ZENG Jiuyang,MA Zhenfeng,PANG Yishu,et al.Characteristics of Extreme High-Temperature Weather in the Sichuan-Chongqing Region in Summer 2022[J].Journal of Chengdu University of Information Technology,2025,40(03):359-367.[doi:10.16836/j.cnki.jcuit.2025.03.017]
2022年夏季川渝地区极端高温天气的特征分析
- Title:
- Characteristics of Extreme High-Temperature Weather in the Sichuan-Chongqing Region in Summer 2022
- 文章编号:
- 2096-1618(2025)03-0359-09
- Keywords:
- summer in 2022; Sichuan-Chongqing region; extremely heat; regional weather process; feature analysis
- 分类号:
- P423.3+6
- 文献标志码:
- A
- 摘要:
- 2022年夏季,川渝地区发生了历史上罕见的极端高温天气事件,为揭示这次极端高温事件的时空演变特征与主要影响因素,基于1991-2022年川渝地区177个国家气象站的逐日资料和NCEP/NCAR的环流场再分析资料,分析了2022年夏季川渝地区极端高温天气和大气环流异常的特征。结果表明:(1)2022 年夏季川渝地区的极端高温天气持续时间、影响范围与高温强度均为1991年以来第一位。整个天气过程大致可分为两个高温时段,第二阶段(7月24日-8月29日)出现高温天气的站次较第一阶段(7月4-17日)增加2.5倍,极端高温天气站次增加12倍。(2)2022年夏季川渝地区发生的区域性高温过程具有发生范围广、持续时间长、极端性强的特点。1991年以来,川渝地区发生10次区域性高温过程有8次出现在21世纪,其中有6次发生在2010年以后,说明在全球气候变暖的背景下,区域性高温事件具有显著增多增强的特点。(3)通过对2022年夏季大气环流场的分析发现,西太平洋副热带高压的异常强大是直接原因,南亚高压异常偏东偏北、西风急流呈平直状态且异常偏北与中高纬度的“两脊一槽”形势导致冷空气不易南下并有利于副高的维持与发展,使该地区长期受稳定下沉气流控制,从而形成极端的高温天气。
- Abstract:
- In the summer of 2022, a rare extreme high-temperature weather event occurred in the Sichuan-Chongqing area. To reveal the spatiotemporal evolution characteristics and main influencing factors of this extremely high-temperature event, this paper is based on daily data from 177 national weather stations and NCEP/NCAR circulation field reanalysis data from 1991 to 2022 in the Sichuan-Chongqing area. The characteristics of extremely hot weather and abnormal atmospheric circulation in the summer of 2022 in the Sichuan and Chongqing are analyzed. The results show that the duration, influence range and high-temperature intensity of the hot weather in the summer of 2022 are the first in history since 1991. The regional high temperature process occurring in the summer of 2022 in the Sichuan and Chongqing region has the characteristics of a wide occurrence range, long duration and strong extreme. The regional high-temperature process appearing from August 3 to August 28 lasted for 26 days, and the comprehensive intensity was the strongest since 1991. Since 1991, 8 of the 10 regional high-temperature processes occurred in the Sichuan-Chongqing area in the 21st century, and 6 of them occurred after 2010, indicating that regional high-temperature events have significantly increased and intensified under the background of global warming. The analysis shows that the high-temperature event is closely related to the abnormal atmospheric circulation, and the anomalies of the South Asian high and subtropical high, the middle and high latitude circulation, the westerlies circulation, and the vertical circulation together lead to the occurrence and development of the extremely high-temperature event.
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备注/Memo
收稿日期:2023-11-02
基金项目:中国气象局气候预测研究重点开放实验资助项目(CMA-LCPS-23-02)
通信作者:马振峰.E-mail:mzf616@aliyun.com