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  • Stand Age Projections 2020-2029

    Metadata Updated: November 12, 2020

    These rasters represent output from the Boreal ALFRESCO (Alaska Frame Based Ecosystem Code) model. Boreal ALFRESCO operates on an annual time step, in a landscape composed of 1 x 1 km pixels, a scale appropriate for interfacing with mesoscale climate and carbon models. The last four digits of the file name specifies the year represented by the raster. For example a file named Age_years_historical_1990.tif represents the year 1990. Cell values represent the age of vegetation in years since last fire, with zero (0) indicating burned area in that year. Coverage of this dataset includes much of the state of Alaska (but does exclude Southeastern AK, Kodiak Island, portions of the Alaska Peninsula, and the Aleutian Islands). ALFRESCO simulates the responses of subarctic and boreal vegetation to transient climatic changes. The model assumptions reflect the hypothesis that fire regime and climate are the primary drivers of landscape-level changes in the distribution of vegetation in the circumpolar arctic/boreal zone. Furthermore, it assumes that vegetation composition and continuity serve as a major determinant of large, landscape-level fires. Files from years 1860-2006 use a variety of historical datasets for model spin up and calibration to most closely match historical wildfire dynamics. Files from years 2007-2099 use the Hadley (HAD_CM3) Global Climate model and the A1B emissions scenario for projecting future vegetation ages. The HAD_CM3 model was chosen based on it being the mean predictor of climate.

    Access & Use Information

    License: No license information was provided. If this work was prepared by an officer or employee of the United States government as part of that person's official duties it is considered a U.S. Government Work.

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    Dates

    Metadata Date 2019-09-09T02:58:45-08:00
    Metadata Created Date November 12, 2020
    Metadata Updated Date November 12, 2020
    Reference Date(s) November 2, 2015 (lastUpdate), September 28, 2011 (publication)
    Frequency Of Update null

    Metadata Source

    Harvested from DOI Open Data

    Additional Metadata

    Resource Type Dataset
    Metadata Date 2019-09-09T02:58:45-08:00
    Metadata Created Date November 12, 2020
    Metadata Updated Date November 12, 2020
    Reference Date(s) November 2, 2015 (lastUpdate), September 28, 2011 (publication)
    Responsible Party (Point of Contact); Arctic Landscape Conservation Cooperative (Point of Contact, Publisher)
    Contact Email
    Guid 3613c8ac-76d2-4ac8-9921-73f4295e8dac
    Access Constraints
    Bbox East Long -121.29750762783
    Bbox North Lat 71.437468665965
    Bbox South Lat 51.376135899163
    Bbox West Long -179.99998854085
    Coupled Resource
    Frequency Of Update null
    Licence While every effort has been made to ensure that these data are accurate and reliable within the limits of the current state of the art, the Arctic Landscape Conservation Cooperative cannot assume liability for any damages caused by any errors or omissions in the data, nor as a result of the failure of the data to function on a particular system. The Arctic Landscape Conservation Cooperative makes no warranty, expressed or implied, nor does the fact of distribution constitute such a warranty., null
    Metadata Language
    Metadata Type geospatial
    Progress completed
    Spatial Data Service Type
    Spatial Reference System 3338
    Spatial Harvester True
    Temporal Extent Begin 2011-01-01T00:00:00
    Temporal Extent End 2011-08-18T00:00:00

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