Snow-free Freezing Degree-days Annual Standard Deviation (2002-2021)
Description
This is a map of temporal variability in accumulated snow-free freezing potential (freezing degree days, FDD) for the Upper Gunnison domain, derived from daily minimum temperature maps interpolated from weather station and microclimate sensor data combined with Landsat-derived estimates of the timing of seasonal snowpack departure and onset. The original daily maps of air temperature and annual maps of snow dynamics are also available.<br /><br />Snow-free freezing degree-days were accumulated from day-of-year 60 to day-of-year 305 (March 1st to November 1st in a non-leap year). To compute freezing degree days, daily estimates of temperatures below -5 degrees Celsius (considered harmful to most plants) were summed across all days estimated to be free of snow cover and multiplied by negative 1. Because snowpack insulates the ground surface and soil from low temperatures, this estimate can be a more appropriate measure of freezing potential for snow-dominated climates.<br /><br />This map represents the standard deviation of annual values computed from 2002 to 2021.<br /><br /> <br /> In addition to the download links on this page, you can access this dataset and metadata using the <a href="https://github.com/rmbl-sdp/rSDP/">rSDP R Package</a>:<br /> <br /> #devtools::install_github('rmbl-sdp/rSDP')<br /> library(rSDP)<br /> dataset <- sdp_get_raster('R4D036')<br /> metadata <- sdp_get_metadata('R4D036')<br /> <br /> For more information about rSDP, visit the <a href="https://rmbl-sdp.github.io/rSDP/"> package homepage</a>.
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