摘要: |
利用柳州市2010-2019年75个加密自动气象观测站小时降水资料,分析柳州市1h、3h、6h短时强降水时空分布特征。结果表明:短时强降水出现最多的是融安、融水一带以及鹿寨北部,山脉的迎风坡和喇叭口地形更利于短时强降水的出现;高发期在5、6月份,其次是7、8月份;短时强降水的日变化呈现单峰结构,主要出现在夜间和早晨时段。该区域短时强降水时空分布特征差异显著,与影响系统、地形的辐合抬升作用以及局地热力条件差异有关。 |
关键词: 加密自动气象观测站;频次;短时强降水;地形 |
DOI: |
投稿时间:2021-09-04修订日期:2021-11-16 |
基金项目:柳州市重点研发计划项目(2019BK10602)“基于城区或县域的区域气候可行性论证研究---以柳州市北部生态新区为例” |
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The Analysis of Short-time Heavy Rainfall Spatio-Temporal Characteristics in Liuzhou Based on the Dense Automatic Weather Stations |
qinjing |
(Liuzhou Meteorological Bureau) |
Abstract: |
Based on the hourly precipitation data of 75 dense observations from automatic weather stations in Liuzhou from 2010 to 2019, the spatio-temporal characteristics of short-time heavy rainfall are investigated. The results indicate that, short-time heavy rainfall happens most frequently in Rongan and Rongshui and northern Luzhai. The windward slopes of the mountains and the trumpet-shaped topography are more conducive to the appearance of short-time heavy rainfall. Short-time heavy rainfall activity reaches high occurrence in May and June, followed by July and August. The diurnal variation of short-time heavy rainfall shows a single-peak distribution, which mainly appears at night and the morning.There are significant differences in the spatio-temporal distribution characteristics of short-time heavy rainfall in this area, which are related to the influence of the system, the convergence and uplift of the topography, and the differences in local thermal conditions. |
Key words: Dense automatic weather station;Frequency;Short-time heavy rainfall;Topography |