[1]廖胜石,陆甲,刘璐,等.2023年7月广西持续性高温天气成因及前兆信号分析[J].气象研究与应用,2024,45(02):88-94.[doi:10.19849/j.cnki.CN45-1356/P.2024.2.15]
　LIAO Shengshi,LU Jia,LIU Lu,et al.Analysis of causes and precursor signals of persistent heat waves in Guangxi in July 2023[J].Journal of Meteorological Research and Application,2024,45(02):88-94.[doi:10.19849/j.cnki.CN45-1356/P.2024.2.15]
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2023年7月广西持续性高温天气成因及前兆信号分析()
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气象研究与应用[ISSN:1673-8411/CN:45-1356/P]

卷:
第45卷
期数:
2024年02期
页码:
88-94
栏目:
技术总结
出版日期:
2024-06-15

文章信息/Info

Title:
Analysis of causes and precursor signals of persistent heat waves in Guangxi in July 2023
作者:
廖胜石;  陆甲;  刘璐;  李广桃
广西壮族自治区气候中心, 南宁 530022
Author(s):
LIAO Shengshi;  LU Jia;  LIU Lu;  LI Guangtao
Guangxi Climate Center, Nanning 530022, China
关键词:
高温; 副热带高压; 热带西太平洋暖池; 海温
Keywords:
high temperature; subtropical high; tropical western Pacific warm pool; SST
分类号:
P457.3
DOI:
10.19849/j.cnki.CN45-1356/P.2024.2.15
摘要:
利用广西 91个国家气象观测站最高气温逐日资料和 NCEP/NCAＲ再分析资料、NOAA向外长波辐射资料，国家气候中心 130项气候系统监测指数资料，分析 2023年 7月广西持续性高温天气的成因，探寻其前兆信号。结果表明，7月9—16日和22—29日，广西出现2次大范围高温天气过程，全区平均高温日数12 d，为1951年以来同期第3多。两个高温天气过程中，广西受台风西侧外围下沉气流控制，副热带高压强度偏强，位置偏北偏西、南亚高压异常东扩。深厚高压系统控制下的异常下沉增温作用导致广西2023年7月高温天气的发生发展。前期3—4月热带西太平洋暖池海温特征量与当年 7月广西高温日数呈显著正相关，此因子可作为 7月广西高温天气一个可靠的前兆信号。
Abstract:
Based on the daily maximum temperature from 91 weather stations in Guangxi and reanalysis data from NCEP/NCAR，outgoing longwave radiation data from NOAA，and 130 circulation indexes from National Climate Center in China，the causes of high temperature weather process in Guangxi in July 2023 were analyzed，and their precursor signals were explored. The results showed that there were two widespread high-temperature weather processes in Guangxi during 9—16 and 22—29 July，2023 in Guangxi. The average number of high-temperature days in Guangxi was 12，which is the 3rd greatest during the same period since 1951. Guangxi was controlled by the western peripheral sinking air flow of tropical cyclones. During the two processes，the western Pacific subtropical high was strong，with its position expanding north-westerly ， and the South Asian High also has shown an abnormally eastward extension. The effect of anomalous subsidence and warming controlled by the deep high-pressure system leaded to the development of persistent heat waves in Guangxi in July 2023. The warm pool SST index in the tropical western Pacific Ocean in MarchApril is significantly positively correlated with the number of high temperature days in Guangxi in July，which can be used as a reliable preceding signal of persistent heat waves in July in Guangxi.

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备注/Memo

备注/Memo:
收稿日期:2024-3-25。
基金项目:中国气象局复盘总结专项（FPZJ2024-101）和广西气象科研计划项目（桂气科2024M04）
作者简介:廖胜石（1976-），硕士，高级工程师，主要从事气候监测与评价研究。E-mail:lss0218@126.com
更新日期/Last Update: 1900-01-01