普洱市相对湿度时空变化特征分析

Analysis on Spatio-temporal Change Characteristics of Relative Humidity in Pu’er City

为揭示普洱市相对湿度的变化趋势,以普洱市6个气象站1961-2015年共55年逐日相对湿度序列为研究对象,采用线性回归分析和Mann-Kendall检验法对普洱市年和四季相对湿度的趋势性和突变性进行分析,结果表明:①普洱市相对湿度年内变化曲线呈现单峰单谷型,相对湿度最小出现在3月,7月达到最大,夏秋季节均在80%以上;②近55年来,普洱市年和四季平均相对湿度均呈现出显著减少趋势,其平均变化速率为-0.81%/10年,从四季来看,冬季相对湿度减小幅度最大,夏季、秋季次之,春季最小;③普洱市各站平均相对湿度在空间上也存在差异,整体呈现自西北到东南逐渐增加的规律。

In order to reveal the change trend of relative humidity in Pu’er City,the daily relative humidity series of six meteorological stations in Pu’er City from 1961 to 2015 was taken as the research object.In addition,the trend and catastrophe of relative humidity in Pu’er City in one year and four seasons were analyzed by linear regression analysis and Mann-Kendall test.The results show that the annual change curve of relative humidity in Pu’er City presents a single peak and single valley type.The minimum relative humidity occurs in March and reaches the maximum in July.The relative humidity is above 80%in summer and autumn.Over the past 55 years,the average relative humidity in Pu’er City has shown a significant decrease trend,with an average change rate of-0.81%/10 years.In terms of the four seasons,the reduction of relative humidity in winter is the largest,followed by summer and autumn,and the smallest in spring.Mean relative humidity of each station in Pu’er City also differs in space,showing an increasing rule from northwest to southeast as a whole.