Changes in albedo of Guizhou Province and its Response to Climate Change
Against the backdrop of global climate change,surface albedo,as one of the critical parameters for sur-face radiation balance and climate research,holds significant importance in studying the response of surface albe-do changes to climatic factors in low-latitude karst regions.This understanding is crucial for comprehending the climatic effects of surface albedo in karst areas and protecting regional ecological environments.Taking Guizhou Province as an example,this study analyzes the spatiotemporal variation characteristics of surface albedo and its time-lagged effects on climatic factors based on MCD43A3 albedo data,MOD15A2H LAI data,temperature,and precipitation data.Methods such as Theil-Sen slope estimation,Mann-Kendall trend test analysis,partial corre-lation analysis,and lagged correlation coefficient analysis were employed.The results indicate that:① From 2001 to 2022,the overall surface albedo in Guizhou Province was relatively low,exhibiting a slow and fluctuating up-ward trend on an inter-annual scale and a pattern of first increasing and then decreasing within the year.The av-erage surface albedo for different seasons followed the order of summer＞autumn＞spring＞winter.Spatially,the inter-annual trend showed an increase in the west and a decrease in the east,while temporally,it increased in spring and summer and decreased in autumn and winter.② The variation of summer surface albedo was associat-ed with both positive and negative correlations with temperature,precipitation,and LAI.Temperature exhibited a larger negative correlation area with surface albedo,while precipitation and LAI showed opposite patterns.The Bijie region in western Guizhou was particularly sensitive to climate change in terms of surface albedo.③ Over 80％of Guizhou Province exhibited time-lagged effects between summer surface albedo and temperature,pre-cipitation,and LAI.
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