The interaction between Land Surface Temperature (LST) and albedo plays a crucial role in regulating surface energy dynamics and environmental variability. This study presents the first comprehensive, nation-scale diagnostic analysis of the LST-albedo relationship in Iran, using daily MODIS MCD43A4 and MOD11A1 datasets spanning 8035 days from 1 January 2001, to 31 December 2022. Data preprocessing involved standardizing the spatial resolution of 500-m albedo data to match the 1000-m LST data usi