Figure 8. Comparison of the (a) observation (OBS) and (b) modeled (SIM) snow cover extent and (c) their difference (SIM-OBS) for the Northern Hemisphere. The OBS data are from the 1° × 1° Northern Hemisphere EASE-Grid Snow Cover and Sea Ice Extent data set (Brodzik and Armstrong, 2013), which were interpolated into a 2° × 2° grid for comparison.