| 摘要: |
| 基于2016—2019年防城港市自动气象站小时雨量，结合地形分析短时强降水时空分布特征，结果表明：十万大山南北两侧短时强降水次数从北到南递增，大值区位于十万大山南侧的迎风坡及喇叭口地形；各月的短时强降水的分布有差异，短时强降水主要发生在4—9月，6月短时强降水分布不均匀，7—8月短时强降水最强盛；受对流日变化、低空急流、海陆风等影响，短时强降水日变化特征明显，前汛期市南部短时强降水高峰期出现在清晨、市北部出现在凌晨和午后，后汛期市南部出现在清晨和午后、市北部出现在午后到傍晚，非汛期短时强降水出现的时段呈多峰值态势。 |
| 关键词: 短时强降水；地形；时空分布；逐时降水 |
| DOI： |
| 投稿时间：2020-12-11 |
| 基金项目:中国气象局预报员专项（CMAYBY2020-099）:2019年5月25—28日广西暖区暴雨分析；防城港市气象科研项目（防气科201801号）：防城港市强对流天气雷达特征分析 |
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| Characteristics of Short-term Intense Rain in Fangchenggang City Based on Hourly Rainfall Data |
| HUANG Chunhua,HUANG Ying,LIN Wenhua,MO Quanfang,LIU Jinyu |
| (Fangchenggang Meteorological Bureau, Fangchenggang 538001 , China) |
| Abstract: |
| Based on the hourly rainfall data from automatic weather stations in Fangchenggang from 2016 to2019, the spatial and temporal distribution of short-term intense rain with specific topography is analyzed.The result is shown as follows.The frequency of short-term intense rain increases from north to south across the Shiwandashan; the large-value areas centers in the windward slope on the south side of Shiwandashan and bellmouthed terrain; short-term intense rain mainly occurred from April to September, with an uneven distribution in June and being strongest in July-August; affected by convection diurnal variation, low-level jet stream and sea-land wind, the diurnal variation characteristics are obvious.In general，in the South of Fangchenggang，the peak period of short-term intense rain occurred in the early morning in the first raining season ( April through June)，while occurred in early morning and afternoon in the second raining season (July through September)；in the North of Fangchenggang，the peak period of short-term intense rain occurred in the early morning and afternoon in the first raining season，while the peak period of short-term intense rain occurred from afternoon to evening in the second raining season; in non-flood season，the period of short-term intense rain presents a multi-peak trend. |
| Key words: short-term intense rain； topography； spatiotemporal distribution；hourly rainfall |
