Articles | Volume 19, issue 21
Atmos. Chem. Phys., 19, 13701–13723, 2019
https://doi.org/10.5194/acp-19-13701-2019
Atmos. Chem. Phys., 19, 13701–13723, 2019
https://doi.org/10.5194/acp-19-13701-2019
Research article
13 Nov 2019
Research article | 13 Nov 2019

Inter-model comparison of global hydroxyl radical (OH) distributions and their impact on atmospheric methane over the 2000–2016 period

Yuanhong Zhao et al.

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Short summary
The role of hydroxyl radical changes in methane trends is debated, hindering our understanding of the methane cycle. This study quantifies how uncertainties in the hydroxyl radical may influence methane abundance in the atmosphere based on the inter-model comparison of hydroxyl radical fields and model simulations of CH4 abundance with different hydroxyl radical scenarios during 2000–2016. We show that hydroxyl radical changes could contribute up to 54 % of model-simulated methane biases.
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