Global Wetland Trends | Parisa Abbasalizadehrezaei

40 years of surface water, seen from space

Monthly surface-water area was mapped from Landsat imagery for lakes and wetlands worldwide. Each point is one water body, coloured by its long-term trend.

Increasing

No significant trend

Decreasing

Trend (% of mean area per decade)

≤ −20%0≥ +20%

Filter

Increasing No significant trend Decreasing

Fastest shrinking

Fastest growing

Trend: linear regression of monthly water area over the full record, expressed relative to each water body's mean area; classed as significant at p < 0.05. Each wetland's popup shows its annual water area relative to its long-term mean, with the fitted trend. Marker size scales with mean water area. Water-body outlines and names from the Global Lakes and Wetlands Database (GLWD). Preliminary research results.