东营站季节性冻土变化特征及其与气温和地温关系

Variation characteristics of seasonal frozen soil at Dongying station and relationships with air temperature and ground temperature

基于东营国家一般站(位于山东省东北部,黄河入海口的三角洲地带,以下简称东营站)自1994年建站以来至2016年3月的冻土与气温和地温资料,利用气候倾向率和相关系数进行趋势和特征分析,并讨论冻土与气温和地温的相关关系。结果表明,东营站冻土存在显著的季节性特征,近22年来最大冻土深度和冻土周期呈递减趋势,最低地温呈明显上升趋势,平均地温和平均气温也都呈波动递增趋势,且与最大冻土具有显著相关性,这说明冻土深度随着温度的升高而减少。

Based on the data of frozen soil,air temperature and ground temperature since Dongying Station was established in March2016,this paper uses accumulated variance and correlation coefficient methods to compare their trend and characteristics,and discusses the relationship between frozen soil,air temperature and ground temperature. The results are as follows: the frozen soil in Dongying Station has obviously seasonal characteristics,In the recent 22 years,both the period and the maximum depth of frozen soil decreased steadily. The tendency of the minimum average ground temperature increased obviously,and the average air temperature and the average ground temperature increased undulately and have significant correlation with maximum of frozen soil,which shows that the depth of frozen soil decreased with the increase of temperature.