Long-term accuracy assessment of land surface temperatures derived from the Advanced Along-Track Scanning Radiometer

► AATSR LSTs validated with ground LSTs and new radiance-based method in 2002-2008. ► The AATSR operational LST algorithm overestimated ground LSTs by 2 to 5 K. ► Due to errors in classification and fractional vegetation cover at 0.5° × 0.5°. ► Emissivity-dependent LST algorithm shows errors within ± 1.0 K for different surfaces.