| 贵州西南部近5a突发性暴雨时空特征分析 |
| |
| 作者姓名： | 吕阳昆 李阳 杜小玲 |
| |
| 作者单位： | 贵州省黔西南布依族苗族自治州气象局,贵州 兴义 562400,贵州省气象台,贵州 贵阳 550002 |
| |
| 基金项目： | 中国气象局暴雨创新团队(CMACXTD002-3)。 |
| |
| 摘 要： | 利用2014-2018年5-10月贵州西南部的黔西南州、六盘水市、安顺市以及黔南州长顺县、惠水县、罗甸县共20个气象观测站小时降水资料,分析近5 a 5-10月贵州省西南部突发性暴雨的时空变化,结果表明:突发性暴雨呈逐年减少的趋势;月际变化特征为6月"爆发",7月"回落",而8月略增,9-10月呈不断减少趋势;具有白天少、夜间多的日变化特征,且突发性暴雨的高发时段主要是在午后至凌晨。从各等级小时降水骤增量的站次空间分布情况来看,突发性暴雨空间分布与地形分布具有较好的对应关系,骤增等级大时,主要出现在北盘江河谷一带,而镇宁一直是一个高发中心。从突发性暴雨站次的整个时空演变来看,5月从东南部开始,6月兴义和六枝成为南北两个高发中心,7月总体减少,中部为多发中心,8月略有增加,分布呈现出南北盘江河谷一带多发;从逐年的演变来看,"突发性"的特点在地域分布上也有体现,每一年的分布情况均不相同。
|
| 关 键 词： | 贵州西南部 突发性暴雨 时空特征 |
| 收稿时间： | 2020/12/25 0:00:00 |
Analysis of Temporal and Spatial Characteristics of Sudden Rainstorms in Southwest Guizhou in the Past 5 Years |
| |
| Authors: | LYU Yangkun LI Yang DU Xiaoling |
| |
| Institution: | (Qianxinan Prefecture Meteorological Bureau of Guizhou Province,Xingyi 562400,China;Guizhou Province Meteorological Office,Guiyang 550002,China) |
| |
| Abstract: | The temporal and spatial variation of the sudden rainstorms in southwest Guizhou between May and October in the past five years(from 2014 to 2018) is analyzed by using the hourly precipitation data of 20 national meteorological observing stations in southwest Guizhou, including Qianxinan prefecture, Liupanshui city, Anshun city and Changshun county, Huishui county, Luodian county. The results show that the occurrence of sudden rainstorms decreases year by year;the monthly variation is characterized by "outbreak" in June, "falling back" in July, slight increase in August and continuous decrease in September and October;the diurnal variation is characterized by less in daytime while more at nighttime, and the high occurrence period is mainly from afternoon to early morning. From the perspective of the spatial distribution of sudden rainstorms at each level of the sudden increment of hourly precipitation, the occurrence is closely related to the landscapes: when the sudden increment is large, it mainly occurs in the North Panjiang River valley, and Zhenning has always been the center of high occurrence. From the perspective of the temporal and spatial variation of sudden rainstorms, the occurrence starts from the southeast in May, Xingyi and Liuzhi are two high occurrence centers in the south and north respectively in June;it decreases on the whole and the central part of southwest Guizhou is the high occurrence center in July, slight increase and frequent occurrence in the valley of the South Panjiang River and the North Panjiang River in August. From the perspective of interannual variation, the distribution of the occurrence is different every year, and accordingly the "suddenness" is also reflected in the geographical distribution. |
| |
| Keywords: | Southwest Guizhou sudden rainstorms temporal and spatial characteristics |
| 本文献已被 维普 万方数据 等数据库收录！ |
| 点击此处可从《》浏览原始摘要信息 |
| 点击此处可从《》下载免费的PDF全文 |
|
