环境变化对淖毛湖气象站气候资料的影响

Effects of Environmental Change on Climate Data of Naomaohu Station

采用差值分析和T检验方法对淖毛湖站和对比站1963—2020年的气候资料进行均一性检验、区域一致性分析,并对淖毛湖站长序列中的环境变化影响进行分析,结果表明:(1)淖毛湖站与对比站的气温均呈上升趋势;两者的降水序列的线性趋势分别为2.92 mm/10 a、3.19 mm/10 a;两者的增湿速率分别为0.17%/10 a、0.46%/10 a;两者的风速随时间变化均为减小趋势。(2)淖毛湖站平均气温、降水量、平均相对湿度和平均风速4个气象要素均存在断点,平均气温、平均相对湿度和平均风速有3个断点,降水量有2个断点。(3)淖毛湖站环境变化对于平均气温变化趋势的影响年、四季均为正贡献;对于平均风速、平均相对湿度变化趋势的影响年、四季均为负贡献;对降水量变化趋势的影响年、春季、秋季为负贡献,夏、冬季为正贡献。

Based on the long time series of climate data at the Naomaohu station and the comparison station during 1963—2020,the methods of difference analysis and T-test were adopted to conduct homogeneity test and regional consistency analysis,while combined with comparison method,the effect of environmental changes on the meteorological data at the Naomaohu station was analyzed.The results showed that:(1)The air temperature at the Naomaohu station and the comparison station showed an upward trend;the precipitation series showed a linear trend of 2.92 mm/10 a and 3.19 mm/10 a,respectively;the humidification rates were 0.17%/10 a and 0.46%/10 a,respectively.Wind speed had a decreasing trend with time.(2)There were breakpoints in average temperature,precipitation,average relative humidity and average wind speed at the Naomaohu station,with three breakpoints in average temperature,relative humidity and average wind speed,and two breakpoints in precipitation.(3)The environmental change at the Naomaohu station had positive contribution to the variation trend of mean air temperature at annual and seasonal scales,and negative contribution to the variation trend of mean wind speed and mean relative humidity at annual and seasonal scales,while to the precipitation trend,had negative contribution at annual,spring and autumn scales,and positive contribution at summer and winter scales.