NDVI Greening and Browning Trends across Alaska and Canada, 1984-2012

Summer NDVI trends and their statistical significance for Alaska and Canada from 1984 to 2012. The dataset was produced by NASA using per-pixel linear regression on peak-summer 30-meter Landsat 5 and 7 surface reflectance data, with quality masks applied to remove clouds and anomalies. It provides annual NDVI change per year and significance levels to indicate greening or browning trends.

Use Cases

• Modeling long-term vegetation greening or browning trends based on per-pixel NDVI time series.
• Assessing climate change impacts on Arctic ecosystems based on statistically significant trend data.
• Validating regional ecological models using 30-meter resolution Landsat-derived NDVI.
• Analyzing spatial patterns of vegetation change across Alaska and Canada from 1984 to 2012.

Strengths

• Covers a 28-year time range (1984-2012) for longitudinal analysis.
• Provides 30-meter spatial resolution from Landsat 5 and 7 sensors.
• Includes statistical significance testing for each pixel's trend via Student's t-test.
• Data is processed with quality masks to exclude clouds and anomalous values.

Limitations

• Row count and dataset size are unknown, which may limit suitability assessment.
• Column-level documentation is absent; field semantics must be inferred after download.
• Data may reflect temporal bias inherent to the 1984-2012 observation period.

Provenance

Source

National Aeronautics and Space Administration

Collection Method

Per-pixel calculation from Landsat 5 and 7 surface reflectance data, with linear regression applied to NDVI time series.

Time Range

1984-2012

Freshness

Last updated 2026-03-12 19:52:22.724859; freshness should be verified.

Geography

Alaska and Canada