摘要
本研究利用2018—2024年凉山州下辖气象台发布的暴雨预警信号数据,比较分析了该时间段暴雨预警信号发布的年际及月际特征、空间分布特征等。结果表明,(1)暴雨预警年均发布量呈持续递增趋势,2024年增长迅速,共发布617条,93.8%的预警集中在6—9月;(2)分级预警机制方面,与2018—2023年相比,2024年黄色预警信号的首发占比下降28.8个百分点,更新占比增加31.70个百分点;橙色预警信号的首发增加至65.3%,红色预警信号在2024年首次出现首发;(3)2018—2023年,凉山州暴雨预警信号总发布数量呈分散性分布态势,2024年呈现西南多、东北少的格局。为提升预警发布的时效性和有效性,提出加强对暴雨预警信号标准的学习和科普宣传,构建5G-GIS智能推送系统等建议。
The issuance data of rainstorm warning signals issued by meteorological stations in Liangshan Prefecture from 2018 to 2024 were analyzed in this study to compare interannual and monthly variations,as well as spatial distribution patterns.The findings revealed that(1)An increasing trend was observed in the annual average number of rainstorm warnings issued,with a significant rise recorded in 2024 when 617 warning signals were issued,93.8%of which were concentrated between June and September.(2)Regarding the tiered warning mechanism,the proportion of first-issued yellow warnings was found to have decreased by 28.8 percentage points in 2024 compared to 2018-2023,while the proportion of updated warnings increased by 31.70 percentage points.The proportion of firstissued orange warnings was shown to have risen to 65.3%,and red warnings were documented to have been issued for the first time in 2024.(3)A decentralized distribution pattern was identified in the total number of rainstorm warnings issued across Liangshan Prefecture during 2018-2023,whereas a spatial distribution characterized by higher frequency in the southwest and lower frequency in the northeast was demonstrated in 2024.To improve the timeliness and effectiveness of warning issuance,recommendations were made to enhance public education on rainstorm warning standards and to establish a 5G-GIS intelligent dissemination system.
作者
王川云
WANG Chuanyun(Liangshan Yi Autonomous Prefecture Meteorological Bureau,Xichang 615000,China)
出处
《安徽农学通报》
2025年第13期96-98,共3页
Anhui Agricultural Science Bulletin
基金
凉山彝族自治州气象局科研项目(凉气函[2023]2号)。
关键词
暴雨
预警信号
分级预警
空间分布
heavy rain
warning signal
tiered warning
spatial distribution
