Land surface skin temperature is a critical index for global warming. Snow regions at Greenland are extremely sensitive to global climate change and therefore realistically detecting their response to climate change through a model framework is urgent. Nevertheless, model simulation needs first to be examined via the best available satellite and surface measurements. This 1-year study will use MOSID surface measurements to examine NCAR and NASA GMAO's surface temperature simulations over Greenland regions. Furthermore, by analyzing land surface energy budget, we identify the possible physical processes that may be most responsible for the disagreements between model and observations. Finally, we will provide doable approach for improvement on land surface skin temperature simulation.