Circumpolar Arctic Thermal, Moisture, and Vegetation Trends

1980-2020 and 1997-2020 time periods provide estimates of trends in temperature, moisture, and vegetation changes over the circumpolar Arctic. The data includes Theil-Sen slope and p-value trends for variables like 2-meter air temperature, precipitation, soil moisture, permafrost active layer thickness, snow cover, and NDVI, analyzed annually and seasonally. Combined hotspot layers identify areas of substantial change considered detrimental to ecosystems and human populations.

Use Cases

• Analyzing permafrost active layer thickness trends to assess infrastructure risk.
• Mapping vegetation optical depth and NDVI hotspots to study tundra greening.
• Assessing seasonal snow cover and soil moisture changes for hydrological models.
• Identifying combined thermal environment hotspots for conservation prioritization.
• Studying vapor pressure deficit and land surface water fraction trends for climate impact assessments.

Strengths

• Covers a long temporal span, with some variables analyzed from 1980 to 2020.
• Includes multivariate ranking to create combined hotspot layers for thermal, moisture, and vegetation themes.
• Provides data in cloud-optimized GeoTIFF (COG) and shapefile formats for efficient analysis.

Limitations

• Key metadata like row count, file size, and specific column names are unavailable from all sources.
• Conflicting 'last updated' dates exist between platforms (2026 vs. 2020), casting doubt on data freshness.
• License is ambiguously listed as 'other-license-specified' without further details.

Provenance

Source

National Aeronautics and Space Administration

Collection Method

Trends measured by Theil-Sen slope and p-values from satellite and model-derived data.

Time Range

1980-2020

Freshness

2026-04-09 21:40:43.317105

Geography

Circumpolar Arctic