柴达木盆地南缘浅层地温对气候变化的响应  

Response of Shallow Ground Temperature to Climate Change in Southern Margin of the Chaidamu Basin

作　　者：曾国云 王发科 哈金龙 许学莲 巩俐 ZENG Guoyun;WANG Fake;HA Jinlong;XU Xuelian;GONG Li(Meteorological Bureau of Geermu City in Qinghai Province,Geermu Qinghai 816099)

机构地区：[1]青海省格尔木市气象局,青海格尔木816099

出　　处：《现代农业科技》2020年第22期164-167,共4页Modern Agricultural Science and Technology

摘　　要：利用1961—2019年柴达木盆地南缘气温、降水及浅层地温(0、10、20 cm)的数据,用数理统计方法分析了气温、降水及浅层地温变化特征,并分析了浅层地温对气温、降水变化的响应。结果表明,1961—2019年柴达木盆地南缘年平均气温呈升高趋势,升高倾向率为0.4℃/10 a;年降水量呈增加趋势,增加倾向率为8.0 mm/10 a。0、10、20 cm年平均地温均呈增加趋势,变化趋势大体趋于一致,增加倾向率分别为0.43、0.32、0.33℃/10 a;各浅层地温四季均呈现上升趋势,其中冬季增温趋势较小,春、夏、秋季增温较显著,但是随深度不同增温幅度各有差异;各浅层平均地温每年3月上旬至8月下旬随深度增加而降低,9月中旬至翌年2月下旬平均地温随深度的增加而升高,各层地温月平均最大值均出现在7月,最小值出现在1月。各浅层平均地温与年平均气温、年降水量均成正相关关系,年平均气温升高1℃,0、10、20 cm地温分别增加0.98、0.74、0.75℃;年降水量增加100 mm,0、10、20 cm地温分别增加0.89、0.67、0.77℃,年平均气温对地温的影响较年降水量影响明显。Based on the datas of air temperature,precipitation and shallow ground temperature(0 cm,10 cm,20 cm)in the southern margin of the Caidamu Basin from 1961 to 2019,the variation characteristics of air temperature,precipitation and shallow ground temperature were analyzed by mathematical statistics method.The response of the ground temperature in the shallow layer to the air temperature and precipitation change was analyzed.The results showed that the annual mean temperature in the southern margin of the Caidamu Basin showed an increasing trend with an increasing trend rate of 0.4℃/10 a,and the annual precipitation showed an increasing trend with an increasing trend rate of 8.0 mm/10 a from 1961 to 2019.The annual mean ground temperature of 0 cm,10 cm and 20 cm in the southern margin of the Caidamu Basin had an increasing trend,the trend of variation was generally consistent and increasing trend was 0.43℃/10 a,0.32℃/10 a and 0.33℃/10 a;ground temperature showed a rising trend in four seasons,and the increasing trend in winter was smaller than that in spring,summer and autumn,the extent of warming varied with depth;the mean ground temperature decreased with the increase of depth from early March to late August,and increased with the increase of depth from mid September to late February of the following year.The average maximum value of ground temperature appeared in July and the minimum value appeared in January.The average ground temperature of each shallow layer was positively correlated with the annual average temperature and annual precipitation.The annual average temperature increased by 1℃,and the ground temperature of 0 cm,10 cm and 20 cm increased by 0.98℃,0.74℃and 0.75℃respectively;the annual precipitation increased by 100 mm,and the ground temperature of 0 cm,10 cm and 20 cm increased by 0.89℃,0.67℃and 0.77℃,respectively.The effect of air temperature on soil temperature was more obvious than that of annual precipitation.

关 键 词：浅层地温 气候变化特征 响应 柴达木盆地南缘 

分 类 号：S162[农业科学—农业气象学]