Cold snap in January 2010, world map. Land surface temperature anomaly global satellite map for the period from 1 to 8 January 2010. The colours indicate temperature change from the average for this time of year during the period 2000 to 2008. Blue indicates a decrease in temperature of 12 degrees Celsius, while red indicates an increase of 12 degrees Celsius. Lighter shades of blue and red indicate less change, with white showing no change. The data for this image are from the Moderate Resolution Imaging Spectroradiometer (MODIS) on NASA?ａ?s Terra satellite.