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Using the NASA EOSDIS Common Metadata Repository

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  • ABoVE: Ecosystem Map, Great Slave Lake Area, Northwest Territories, Canada, 1997-2011

    https://cmr.earthdata.nasa.gov/search/concepts/C1657940496-ORNL_DAAC.xml
    Description:

    This dataset provides an ecosystem type map at 12.5 meter pixel spacing and 0.2 ha minimum mapping unit for the area surrounding Great Slave Lake, Northwest Territories, Canada for the time period 1997 to 2011. The map includes nine classes for peatland, wetland, and upland areas derived from a Random Forest classification trained on multi-date, multi-sensor remote sensing images across the study extent, and using field data and high-resolution Worldview-2 image interpretation for training and validation. The nine classes are: Water, Marsh, Swamp, Open Fen, Treed Fen, Bog, Upland Deciduous, Upland Conifer, and Sparsely Vegetated. A tenth map class identifies areas of historical fires (prior to 2011) that are currently undergoing post-fire successional revegetation. This dataset provides an ecosystem type map of the area before the large fire season of 2014 to better understand the effects of fires in the area.

    Links: Temporal Extent: Spatial Extent:
    Minimum Bounding Rectangle: 58.51 -123.04 65.15 -109.46

    ORNL_DAAC Short Name: Great_Slave_Lake_Ecosystem_Map_1695 Version ID: 1 Unique ID: C1657940496-ORNL_DAAC

  • ABoVE: Gridded 30-m Aboveground Biomass, Shrub Dominance, North Slope, AK, 2007-2016

    https://cmr.earthdata.nasa.gov/search/concepts/C1456630397-ORNL_DAAC.xml
    Description:

    This dataset includes 30-m gridded estimates of total plant aboveground biomass (AGB), the shrub AGB, and the shrub dominance (shrub/plant AGB) for non-water portions of the Beaufort Coastal Plain and Brooks Foothills ecoregions of the North Slope of Alaska. The estimates were derived by linking biomass harvests from 28 published field site datasets with NDVI from a regional Landsat mosaic derived from Landsat 5 and 7 satellite imagery. The data cover the period 2007-06-01 to 2016-08-31.

    Links: Temporal Extent: Spatial Extent:
    Minimum Bounding Rectangle: 64.73 -168.58 76.23 -111.55

    ORNL_DAAC Short Name: Maps_AGB_North_Slope_AK_1565 Version ID: 1 Unique ID: C1456630397-ORNL_DAAC

  • ABoVE: Landsat-derived Annual Dominant Land Cover Across ABoVE Core Domain, 1984-2014

    https://cmr.earthdata.nasa.gov/search/concepts/C1631206170-ORNL_DAAC.xml
    Description:

    This dataset provides two 30-m resolution time series products of annual land cover classifications over the Arctic Boreal Vulnerability Experiment (ABoVE) core domain for each year of the period 1984-2014. The data are the annual dominant plant functional type in a given 30-m pixel derived from Landsat surface reflectance, landcover training data mapped across the ABoVE domain (using Random Forests modeling, with clustering and interpretation of field photography) and very high resolution imagery to assign land cover classifications. One product has a 15-class land cover classification that breaks out forest and shrub types into several additional classes; the other product provides a simplified, 10-class approach. Classification accuracy assessment results are provided per year. Assessments were based on a probability-based random sample of reference data that supported statistically robust estimation of areas and uncertainties in mapped areas.

    Links: Temporal Extent: Spatial Extent:
    Minimum Bounding Rectangle: 50.26 -170.01 76.23 -98.97

    ORNL_DAAC Short Name: Annual_Landcover_ABoVE_1691 Version ID: 1 Unique ID: C1631206170-ORNL_DAAC

  • ABoVE: Landsat-derived Burn Scar dNBR across Alaska and Canada, 1985-2015

    https://cmr.earthdata.nasa.gov/search/concepts/C1536980561-ORNL_DAAC.xml
    Description:

    This dataset contains differenced Normalized Burned Ratio (dNBR) at 30-m resolution calculated for burn scars from fires that occurred within the Arctic Boreal and Vulnerability Experiment (ABoVE) Project domain in Alaska and Canada during 1985-2015. The fire perimeters were obtained from the Alaskan Interagency Coordination Center (AICC) and the Natural Resources Canada (NRC) fire occurrence datasets. Only burns with an area larger than 200-ha were included. The dNBR for each burn scar at 30-m pixel resolution was derived from pre- and post-burn Landsat 5, 7, and 8 scenes within a 5-km buffered area surrounding each burn scar using Landsat LEDAPS surface reflection image pairs.

    Links: Temporal Extent: Spatial Extent:
    Minimum Bounding Rectangle: 50.25 -168.42 71.36 -101.74

    ORNL_DAAC Short Name: ABoVE_Fire_Severity_dNBR_1564 Version ID: 1 Unique ID: C1536980561-ORNL_DAAC

  • ABoVE: NDVI Trends across Alaska and Canada from Landsat, 1984-2012

    https://cmr.earthdata.nasa.gov/search/concepts/C1548587534-ORNL_DAAC.xml
    Description:

    This dataset provides the summer NDVI trend and trend significance for the period 1984-2012 over Alaska and Canada. The NDVI were calculated per-pixel from all available peak-summer 30-m Landsat 5 and 7 surface reflectance data for the period. NDVI time series were assembled for each 30-m land location (i.e., non-water, non-snow), from observations that were unaffected by clouds as indicated by data-quality masks and following additional processing to remove anomalous NDVI values. A simple linear regression via ordinary least squares was applied to the per-pixel NDVI time series. The slope of the regression was taken as the annual NDVI trend (unit NDVI change per year) and is reported in the "trend" data files. A Student's t-test was used to assess the significance of the trend and the per-pixel significance is reported in the "trend_sig" data files. A significant positive slope indicates a greening trend, and a significant negative slope indicates a browning trend.

    Links: Temporal Extent: Spatial Extent:
    Minimum Bounding Rectangle: 41.61 -169.97 80.51 -50.17

    ORNL_DAAC Short Name: Vegetation_greenness_trend_1576 Version ID: 1 Unique ID: C1548587534-ORNL_DAAC

  • ABoVE: Peak Greenness for Canadian Boreal Forest from Landsat 5 TM Imagery, 1984-2011

    https://cmr.earthdata.nasa.gov/search/concepts/C1519009747-ORNL_DAAC.xml
    Description:

    This dataset provides a 28-year time series of peak greenness (NDVI) data derived from Landsat 5 TM imagery over the boreal forest region of Canada. Landsat 5 TM scenes were collected for 46 selected sidelap sites along gradients in climate, tree cover, and disturbance history from 1984 to 2011. Peak-greenness reflectance was computed for 30-m Landsat pixels using the maximum normalized difference vegetation index (NDVI) along with the normalized burn ratio (NBR) during the period between days of the year (DOY) 180 and 204. To facilitate trend analysis at each site, the NDVI and NBR data of the 30-m Landsat pixels were regridded to the coarser MODIS 500-m (463.3-m) spatial scale to reduce the effects of missing data and to enhance the significance of the trend. The regridded NDVI and NBR 28-year time series data at 500-m resolution are provided for each of the 46 sites. Two trend analyses were run on the 500-m resolution data and are reported for each site. Supplemental site metadata are also provided, including the number of valid Landsat pixels, land cover composition, and disturbance history, for each 500-m pixel.

    Links: Temporal Extent: Spatial Extent:
    Minimum Bounding Rectangle: 45.32 -124.47 63.44 -53.91

    ORNL_DAAC Short Name: Canada_Boreal_Forest_Greenness_1587 Version ID: 1 Unique ID: C1519009747-ORNL_DAAC

  • ABoVE: Riverbank Erosion and Vegetation Changes, Yukon River Basin, Alaska, 1984-2017

    https://cmr.earthdata.nasa.gov/search/concepts/C1581602131-ORNL_DAAC.xml
    Description:

    This dataset provides a time series of riverbank erosion and vegetation colonization along reaches of the Yukon River (3 study areas), Tanana and Nenana Rivers (1 area), and Chandalar River (1 area) in interior Alaska over the period 1984-2017. The change data were derived from selected 30-m images from Landsat TM, Landsat ETM+, and Landsat Operational Land Imager (OLI) surface reflectance products. Image classification used the Normalized Differenced Vegetation Index (NDVI) with an NDVI threshold of 0.2 to differentiate vegetated from non-vegetated pixels. Images were assigned to one of seven or eight multiyear intervals, within the 1984-2017 overall range, for each study area. Time intervals vary by study site. Change detection identified shifts from one time interval to the next: changes from vegetated to non-vegetated classes were considered riverbank erosion and changes from non-vegetated to vegetated classes were considered vegetation colonization.

    Links: Temporal Extent: Spatial Extent:
    Minimum Bounding Rectangle: 61.91 -161.46 68.15 -143.3

    ORNL_DAAC Short Name: Erosion_Vegetation_Yukon_1616 Version ID: 1 Unique ID: C1581602131-ORNL_DAAC

  • ABoVE: Surface Water Extent, Boreal and Tundra Regions, North America, 1991-2011

    https://cmr.earthdata.nasa.gov/search/concepts/C1281783448-ORNL_DAAC.xml
    Description:

    This data set provides the location and extent of surface water (open water not including vegetated wetlands) for the entire Boreal and Tundra regions of North America for three epochs, centered on 1991, 2001, and 2011. Each of the products were generated with at least three years of ice-free Landsat imagery. The data are at 30-m resolution and were derived from time series of Landsat 4 and 5 Thematic Mapper (TM) data and Landsat 7 Enhanced Thematic Mapper (ETM+) covering all of Alaska and all provinces of Canada. The overall goal was to generate a map of the nominal extent of water for a given epoch, where nominal is neither the maximum nor the minimum but rather a representative extent for that time period.

    Links: Temporal Extent: Spatial Extent:
    Minimum Bounding Rectangle: 41.7 -177.48 82.37 -53.94

    ORNL_DAAC Short Name: Decadal_Water_Maps_1324 Version ID: 1.1 Unique ID: C1281783448-ORNL_DAAC

  • Alaska Tidewater Glacier Terminus Positions, Version 1

    https://cmr.earthdata.nasa.gov/search/concepts/C1386250732-NSIDCV0.xml
    Description:

    This data set contains Alaska tidewater glacier terminus positions digitized from USGS topographic maps and Landsat images.

    Links: Temporal Extent: Spatial Extent:
    Minimum Bounding Rectangle: 56.5 -151 61.5 -132

    NSIDCV0 Short Name: NSIDC-0634 Version ID: 1 Unique ID: C1386250732-NSIDCV0

  • Arctic Alaska Vegetation, Geobotanical, Physiographic Maps, 1993-2005

    https://cmr.earthdata.nasa.gov/search/concepts/C1581605354-ORNL_DAAC.xml
    Description:

    This data set provides the spatial distributions of vegetation types, geobotanical characteristics, and physiographic features for the Arctic tundra region of Alaska for the period 1993-2005. Specific attributes include dominant vegetation, bioclimate subzones, floristic subprovinces, landscape types, lake coverage, and substrate chemistry. This data set generally includes areas North and West of the forest boundary and excludes areas that have a boreal flora such as the Aleutian Islands and alpine tundra regions south of treeline.

    Links: Temporal Extent: Spatial Extent:
    Minimum Bounding Rectangle: 57.08 -173.05 71.37 -138.54

    ORNL_DAAC Short Name: Alaska_Arctic_Tundra_Veg_Map_1353 Version ID: 1 Unique ID: C1581605354-ORNL_DAAC