柴达木盆地东部地区浅层地温变化特征分析

ANALYSIS ON CHARACTERISTICS OF SHALLOW GROUND TEMPERATURE CHANGE IN EASTERN QAIDAM BASIN

为了全面分析近年来柴达木盆地东部地区各浅层地温的变化特征,利用乌兰县气象台1981~2017年0、5、10、15、20cm逐日地温资料,通过一元回归、累计距平、M-K法对其变化规律进行分析。结果表明:柴达木盆地东部地区各浅层地温总体来说均呈现上升的趋势,表现为在春季增温最为强烈,而在冬季增幅最小。在春季和秋季,各浅层地温升高趋势很显著,夏季除了0cm地温外其他层次地温升高趋势也很显著,冬季升高趋势显著。各浅层地温年平均地温是以平均每10年升高0.33~0.63℃的趋势递增,10cm平均地温升幅最明显,各浅层地温呈现年最高地温更高,年最低地温更低的趋势,年平均气温也逐年升高。自20世纪90年代年以来,柴达木盆地东部地区浅层地温呈现增暖的趋势,结合累计距平说明,柴达木盆地东部地区浅层地温在20世纪90年代发生了突变。

in order to comprehensively analyze the variation characteristics of each shallow ground temperature in the eastern part of Qaidam area in recent years,the daily ground temperature data from 0,5,10,15 and 20 cm in Wulan County Meteorological Station from 1981 to 2017 were used to analyze its variation law by the method of univariate regression,M-K method.The results show that the temperature of each shallow ground in the eastern part of Qaidam Basin is increasing in general,which is the strongest in spring and the smallest in winter.During spring and autumn,the increasing trend of each shallow layer of ground temperature is very significant,except for 0 cm of ground temperature in summer,the rising trend of other layers of ground temperature is also very significant,and the increasing trend of winter is significant.The average annual ground temperature of each shallow layer is increasing by 0.33~0.63℃ per 10 years.The average ground temperature of 10 cm is the most obvious.Since 1990 s,the shallow ground temperature in the eastern part of Qaidam Basin has been warming up.Combined with the accumulative distance,it shows that the shallow ground temperature in the eastern part of Qaidam Basin changed in 1990 s.