a077b382-c7e5-44a7-8b2a-1cf764c448f6 Scenarios Network for Alaska and Arctic Planning uaf-snap-data-tools@alaska.edu 2023-06-02T12:16:41 ISO 19115:2003/19139 1.0 3 3650 1 2100 1 EPSG:3338 ALFRESCO model outputs - vegetation type 2023-06-24 This dataset consists of spatial representations of vegetation types produced through summarization of ALFRESCO model outputs. These specific outputs are from the Integrated Ecosystem Model (IEM) project, AR5/CMIP5 climate inputs (IEM Generation 2). ALFRESCO outputs were summarized over three future eras (2010-2039, 2040-269, 2070-2099) and a historical era (1950-2008). Both the proportions of all possible vegetation types and the modal vegetation type (most common type over a given era) are available as sub-datasets. Each are summarized over two future emissions scenarios for five CMIP5 models. Alec Bennet Michael Lindgren Tom Kurkowski Craig Stephenson Scenarios Network for Alaska and Arctic Planning uaf-snap-data-tools@alaska.edu vegetation historical projected modeled https://creativecommons.org/licenses/by/4.0/ 1 eng climatologyMeteorologyAtmosphere 1950-01-01 2100-12-31 -197.30 -107.10 50.30 72.90 This dataset consists of two distinct sets of single-band GeoTIFFs: one representing the modal vegetation type for each computed over a given era, and one representing the occurence percentage of a given vegetation type for a given era. The former is provided in the alfresco_vegetation_mode_statistic.zip archive, and the latter is provided in the alfresco_vegetation_type_percentage.zip archive. Both subdatasets are derived from the same set of ALFRESCO model runs driven by each of the following five models: GFDL-CM3, NCAR-CCSM4, MRI-CGCM3, IPSL-CM5A-LR, and GISS-E2-R. The calculation for each pixel is done over all years within the era and among all the simulations (200 replicate runs x number of years per simulation). The file naming convention for the modal dataset looks like this: alfresco_relative_vegetation_change_<start year of summary era>-<end year of summary era>_<model>_<scenario>.tif. The convention is identical for the type percentage version, but with an integer code suffix indicating the vegetation type. The mapping for integer value to vegetation type is as follows: 0: not_modeled, 1: black spruce, 2: white spruce, 3: deciduous forest, 4: shrub tundra, 5: graminoid tundra, 6: wetland tundra, 7: barren lichen moss, 8: temperate rainforest The historical runs of the ALFRESCO outputs, driven by CRU-TS, are also included in this revision. For background on ALFRESCO, please refer to the following reference: Daniel H. Mann, T. Scott Rupp, Mark A. Olson, and Paul A. Duffy. 2012. Is Alaska's Boreal Forest Now Crossing a Major Ecological Threshold? Arctic, Antarctic, and Alpine Research 44 (3), 319-331 GeoTIFF 1.0 http://data.snap.uaf.edu/data/IEM/Outputs/ALF/Gen_1a/alfresco_relative_spatial_outputs/vegetation_type WWW:LINK-1.0-http--link URL to web-accessible folder containing downloads for this data set