Analysis of spatial-temporal variation and driving factors of surface temperature in the Huai River Basin
Addressing the issue of lack of research on the spatiotemporal variation of surface temperature based on river basins,this paper was conducted based on MOD11A2 data,and the spatiotemporal variations in surface temperature on an annual and seasonal basis from 2001 to 2020 in the Huai River Basin were analyzed using simple linear regression and significance testing.The correlations between surface temperature and climatic factors as well as human activities,along with their respective contributions,were investigated through correlation and residual analysis.It was revealed that the average annual surface temperature was 15.88 ℃,with over 90％of the area experiencing a warming trend.The coefficients of determination(R2)for air temperature,NDVI,and precipitation in relation to surface temperature from 2001 to 2020 were 0.851,0.544,and 0.416,individually,while the R2 for cultivated land area and built-up land area were 0.45 2 and 0.317,respectively.Residual analysis showed that climatic factors and human activities contributed 53.2％and 46.8％,individually,to the overall change in surface temperature in the Huai River Basin.The experiments indicated an upward trend in surface temperature with significant seasonal variations;climatic factors were found to have a momentous impact and were the dominant factors in the variation of surface temperature across most cities in the basin.The results can provide references for coordinating environmental protection and urban development.
land surface temperatureclimate changeland useHuai River Basin
NETL
NSTL
万方数据
