用湖北省逐日站点资料、美国国家环境预报中心NCEP再分析资料和气候指数,对2022年湖北省梅雨期(5月31日至7月8日)及盛夏期(7月9日至8月31日)异常气候特征及其成因进行分析。结果表明:2022年湖北省入梅异常偏早、梅雨期延长,但期间降水量分布不均且强度不稳定,梅雨量偏小,出梅后气温异常偏高,高温过程不仅持续时间长、强度大,且盛夏期的高温过程强度已突破湖北省有气象记录以来的历史极值。东亚副热带西风急流和西太平洋副热带高压(西太副高)提前北跳,结合中高纬环流系统调整,是导致湖北省入梅显著偏早但水汽条件较差的主要原因。在双峰型拉尼娜事件持续发展、印度洋和大西洋赤道暖海温异常等多重外部强迫信号的共同作用下,Hadley环流在东亚副热带地区的下沉运动异常增强,使该地区高压显著偏强。盛夏期间,西太副高西伸加强、南亚高压异常东扩,导致湖北省上空长期受深厚暖高压系统影响,出现持续性极端晴热高温天气。

关键词: 东亚副热带西风急流, 西太平洋副热带高压, 拉尼娜事件, 极端高温

Abstract: Using daily meteorological station data from Hubei province,NCEP reanalysis data,and climate indices,this study analyzes the anomalous climate characteristics and their causes during the Meiyu season (May 31-July 8) and midsummer (July 9-August 31) in Hubei province in 2022.The results show that the onset of the Meiyu season was abnormally early with an extended duration in Hubei province in 2022.However,precipitation was unevenly distributed with unstable intensity and overall deficit in rainfall.After the Meiyu season,temperature was abnormally high,with heatwaves that were exceptionally persistent and intense,breaking historical records in the province's meteorological observation history.The early northward shift of the East Asian subtropical westerly jet and the Western Pacific subtropical high (WPSH),combined with adjustments in mid-latitude and high-latitude circulation systems,were the primary reasons for the significantly early onset of the Meiyu season despite poor moisture conditions in Hubei province.Under the combined influence of multiple external forcing signals,including the continuing development of a double-peak La Niña event and warm sea surface temperature anomalies in the Indian Ocean and equatorial Atlantic,jointly contributed to enhanced subsidence in the East Asian subtropical region via the Hadley circulation,resulting in significantly stronger high pressure in this area.During midsummer,the westward extension and intensification of the WPSH along with the abnormal eastward expansion of the South Asian high,caused Hubei province to remain under the prolonged influence of deep warm high-pressure system,leading to persistent,extreme,hot,and high-temperature weather.

Key words: East Asian subtropical westerly jet, Western Pacific subtropical high, La Niña event, Extreme high temperature

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