2012 Record Challenged as 40% of Greenland Ice Sheet Surface Melts on June 17th

robertscribbler

Yesterday, 40% of the surface of Greenland melted.

It was still mid-June, yet a month before melt values typically peak. But a persistent high pressure system over Greenland, a rapidly melting Baffin Bay and warm winds riding up the west coast were enough to spur a surface melting event that shoved melt coverage firmly above the two standard deviation threshold and into record range.

greenland_melt_area_plot_tmb

(Greenland Melt Extent as of June 17, 2014. Image source: NSIDC.)

Temperatures along the west coast of Greenland and on through the southern ice-covered tip ranged between 30 and 55 degrees Fahrenheit, while 30-43 degree readings surrounded much of the periphery. Warm winds and rain to mixed precipitation accompanied a moisture-laden storm emerging from Baffin Bay and passing over the western ice sheet to add further and extreme early season melt pressure.

The warm storm and rains compounded already rapid melt pond formation along Greenland’s…

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