Trends of Thermal, Wetness, and Vegetative Change in the Circumpolar Arctic

Description

This dataset provides estimates of trends in temperature, moisture, and vegetation changes over the circumpolar Arctic. Time series trends were measured by the Theil-Sen slope and associated p-values for a variety of variables including 2-meter air temperature, precipitation, soil moisture, non-frozen season days, permafrost active layer thickness, snow cover, vapor pressure deficit, land surface water fraction, normalized difference vegetation index (NDVI), and vegetation optical depth. Trends were measured annually and over specific seasons of spring (March to May), summer (June to August), autumn (September to November) and winter (December to February), and for the 1980-2020 and 1997-2020 time periods, depending on the variable and original data availability. Emerging hotspots of change were identified for the same variables and seasons, but only over the 1997-2020 period. In addition, a multivariate ranking was used to create combined hotspot layers to show areas of substantial changes in the thermal environment, moisture, and vegetation; these themes reflect landscape changes considered to be detrimental (e.g., a threat) to ecosystems and human populations. Ancillary files provide the boundaries of study regions, Brown permafrost regions, and a land cover product. The data are provided in cloud optimized GeoTIFF (COG) and shapefile formats.

Resources

Name Format Description Link
21 Search results for publications that cite this dataset by its DOI. https://scholar.google.com/scholar?q=10.3334%2FORNLDAAC%2F2322
21 This link allows direct data access via Earthdata login https://daac.ornl.gov/daacdata/above/CircumArctic_Trends_Hotspots/
21 ORNL DAAC Data Set Documentation https://daac.ornl.gov/ABOVE/guides/CircumArctic_Trends_Hotspots.html
21 Data set Landing Page DOI URL https://doi.org/10.3334/ORNLDAAC/2322
21 Trends of Thermal, Wetness, and Vegetative Change in the Circumpolar Arctic: 1997_2020_1_12_moisture_combined_hotspot_legend.txt https://data.ornldaac.earthdata.nasa.gov/public/above/CircumArctic_Trends_Hotspots/comp/1997_2020_1_12_moisture_combined_hotspot_legend.txt
21 Trends of Thermal, Wetness, and Vegetative Change in the Circumpolar Arctic: 1997_2020_1_12_thermal_combined_hotspot_legend.txt https://data.ornldaac.earthdata.nasa.gov/public/above/CircumArctic_Trends_Hotspots/comp/1997_2020_1_12_thermal_combined_hotspot_legend.txt
21 Trends of Thermal, Wetness, and Vegetative Change in the Circumpolar Arctic: 1997_2020_3_5_moisture_combined_hotspot_legend.txt https://data.ornldaac.earthdata.nasa.gov/public/above/CircumArctic_Trends_Hotspots/comp/1997_2020_3_5_moisture_combined_hotspot_legend.txt
21 Trends of Thermal, Wetness, and Vegetative Change in the Circumpolar Arctic: 1997_2020_3_5_vegetation_combined_hotspot_legend.txt https://data.ornldaac.earthdata.nasa.gov/public/above/CircumArctic_Trends_Hotspots/comp/1997_2020_3_5_vegetation_combined_hotspot_legend.txt
21 Trends of Thermal, Wetness, and Vegetative Change in the Circumpolar Arctic: 1997_2020_9_11_moisture_combined_hotspot_legend.txt https://data.ornldaac.earthdata.nasa.gov/public/above/CircumArctic_Trends_Hotspots/comp/1997_2020_9_11_moisture_combined_hotspot_legend.txt
21 Trends of Thermal, Wetness, and Vegetative Change in the Circumpolar Arctic: 1997_2020_9_11_thermal_combined_hotspot_legend.txt https://data.ornldaac.earthdata.nasa.gov/public/above/CircumArctic_Trends_Hotspots/comp/1997_2020_9_11_thermal_combined_hotspot_legend.txt
33 Trends of Thermal, Wetness, and Vegetative Change in the Circumpolar Arctic: Brown_permafrost_attributes.pdf https://data.ornldaac.earthdata.nasa.gov/public/above/CircumArctic_Trends_Hotspots/comp/Brown_permafrost_attributes.pdf
21 Trends of Thermal, Wetness, and Vegetative Change in the Circumpolar Arctic: 1997_2020_1_12_vegetation_combined_hotspot_legend.txt https://data.ornldaac.earthdata.nasa.gov/public/above/CircumArctic_Trends_Hotspots/comp/1997_2020_1_12_vegetation_combined_hotspot_legend.txt
21 Trends of Thermal, Wetness, and Vegetative Change in the Circumpolar Arctic: land_cover_legend.txt https://data.ornldaac.earthdata.nasa.gov/public/above/CircumArctic_Trends_Hotspots/comp/land_cover_legend.txt
21 Trends of Thermal, Wetness, and Vegetative Change in the Circumpolar Arctic: 1997_2020_6_8_moisture_combined_hotspot_legend.txt https://data.ornldaac.earthdata.nasa.gov/public/above/CircumArctic_Trends_Hotspots/comp/1997_2020_6_8_moisture_combined_hotspot_legend.txt
21 Trends of Thermal, Wetness, and Vegetative Change in the Circumpolar Arctic: 1997_2020_12_2_thermal_combined_hotspot_legend.txt https://data.ornldaac.earthdata.nasa.gov/public/above/CircumArctic_Trends_Hotspots/comp/1997_2020_12_2_thermal_combined_hotspot_legend.txt
21 Trends of Thermal, Wetness, and Vegetative Change in the Circumpolar Arctic: 1997_2020_3_5_thermal_combined_hotspot_legend.txt https://data.ornldaac.earthdata.nasa.gov/public/above/CircumArctic_Trends_Hotspots/comp/1997_2020_3_5_thermal_combined_hotspot_legend.txt
21 ABoVE project site https://above.nasa.gov
21 Trends of Thermal, Wetness, and Vegetative Change in the Circumpolar Arctic: 1997_2020_6_8_vegetation_combined_hotspot_legend.txt https://data.ornldaac.earthdata.nasa.gov/public/above/CircumArctic_Trends_Hotspots/comp/1997_2020_6_8_vegetation_combined_hotspot_legend.txt
21 Trends of Thermal, Wetness, and Vegetative Change in the Circumpolar Arctic: 1997_2020_9_11_vegetation_combined_hotspot_legend.txt https://data.ornldaac.earthdata.nasa.gov/public/above/CircumArctic_Trends_Hotspots/comp/1997_2020_9_11_vegetation_combined_hotspot_legend.txt
33 Trends of Thermal, Wetness, and Vegetative Change in the Circumpolar Arctic: CircumArctic_Trends_Hotspots.pdf https://data.ornldaac.earthdata.nasa.gov/public/above/CircumArctic_Trends_Hotspots/comp/CircumArctic_Trends_Hotspots.pdf
22 Multivariate change hotspot maps for the 1997 to 2020 period, according to select directional changes in thermal, moisture, and vegetation indicators. Thermal indicator includes: average increase in annual air temperature (AT, degrees C); increase in annual non-frozen season (NFS, days); and increase in annual active layer thickness (ALT, m). Moisture indicator includes: decrease in annual precipitation (PPT, mm); increase in annual vapor pressure deficit (VPD, kPa); and a decrease in annual non-frozen season soil moisture (SM, cm3 cm-3). Panels (a) and (b) show identified change based on pixel-level analyses; (d) and (e) show indicator change across individual ecoregions. https://daac.ornl.gov/ABOVE/guides/CircumArctic_Trends_Hotspots_Fig1.jpg

Tags

  • snow-ice
  • climate-indicators
  • land-surface
  • biosphere
  • surface-water
  • atmospheric-water-vapor
  • atmosphere
  • atmospheric-temperature
  • terrestrial-hydrosphere
  • land-surface-agriculture-indicators
  • vegetation
  • atmospheric-ocean-indicators
  • cryospheric-indicators
  • frozen-ground
  • earth-science

Topics

Categories