Global Methane, CO, and MCF Emissions - Year 2020
Published:
Dataset
Data: Global_Emissions_CH4_CO_MCF_2020.nc
Contact: Xueying Yu (xyu2@albany.edu); Dylan Millet (dbm@umn.edu)
Description
Global emissions of methane, carbon monoxide, and methyl chloroform for the year 2020. Emission estimates are derived using a four-dimensional variational (4D‑Var) data assimilation in the GEOS-Chem Adjoint Model that integrates space‑based observations of methane, formaldehyde (HCHO), and carbon monoxide from the TROPOspheric Monitoring Instrument (TROPOMI), along with in situ NOAA measurements of methyl chloroform.
Spatial resolution: 4° × 5°
Temporal resolution: monthly
Time period: Jan 2020 – Dec 2020
Variables
EMIS_CH4: Global methane emissions from TROPOMI-based methane oxidation chain assimilation
EMIS_CH4_UNC: Uncertainties of the global methane emissions
EMIS_CO: Global CO emissions from TROPOMI-based methane oxidation chain assimilation
EMIS_CO_UNC: Uncertainties of the global CO emissions
EMIS_MCF: Global MCF emissions from TROPOMI-based methane oxidation chain assimilation
EMIS_MCF_UNC: Uncertainties of the global MCF emissions
Citation
Yu, X., & Millet, D. (2026). Global Emissions of Methane, Carbon Monoxide, and Methyl Chloroform for the Year 2020 [Data set]. Zenodo. https://doi.org/10.5281/zenodo.19686597
Yu, X., Millet, D. B., Henze, D. K., Worden, H., Vigouroux, C., Patra, P., Hill, J. D., & Jackson, R. B. (2026). Multi-species constraints resolve methane source versus sink changes: lessons from 2020. Earth’s Future, in press.