南阳市土壤湿度与气候变化的关系分析

根据1981 2005年的气象观测资料和土壤湿度测定资料,利用统计学方法,分析了南阳市土壤湿度变化规律及与温度、降水的关系,结果表明:土壤湿度无论是年均值或最小值都呈明显下降趋势,年平均相对湿度下降约0.4%;浅层湿度变化幅度小,深层变化幅度大。影响土壤湿度的气象因子中,气温与浅层土壤湿度呈明显的负相关,降水量与深层土壤湿度呈明显正相关;各季土壤湿度与气温和降水量的二元回归方程都通过了F检验,其中春秋冬季通过0.01的显著性检验,夏季通过0.05的显著性检验。

Analysis of the Relation between Soil Moisture and Climate Change in Nanyang

According to meteorological observing data and soil moisture measurement data from 1981 to 2005,the relation between soil moisture,temperature and precipitation is analyzed,using statistical analysis methods.The results show that the annual mean and the minimum values of soil moisture are decreased obviously.Annual mean relative humidity is decreased about 0.4 %.The change range in shallow layers is small,and in deep layers is large.The main meteorological factors that influenced soil moisture are temperature and precipitation.The temperature has a significant negative correlation with soil moisture in shallow layers,and precipitation has a significant positive correlation with soil moisture in deep layers.The binary regression equations of soil moisture,temperature and precipitation in different seasons are through F test.It has through 0.01 significance test in spring,autumn and winter,and through 0.05 significance test in summer.