Snow below freezing level: Map of snow at risk of melting, where freezing levels were above the elevation and snowpack was exposed to warm air. Composite of University of Arizona snow water equivalent product (Broxton et al., 2019; Zeng et al., 2018), GFS deterministic freezing level product (NCEP/NWS/NOAA/USDC, 2015), and GTOPO30 Digital Elevation model (USGS, 1996). Melt factor: Map of melt factor xxx. Currently calculated for Yuba-Feather watersheds. West-WRF Freezing Level: Map of ensemble forecast product of freezing level by West-WRF, a model in development by CW3E (wrf-model.org). Currently calculated for Yuba-Feather watersheds. Original SWE by Uni. Arizona: Map of snowpacks (snow water equivalent) over CONUS developed at University of Arizona. The data assimilates in-situ SWE measurement with modeled, gridded temperature and precipitation from PRISM (Broxton et al., 2019; Zeng et al., 2018). References: Broxton, P., X. Zeng, and N. Dawson. 2019. Daily 4 km Gridded SWE and Snow Depth from Assimilated In-Situ and Modeled Data over the Conterminous US, Version 1. [Indicate subset used]. Boulder, Colorado USA. NASA National Snow and Ice Data Center Distributed Active Archive Center. doi: https://doi.org/10.5067/0GGPB220EX6A National Centers for Environmental Prediction/National Weather Service/NOAA/U.S. Department of Commerce. (2015). NCEP GFS 0.25 degree global forecast grids historical archive [Data set]. UCAR/NCAR - Research Data Archive. https://doi.org/10.5065/D65D8PWK U.S. Geological Survey. (1996). GTOPO30. [Data set]. http://edc.usgs.gov/products/elevation/gtopo30/gtopo30.html Zeng, X., P. Broxton, and N. Dawson. 2018. Snowpack Change From 1982 to 2016 Over Conterminous United States, Geophysical Research Letters. 45. 12940-12947. https://doi.org/10.1029/2018GL079621 |