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Description

This dataset holds estimates of methane emissions derived from a dual tracer inversion of atmospheric measurements of CH4 mole fractions and d13CH4 isotopic values. The measurements were assimilated in the TM5 4-Dimensional Variational (TM5-4DVAR) source-sink inversion system to estimate methane emissions from fossil fuel, microbial, and pyrogenic sources. These estimates include monthly means of methane emissions from each source and all three sources combined at 1-degree longitude x 1-degree latitude spatial resolution globally and monthly totals across all global grid cells from each source and all three sources combined from 1999 to 2016. The data are provided in netCDF version 4 format.

Product Summary

Platforms
COMPUTERS
Instruments
Computer
Projects
NACP ,
U.S. GHG Center
Spatial Extent

N: 90 S: -90 E: 180 W: -180

Location
GLOBAL
Coordinate System
CARTESIAN
Granule Spatial Representation
CARTESIAN
Temporal Extent
1999-01-01 to 2016-12-31
Data Partner
THE OAK RIDGE NATIONAL LABORATORY (ORNL) DISTRIBUTED ACTIVE ARCHIVE CENTER (DAAC) (ORNL_DAAC)
Concept ID
C3497591703-ORNL_CLOUD
Data State
COMPLETE
Number of Files/Granules
17
Processing Level
4
Published
Updated
Science Keywords
Methane ,
Methane Production/Use

Citation

Citation is critically important for dataset documentation and discovery. This dataset is openly shared, without restriction, in accordance with the EOSDIS Data Use and Citation Guidance.

Copy Citation

Basu, S., Lan, X., Michel, S. E., Dlugokencky, E., & Schwietzke, S. (2025). TM5-4DVAR Global Monthly Source-disaggregated Methane Emissions, 1999-2016 (Version 1). ORNL Distributed Active Archive Center. https://doi.org/10.3334/ORNLDAAC/2411 Date Accessed: 2026-08-14

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