气象研究与应用2024，Vol.45Issue(2)：88-94,7.DOI:10.19849/j.cnki.CN45-1356/P.2024.2.15
2023年7月广西持续性高温天气成因及前兆信号分析
Analysis of causes and precursor signals of persistent heat waves in Guangxi in July 2023
摘要
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 March-April 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.关键词
高温/副热带高压/热带西太平洋暖池/海温Key words
high temperature/subtropical high/tropical western Pacific warm pool/SST分类
天文与地球科学引用本文复制引用
廖胜石,陆甲,刘璐,李广桃..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(2):88-94,7.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) （FPZJ2024-101）
