Articles | Volume 20, issue 15
Atmos. Chem. Phys., 20, 9525–9546, 2020
https://doi.org/10.5194/acp-20-9525-2020
Atmos. Chem. Phys., 20, 9525–9546, 2020
https://doi.org/10.5194/acp-20-9525-2020

Research article 13 Aug 2020

Research article | 13 Aug 2020

Influences of hydroxyl radicals (OH) on top-down estimates of the global and regional methane budgets

Yuanhong Zhao et al.

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Short summary
The hydroxyl radical (OH), which is the dominant sink of methane (CH4), plays a key role in closing the global methane budget. This study quantifies how uncertainties in the hydroxyl radical can influence top-down estimates of CH4 emissions based on 4D Bayesian inversions with different OH fields and the same surface observations. We show that uncertainties in CH4 emissions driven by different OH fields are comparable to the uncertainties given by current bottom-up and top-down estimations.
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