Locals learn snow science during Marble class — The Aspen Times #snowpack #runoff

Map of the Roaring Fork River drainage basin in western Colorado, USA. Made using USGS data. By Shannon1 – Own work, CC BY-SA 4.0, https://commons.wikimedia.org/w/index.php?curid=69290878

From The Aspen Times (Maddie Vincent):

On Sunday, a group of roughly a dozen locals took part in this snow science method as well, collecting core samples and learning about how snowpack contributes to watersheds during a “field trip for adults” in the Marble area.

Led annually by the Roaring Fork Conservancy and United States Department of Agriculture Natural Resources Conservation Service officials for the past six years, the daylong, hands-on snow science education course has aimed to help locals see snow as integral to our ecosystems year-round, not just as a recreational benefit in the winter, according to Megan Dean, director of education for Roaring Fork Conservancy…

…[Megan] Dean said the Roaring Fork watershed contributes about 11% of the water that goes into the Colorado water basin, mostly because the valley’s mountains capture and hold a great deal of water via snow…

After Dean touched on geographic climate trends and key snow science definitions — like the snow water equivalent, which is the actual amount of water in a given volume of snow — soil conservationist Derrick Wyle jumped in to talk snowpack data.

According to Wyle, who works with the USDA’s Natural Resources Conservation Service, snowpack, precipitation, temperature and other climatic conditions are collected consistently throughout the winter season at NRCS SNOTEL sites…

So far this year, Wyle said historic and current data for the Colorado water basin show snowpack is about average for this time of year, with a “coin flip chance” of being above or below average for the whole season…

Karl Wetlaufer (NRCS), explaining the use of a Federal Snow Sampler, SnowEx, February 17, 2017.

During the second half of the Sunday field trip on McClure Pass, Wyle and Dean showed the group both how to look at snow depth, density and the snow water equivalent manually using a [Federal Snow Sampler] and by digging a snow pit, and how the McClure Pass SNOTEL station works to collect the same data on its own.

From small measurements to big picture graphs and newer technology to traditional scientific methods, Wyle and Dean aimed to give the group a snow science crash course and to help put the snowpack numbers they may hear in passing or see online into perspective.

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