Snow water equivalent data for C1 Snotel, 1981 - ongoing.

The U.S. Soil Conservation Service (SCS) operates hundreds of Snotel sites
throughout the western United States. One of these is on Niwot Ridge at C-1, located
approximately 1.6 km, by road, from the University of Colorado Mountain Research
Station at an approximate elevation of 3000 meters. The Snotel installations operate
on the principle that the snowpack exerts pressure on liquid-filled stainless steel
"pillows" that rest on the ground. Pressure transducers output a digital signal that
is sent via radio telemetry to one of two receiving stations. The transducer output
is calibrated by measuring snowpack depth and density on or about the 25th of each
month from December through April. A Mt. Rose snow sampler was used to determine the
depth and density of the snowpack at each of the "pillow's" four corners. These four
values were averaged to determine the monthly snow water equivalent (SWE) in inches. NOTE: The LTER data portal display does not display important maintenance/log
information or other EML metadata features. Please be sure to view the EML file (a
text file that contains XML tags) which is included in the zip archive (click on
"Download zip archive") pertaining to each dataset. The EML file name will have the
following format: knb-lter-nwt.[3 digit dataset number].[version number].xml. Most
web browsers can parse the EML so it's easier to read.