Articles | Volume 23, issue 14
Research article
28 Jul 2023
Research article |  | 28 Jul 2023

Atmospheric data support a multi-decadal shift in the global methane budget towards natural tropical emissions

Alice Drinkwater, Paul I. Palmer, Liang Feng, Tim Arnold, Xin Lan, Sylvia E. Michel, Robert Parker, and Hartmut Boesch

Data sets

CMS: Global 0.5-deg Wetland Methane Emissions and Uncertainty (WetCHARTs v1.0) A. A. Bloom, K. Bowman, M. Lee, A. J. Turner, R. Schroeder, J. R. Worden, R. J. Weidner, K. C. McDonald, and D. J. Jacob

Short summary
Changes in atmospheric methane over the last few decades are largely unexplained. Previous studies have proposed different hypotheses to explain short-term changes in atmospheric methane. We interpret observed changes in atmospheric methane and stable isotope source signatures (2004–2020). We argue that changes over this period are part of a large-scale shift from high-northern-latitude thermogenic energy emissions to tropical biogenic emissions, particularly from North Africa and South America.
Final-revised paper