| 广州短时强降水特征分析 |
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| 引用本文： | 杨慧燕,廖菲,肖柳斯,高美谭.广州短时强降水特征分析[J].广东气象,2021,43(1). |
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| 作者姓名： | 杨慧燕 廖菲 肖柳斯 高美谭 |
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| 作者单位： | 广州市气象台,广东广州511430 |
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| 基金项目： | 广东省自然科学基金项目(2019A1515011813)。 |
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| 摘 要： | 利用广州5个地面观测站2008—2019年逐时降水资料,基于4分位、线性统计等方法,对近10年来广州市短时强降水的变化特征进行分析总结。结果表明:短时强降水的小时雨量和分钟雨量变化均呈双峰型分布;前35 min内分钟雨量对短时强降水小时雨量的贡献量最大,而0~5 mm雨量等级的降雨频率占比最高;各区短时强降水频率具有明显的月变化,5月各区的降雨频率最高,其次是6、8月,最低是10月;短时强降水存在较强的局地性,从各区汛期期间的降雨频率来看,增城区的降雨频率最高,其次是黄埔区,最低是番禺区;前汛期短时强降水的降雨频率高于后汛期,其中前汛期增城区的降雨频率最高,后汛期则是黄埔区降雨频率高于其他区,而番禺区前、后汛期的降雨频率占比差最小。
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| 关 键 词： | 气候学 短时强降水 降雨频率 小时雨量 分钟雨量 广州 |
Analysis of the Characteristics of Short-term Hard Rains in Guangzhou |
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| YANG Hui-yan,LIAO Fei,XIAO Liu-si,GAO Mei-tan.Analysis of the Characteristics of Short-term Hard Rains in Guangzhou[J].Journal of Guangdong Meteorology,2021,43(1). |
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| Authors: | YANG Hui-yan LIAO Fei XIAO Liu-si GAO Mei-tan |
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| Institution: | (Meteorological Observatory of Guangzhou,Guangzhou 511430) |
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| Abstract: | Using daily rainfall data from five surface stations in Guangzhou from 2008 to 2019,this paper analyzes and summarizes the variation characteristics of short-term hard rains(hereafter referred to as"STHR")in the years studied based on the methods of quarter quantiles and linear statistics.The result is shown as follows.The variation of both hourly and minute rain amounts of STHR is bimodal.For a specific process of rain,the minute rain amount for the first 35 min has the maximum contribution to the hourly rain amount of STHR and the 0 to 5 mm rain level takes up the largest share of rain frequency.The frequency of STHR varies significantly on the monthly basis across different districts of the metropolitan.The rain frequency is the highest in May for all districts,followed in turn by June and August,with October having the least.The STHR shows high locality.It is shown from the spatial distribution of frequency for the raining season that the district of Zengcheng has the largest rain frequency,followed by Huangpu,and Panyu has the smallest.The rain frequency of STHR is larger in the April-June raining season than in the July-September season.Zengcheng has the largest rain frequency of STHR for the former raining season while Huangpu has the largest rain frequency for the latter.Panyu is the district that has the least share in rain frequency in both the raining seasons. |
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| Keywords: | climatology short-term hard rain rain frequency hourly rain amount minute rain amount Guangzhou |
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