Analysis of ground temperature change characteristics and its response to temperature in southern Shandong Province from 1981 to 2021
Based on the 0～320 cm layer ground temperature and air temperature data from 26 national meteorological stations in southern Shandong province,the annual and seasonal variation characteristics of the 0～320 cmlayer ground temperature from 1981 to 2021 were analyzed as well as its reponse to temperature.Through linear tendency rate analysis method,Mann-Kendall test,Morlet wavelet analysis method,and ArcGIS spatial analysis function,the distribution characteristics of ground temperature in southern Shandong were explored.It is concluded that the average ground temperature of each layer in the southern Shandong province shows an upward trend,and the temperature rise is most obvious in spring.The ground temperature in 40 cm and 80 cm layers showed a sudden increase in 2015 and 2013,respectively.The ground temperature of each layer has obvious periodic changes on a time scale of 20～25 years,and the ground temperature of each layer has its own second and third periodic changes in different time periods.From the perspective of geography,the ground temperature in southern Shandong shows a distribution pattern of high in the south and low in the north,gradually decreasing from Xuecheng,Weishan towards to the northeast and northwest.There is a significant positive correlation between shallow ground temperature and average temperature in each season,and the correlation coefficients above 0.84.The correlation coefficients between auturm ground temperature and average temperature in 80 cm and 320 cm layers did not pass the 0.05 significance test.
southern Shandong Provinceground temperature change characteristicsMann-Kendall testwavelet analysisArcGIS
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