基于相对湿润度指数的贵州省近十年干旱特征分析

为分析贵州省干旱分布特征,基于贵州省均匀分布的30个气象站点2010~2019年的逐日气象数据,以相对湿润度指数为干旱监测指标,利用反距离权重插值分析及相关分析研究贵州省近10年的干旱特征。结果表明,贵州省不同月份的干旱强度和干旱发生范围有所不同,且总体上呈干旱等级越高,干旱范围越小的态势。不同时间尺度的干旱强度和干旱范围在空间上有所差异,月尺度的干旱强度大于年尺度的干旱强度和季尺度的干旱强度,而季尺度的干旱表现为西高东低,年尺度的干旱表现为北高南低的趋势。按照年尺度和季尺度的平均水平来看,贵州省近十年无干旱发生。研究区干旱的发生受气候因子影响较大,且受降雨影响最大。

Analysis of Drought Characteristics in Guizhou Province in Recent Ten-Years Based on Relative Humidity Index

Based on the daily meteorological data of 30 meteorological stations in Guizhou Province from 2010 to2019,the relative humidity index was used as the drought monitoring index,and the inverse distance weight interpolation analysis and correlation analysis were used to analyze the drought characteristics in Guizhou Province in recent 10 years.The results show that the intensity and scope of drought in different months in Guizhou Province are different,and in general,the higher the drought level,the smaller the drought scope.The drought intensity and drought range in different time scales are different in space.The drought intensity on the monthly scale is greater than that of the annual scale and the seasonal scale,while the drought on the seasonal scale is higher in the west and lower in the east.The drought in the north is high in the north and low in the south.According to the annual and seasonal average levels,there has been no drought in Guizhou Province in the past ten years.The occurrence of drought in the study area is greatly affected by climatic factors,and is most affected by rainfall.