3d4cc2e2-5cfb-4fed-b397-06854edb747f Scenarios Network for Alaska and Arctic Planning uaf-snap-data-tools@alaska.edu 2023-05-30T16:19:46 ISO 19115:2003/19139 1.0 3 121 1 106 18493 198 18486 EPSG:3338 20 km annual degree day totals at multiple thresholds for Alaska, 1980-2100 2023-05-30 This dataset consists of four different sub-datasets: degree days below 65°F (or "heating degree days"), degree days below 0°F, degree days below 32°F (or "freezing index"), and degree days above 32°F (or "thawing index"). All were derived from the same dataset of outputs from dynamically downscaling one reanalysis (ERA-Interim) and two CMIP5 GCMs (GFDL-CM3, NCAR-CCSM4) over Alaska using the Weather Research and Forecasting model (WRF). Data from the GCMs are driven exclusively by the RCP 8.5 emissions scenario. Heating degree days, degree days below 0°F, and freezing index were computed in the following way: subtract the daily mean temperature values from the threshold value and compute the sum of this time series for the given calendar year. Thawing index is instead computed as the annual sum of the quantities resulting from subtracting the threshold (32°F) from the daily mean temperature values. This dataset was created to support the Arctic EDS, an online web tool resource created to serve engineering-oriented climate projections, inspired by the historical publication titled, "Environmental atlas of Alaska." Charles Parr Kyle Redilla Scenarios Network for Alaska and Arctic Planning uaf-snap-data-tools@alaska.edu https://creativecommons.org/licenses/by/4.0/ 20 eng climatologyMeteorologyAtmosphere 1980-01-01 2100-12-31 -202.40 -117.40 49.20 71.40 Files are named following this template: <degree day type>_<model name>_<summary year>.tif. GeoTIFF 1.0 http://data.snap.uaf.edu/data/Base/AK_WRF/Arctic_EDS_degree_days/ WWW:LINK-1.0-http--link URL to web-accessible folder containing downloads for this data set