Boreal-Arctic Wetland Methane Emissions Estimates 2002-2021

NASA provides upscaled weekly estimates of methane emissions from Boreal-Arctic wetlands from 2002 to 2021 at 0.5-degree spatial resolution. A causality-guided machine learning model, trained and validated on 307 site-years of ground truth data from eddy covariance towers and chambers, generated these emissions data. The dataset is available in netCDF format.

Use Cases

• Validating and improving global methane budget models using spatially and temporally explicit emission estimates.
• Analyzing seasonal and interannual variability in wetland methane fluxes across the northern high latitudes.
• Correlating estimated emissions with environmental drivers like temperature and precipitation within the provided grid cells.
• Assessing the contribution of boreal and arctic wetlands to atmospheric methane concentrations over a 20-year period.

Strengths

• Model training and validation utilized a substantial ground truth dataset of 307 combined site-years from eddy covariance towers and chambers.
• Provides a 20-year continuous weekly time series (2002-2021) for analyzing long-term trends and seasonality.
• Cross-platform presence on Data.gov and NASA EarthData indicates recognized importance and curation.

Limitations

• Specific column names and the exact row/record count are not provided in the available metadata.
• There is a conflict in the 'last updated' date: Data.gov lists 2026-03 13, while NASA EarthData lists 2021-12-30.
• The license is specified as 'other-license-specified' on Data.gov but is 'None' on NASA EarthData, requiring further verification.

Provenance

Source

National Aeronautics and Space Administration (NASA)

Collection Method

Estimates generated by a causality-guided machine learning model upscaled from ground-based flux measurements.

Time Range

2002 to 2021

Freshness

2026-03-13 12:56:42.640048

Geography

Global grid cells containing wetlands and located above 44 degrees north latitude (Boreal-Arctic region).