Analysis of the Diurnal Variation Characteristics of Precipitation in Guangdong
Based on the hourly precipitation data from 86 national meteorological observation stations in Guangdong from 2008 to 2020,this work analyzes the characteristics of diurnal variation of the precipitation in the province.The results are shown as follows.For most of the observation stations in Guangdong,the di-urnal amount,frequency and intensity of precipitation peaked post-midday through late afternoon or early evening while some sites in Shaoguan,Qingyuan and the coast observed their diurnal peaks in early morn-ing.The precipitation amount varied at a slightly larger diurnal amplitude than the precipitation intensity while the diurnal range of precipitation frequency was relatively small.For the precipitation frequency,the diurnal variation was all bimodal across different parts of the province;it was relatively large in early morning in the northwest and southeast,comparable in early morning and post-midday time in the southwest,and rel-atively large post-midday in the central part and northeast.For the precipitation intensity,the diurnal range was all unimodal and peaked post-midday across the province,and the diurnal peak of the precipitation a-mount mainly occurred post-midday.With the change of seasons,the diurnal peaks of precipitation differed in the time of occurrence.It is shown that the diurnal variation of bimodal precipitation mainly resulted from the fact that the diurnal peaks of precipitation varied with seasons.Besides,the diurnal variation of precipi-tation in all parts of the province took place with the change of seasons,either advancing or postponing in the time of appearance.
万方数据
维普
