Differential Analysis of the Relationship between Land Surface Temperature and Near-surface Air Temperature in Karst Area and Non-karst Area
The relationship between land surface temperature and near-surface air temperature serves as a critical foundation for understanding the interaction between subsurface and near-surface atmosphere,and is also vital for maintaining efficient energy circulation and enhancing climate environment.The natural characteristics of karst areas substantially differ from those of non-karst areas,resulting in divergent patterns of energy transfer between land and atmosphere in these distinct environments.Based on pairwise nearest-neighbor pixel selection,we acquired land surface temperature and near-surface air temperature data for Ziyun and Wangmu counties in southwest Guizhou from 2000 to 2018.Subsequently,we compared and analyzed the discrepancies between karst and non-karst areas.Our findings indicate that:1)The disparities and fluctuations between land surface temperature and near-surface air temperature are more pronounced in karst area than in non-karst area on an annual average basis,with greater energy transfer stability observed in non-karst area.2)In seasonal scale,the difference between land surface tem-perature and near-surface air temperature is more prominent in karst area than non-karst area during spring,sum-mer,and autumn,albeit not in winter.Additionally,the fluctuation of the difference is greater in winter in karst ar-ea,with greater energy transfer stability in karst area throughout all four seasons.3)As for individual months,the difference between land surface temperature and near-surface air temperature is more evident in the karst area com-pared to the non-karst area in each month,with greater fluctuations observed in April in the karst area.However,excluding March and April,energy transfer between land and atmosphere is more stable in non-karst area through-out the other months.The results can serve as a valuable reference for analyzing surface environmental patterns,studying climate change,and safeguarding the ecological environment.
land surface temperaturenear-surface air temperaturedifferenceskarst areanon-karst area
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