Articles | Volume 20, issue 21
Atmos. Chem. Phys., 20, 13011–13022, 2020
https://doi.org/10.5194/acp-20-13011-2020
Atmos. Chem. Phys., 20, 13011–13022, 2020
https://doi.org/10.5194/acp-20-13011-2020

Research article 06 Nov 2020

Research article | 06 Nov 2020

On the role of trend and variability in the hydroxyl radical (OH) in the global methane budget

Yuanhong Zhao et al.

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AR by Y. H. Zhao on behalf of the Authors (14 Aug 2020)  Author's response    Manuscript
ED: Publish as is (10 Sep 2020) by Martin Heimann
Short summary
Decadal trends and variations in OH are critical for understanding atmospheric CH4 evolution. We quantify the impacts of OH trends and variations on the CH4 budget by conducting CH4 inversions on a decadal scale with an ensemble of OH fields. We find the negative OH anomalies due to enhanced fires can reduce the optimized CH4 emissions by up to 10 Tg yr−1 during El Niño years and the positive OH trend from 1986 to 2010 results in a ∼ 23 Tg yr−1 additional increase in optimized CH4 emissions.
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