| 摘要: |
| 【目的】在全球气候变暖背景下,进一步分析红河州冰雹时空分布特征及冰雹灾害风险区划。【方法】利用2014-2022 年红河州精细到乡镇的冰雹记录,使用 AreGIS 提取分析,密度分析,Pearson 相关分析等方法,统计分析红河州降雹时空变化特征和冰雹孕灾环境特征,并在此基础上进行红河州冰雹灾害风险区划。【结果】(1)2014-2022 年红河州降雹日在 10~30 d之间,多年平均为 18.4 d·a”,最近9a降雹日和乡镇降雹站次均呈上升趋势。降雹出现在 7-8月,3-5月2个时段,分别占全年的45%,31% ;多发于14-18 时(64%)。(2)全州 13 县市多年平均降雹日在 0.6~6.0d之间,有3个高发降雹区,分别位于泸西,弥勒一带,石屏、建水一带,蒙自、屏边一带。(3)降雹多发于1000~2 000 m的山区,丘陵地区(频率 73.4%)、坡度<5°的丘陵,坝子和小盆地(频率62.3%)和阳坡地带(频率57.3%)。(4)红河州冰雹灾害风险等级整体呈西南低,东北高的特点,有2个雹灾高风险区:泸西大部、弥勒北部,石屏北部地区。【结论】红河州多年平均冰雹日为 18.4d''a-,呈增加趋势,多发于7-8月,3-5 月的 14-18 时。红河州冰雹灾害风险等级整体呈现出西南低,东北高的特点。 |
| 关键词: 冰雹灾害；时空分布；孕灾环境；GIS技术 |
| DOI： |
| 投稿时间：2024-01-26修订日期：2024-05-29 |
| 基金项目: |
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| Spatio-temporal Distribution of Hailstorm and the RegionDivision of Hail Disaster Risk in Honghe Prefecture |
| liujia,zhengchunmin,Jiang Xinyun,,Fang Jie |
| (Research Center for Disastrous Weather over Hengduan Mountains & Low- Latitude Plateau;Honghe Prefecture Meteorological Service) |
| Abstract: |
| ;Based on the detailed hail reconls at township sites of Honghe Prefecture from 2014 to 2022. thespatial and temporal varation characteristics of hailstorms in Honghe Prefecture and the environment featuresconducive to hail disaster formation are analyzed by the methods of ArGis technology, hail shooting densityanalysis , Pearson correlation and natural breakpoint method. On this basis, the region division of hail disaster risksin Honghe Prefecture is also conducted. The results show that: ( 1 ) From 2014 to 2022, the annual hail days inHonghe Prefecture vary from 10 to 30 days, with an average of 18.4 days per year. Both the number of hail daysand the frequency of hail events show an increasing trend over the past nine years. Hailstorm tends to occur mainlyfrom July to August and from March to May, accounting for 459 and 31% of the whole year, respectively. From14: 00 to 18: 00 is the period to see most hail events, taking up 64%6. (2) The average annual hail days across the13 counties ( cities) of the prefecture are 0.6 to 6.0 days, with three high-frequency areas located around Luxi.Mile, Shiping-Jianshui, and Mengzi-Pingbian, respectively. ( 3) Hailstorm often occur in mountainous and hilly areas at the elevation from 1 ,000 m to 2,000 m above sea level ( the frequeney being 73.4% ), in the hilly andsmall inter-mountain basins with slope <5°( the frequency being 62.3%6 ), and in the sunny slope areas ( thefrequency being 57.39 ). (4) The overall risk level of hail disaster in Honghe Prefecture is low in the southwesbut high in the northeast. There are two high-risk hail disaster areas: one located in the majority of Luxi Countyand the northem part of Mile County, and the other in the northern part of Shiping County. |
| Key words: hail disaster; spatial and temporal distribution characteristics; disaster-pregnant environment |
