| 1962-2020年南澳县暴雨的气候特征 |
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| 引用本文： | 刘小勇,郭丹妮,林苗青.1962-2020年南澳县暴雨的气候特征[J].广东气象,2022,44(1):34-37. |
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| 作者姓名： | 刘小勇 郭丹妮 林苗青 |
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| 作者单位： | 南澳县气象局,广东南澳 515900,汕头市气象局,广东汕头 515041 |
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| 摘 要： | 基于1962-2020年南澳县气象观测站的逐降水日资料,采用相关分析、线型趋势、多项式拟合、小波分析等方法,分析了南澳县暴雨的气候特征.结果表明:①南澳县暴雨日数与年暴雨降雨量、年降雨量有很好的相关性,年平均暴雨日 数 6.3 d,以0.013 d/年的速率略增加,暴雨日数存在12年的周期变化.②南澳县平均暴雨强度为8...
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| 关 键 词： | 气候学 暴雨日数 南澳县 |
Climatological Characteristics of Hard Rains in Nan'ao County from 1962 to 2020 |
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| LIU Xiao-yong,GUO Dan-ni,LIN Miao-qing.Climatological Characteristics of Hard Rains in Nan'ao County from 1962 to 2020[J].Journal of Guangdong Meteorology,2022,44(1):34-37. |
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| Authors: | LIU Xiao-yong GUO Dan-ni LIN Miao-qing |
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| Institution: | (Meteorological Bureau of Nan’ao,,Nan'ao 515900;Meteorological Bureau of Shantou,Shantou 515041) |
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| Abstract: | Based on the daily rainfall data from a meteorological observation station of Nan’ao from 1962 to 2020 and with the methods of correlation analysis,linear tendency,polynomial fitting and wavelet analysis,this work analyzes the climatological characteristics of hard rains in the county.The results are shown as follows.(1)The number of hard rain days in the county is well correlated with the annual hard rain amount and annual rain amount.The annual average number of hard rain days is 6.3 d,which increases at a rate of 0.013 d/year.The number of hard rain days varies periodically every 12 years.(2)The average intensity of hard rain in Nan’ao is 85.4 mm/d,the average contribution rate by hard rain is 39.5%,and the interannual variation is not significant.(3)86.6%of the hard rain and 94%of persistent hard rain happen in the raining season,with the probability of hard rain in the July-September raining season slightly higher than in the April-June raining season.The monthly variations of the number of hard rain days and number of persistent hard rains are both bimodal.June,July and August are the three summer months in which hard rain and persistent hard rain take place most frequently.(4)The initial day of hard rain mostly occurs in April and May and the last day of hard rain in August and September.The annually initial days(last days)of hard rain tend to appear earlier(later)than usual.The initial and last days of hard rain are somewhat correlated with the number of hard rain. |
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| Keywords: | climatology number of hard rain days Nan’ao County |
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