A strong, late-season melt pulse continued over the Greenland ice sheet this weekend as melt covered a much greater portion of the ice sheet than is typical for this time of year. As of late July, the area of the Greenland ice sheet subject to melt had spiked to nearly 45%. Soon after, a second melt spike to around 38% followed. Over the past two weeks, melt area coverage has fluctuated between 5 and 25 percentage points above the seasonal average for this time of year, maintaining at or above the typical melt season maximum of around 25% for almost all of this time. http://robertscribbler.wordpress.com/2013/08/05/extensive-dark-snow-very-large-melt-lakes-visible-over-west-slope-of-greenland-as-late-season-melt-pulse-continues/

• Sat Image source: NSIDC http://nsidc.org/greenland-today/
• Methane visualization 4th August 2013 MODIS Terra & Aqua (MODIS Combined Value-Added) Aerosol Optical Depth via http://www.methanetracker.org/
• Further reading http://www.meltfactor.org/blog/