Global Wetland Methane Emissions from FLUXNET and UpCH4 Model, 2001-2018

Monthly globally gridded freshwater wetland methane emissions from 2001 to 2018, provided in three flux units. The data were derived using a random forest upscaling model trained on 119 site-years of eddy covariance data from 43 wetland sites across multiple classes and climate zones. The National Aeronautics and Space Administration produced this dataset, which adjusts emissions using two global wetland extent maps.

Use Cases

• Modeling global methane budgets based on wetland emissions data.
• Analyzing spatial and temporal trends in wetland methane flux densities.
• Comparing emissions estimates derived from the WAD2M and GIEMS-2 wetland area products.
• Validating climate models with observed methane flux data from diverse wetland classes.

Strengths

• Training data includes 119 site-years of eddy covariance fluxes from 43 sites.
• Covers bog, fen, marsh, swamp, and wet tundra wetland classes across Arctic-boreal, temperate, and (sub)tropical zones.
• Provides emissions estimates adjusted by two distinct global wetland extent datasets.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Excludes open water and coastal wetlands, focusing only on vegetated wetlands.
• Row count is unknown, which may limit suitability assessment.

Provenance

Source

National Aeronautics and Space Administration

Collection Method

Derived from a six-predictor random forest upscaling model (UpCH4) trained on FLUXNET-CH4 Version 1.0 data.

Time Range

2001-2018

Freshness

Last updated 2026-03-13 01:49:36.710234; freshness should be verified.

Geography

Global