[1]卢伟萍,王建东,孙靖雯.基于自动气象观测站的广西短时强降水时空分布特征[J].气象研究与应用,2022,43(04):91-97.[doi:10.19849/j.cnki.CN45-1356/P.2022.4.15]
　Lu Weiping,Wang Jiandong,Sun Jingwen.Spatio-temporal distribution characteristics of short-time heavy precipitation in Guangxi based on automatic meteorological observation stations[J].Journal of Meteorological Research and Application,2022,43(04):91-97.[doi:10.19849/j.cnki.CN45-1356/P.2022.4.15]
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基于自动气象观测站的广西短时强降水时空分布特征()
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气象研究与应用[ISSN:1673-8411/CN:45-1356/P]

卷:
第43卷
期数:
2022年04期
页码:
91-97
栏目:
研究论文
出版日期:
2022-12-15

文章信息/Info

Title:
Spatio-temporal distribution characteristics of short-time heavy precipitation in Guangxi based on automatic meteorological observation stations
作者:
卢伟萍1;  王建东2;  孙靖雯3
1. 广西壮族自治区气象科学研究所, 南宁 530022;
2. 来宾市气象局, 来宾 546100;
3. 梧州市气象局, 梧州 543000
Author(s):
Lu Weiping1;  Wang Jiandong2;  Sun Jingwen3
1. Guangxi Institute of Meteorological Sciences, Nanning 530022, China;
2. Laibin Meteorological Bureau, Guangxi Laibin 546100, China;
3. Wuzhou Meteorological Bureau, Guangxi Wuzhou 543000, China
关键词:
短时强降水; 时空分布; 变异系数
Keywords:
Short-time heavy precipitation; spatial and temporal distribution; coefficient of variation
分类号:
P426
DOI:
10.19849/j.cnki.CN45-1356/P.2022.4.15
摘要:
2014-2021年广西自动气象观测站逐小时降水资料,统计分析广西短时强降水的时空分布特征。结果表明:(1)广西短时强降水事件年频数主要为5-15次,年均频数最大出现在防城区达30.25次·a-1。全区13.54%的测站每年至少出现一次降水量 ≥ 50mm·h-1。(2)广西短时强降水发生范围广,极值区集中。高频高值中心位于沿海,次高频高值中心位于桂东北,桂中和桂西大部地区为相对低频区。高频高值站点基本分布在大型山体迎风坡、山区及河谷地带。(3)广西短时强降水发生频次整体呈年际上升趋势,各月均有出现,1月和12月最少,4-9月是集中爆发期占全年92.1%。不同区域短时强降水月际分布差异明显,沿海和桂东北峰值分别出现在8月和5-6月,桂西北和桂中大部呈双峰结构,主峰均在5-6月,次峰均在8月。(4)03-07时和16-18时是短时强降水的高发时段,午间(11-13时)最少,但不同区域短时强降水的日分布差异明显。
Abstract:
Based on the hourly precipitation data of automatic meteorological observation stations in Guangxi, the spatial and temporal distribution characteristics of short-time heavy precipitation in Guangxi are statistically analyzed. The results show that:(1)The annual frequency of short-time heavy precipitation events in Guangxi is mainly 5~15 times, with the maximum annual average frequency occurring in Fangcheng District, Fangchenggang City, reaching 30.25 times. 13.54% of stations in Guangxi encounter rainstorm events exceeding 50mm·h-1 at least once a year. (2)The occurrence of short-term heavy precipitation in Guangxi is widespread and the extreme-value areas are concentrated. The high-frequency and high-value center is located on the coast, and the secondary high-frequency and high-value center is located in the northeast of Guangxi, and most areas of central and western Guangxi are relatively low-frequency areas. The stations with high-frequency and high-value short-time heavy precipitation are basically distributed on the windward slopes of large mountains, mountainous areas, and river valleys.(3)The overall frequency of short-term heavy precipitation in Guangxi shows an inter-annual upward trend, occurring in all months, with January and December being the least, and April-September being the concentrated outbreak period accounting for 92.1% of the year. The inter-month distribution of the frequency of short-term heavy precipitation in Guangxi is of a single-peak type, with the peak in May-June, and it varies significantly from region to region, with peaks in August and May-June in coastal and northeastern Guangxi respectively, and a double-peaked structure in northwestern and central Guangxi, with the main peak in May-June and the secondary peak in August. (4)03-07 hours and 16-18 hours are the high incidence periods for short-duration heavy precipitation, with the least during midday(11-13 hours), but the intra-day distribution of short-duration heavy precipitation varies significantly from region to region.

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备注/Memo

备注/Memo:
收稿日期:2022-03-16。
基金项目:广西重点研发项目(桂科AB21196041)、广西人工智能预报技术创新团队项目
作者简介:卢伟萍(1978-),女,高级工程师,主要从事天气预报、应用气象与服务研究。E-mail:530731901@163.com
通讯作者:孙靖雯(1994-),女,工程师,主要从事天气预报服务工作。E-mail:957788645@qq.com
更新日期/Last Update: 1900-01-01