This video demonstrates the snow melt timing algorithm that I developed to identify the day of year that snow leaves the landscape according to the MOD10A2 Snow Cover Data Product. We begin January 1 2004 and watch for two years as the snow comes and goes in the mountains. Beginning January 1 2006 we see the color scale come in and each time that snow leaves an area the snow melt timing (Day of Year) of those pixels is identified by color.
Using this technique I created continental snow melt timing maps for the period of record (2001-2014) as to calculate mean and standard deviation of snow melt date for the continent. Using these statistics we can then identify the snow melt timing anomaly (per pixel!) for each year on record.