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Colorado: Dust layers a factor in record-early snow melt

Report links wind-blown dust with early runoff

Dust from the desert Southwest is visible on the snow at Loveland Pass, Colorado in this file image from 2010.

NASA Satellite images can trace the dust plumes back to their source.

By Summit Voice

SUMMIT COUNTY — Along with above-average temperatures and dry and sunny weather, spring dust storms in March and April likely were a significant factor in this year’s record early snow-melt season, according to the Silverton-based Colorado Center for Snow and Avalanche Studies.

Snow that’s darkened by wind-deposited dust absorbs much more heat and hastens the warming of the snowpack to an isothermal state (32 degrees from top to bottom).

In its year-end report, the center explains that the dust layers continue to absorb and add solar energy to the snowpack long after the original dust layer is deposited.  Continue reading

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