Tag Archives: Desert

Where Have Our Winters Gone?


NSF – When the winds are right and the desert is dry, dust blows eastward from the semi-arid regions of the U.S. Southwest. In a dust-up, Western style, small dark particles fall on the mountains’ white snowfields, ultimately affecting the entire Colorado River watershed.

While dust has always blown into these mountains, the expansion of grazing and other disturbances in the western U.S. in the mid- to late-1800s led to a five- to seven-fold increase in dust loading. The snow cover became darker and lasted for shorter and shorter periods. more> http://tinyurl.com/bbf9dp9

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