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

Zhao, Yuanhong; Saunois, Marielle; Bousquet, Philippe; Lin, Xin; Berchet, Antoine; Hegglin, Michaela I.; Canadell, Josep G.; Jackson, Robert B.; Deushi, Makoto; Jöckel, Patrick; Kinnison, Douglas; Kirner, Ole; Strode, Sarah; Tilmes, Simone; Dlugokencky, Edward J.; Zheng, Bo

doi:https://doi.org/10.5194/acp-20-13011-2020

Articles | Volume 20, issue 21

https://doi.org/10.5194/acp-20-13011-2020

© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/acp-20-13011-2020

© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 20, issue 21

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, Marielle Saunois, Philippe Bousquet, Xin Lin, Antoine Berchet, Michaela I. Hegglin, Josep G. Canadell, Robert B. Jackson, Makoto Deushi, Patrick Jöckel, Douglas Kinnison, Ole Kirner, Sarah Strode, Simone Tilmes, Edward J. Dlugokencky, and Bo Zheng

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Final revised paper (published on 06 Nov 2020)
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Preprint (discussion started on 24 Apr 2020)
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Interactive discussion

Status: closed

AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment

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SC1: 'A typo in the paper', Yuqiang Zhang, 10 May 2020
- AC1: 'Reply to SC1: ' A typo in the paper'', Y. H. Zhao, 14 Aug 2020
RC1: 'Review of "On the role of trend and variability of hydroxyl radical (OH) in the global methane budget"', Anonymous Referee #1, 26 May 2020
- AC2: 'Reply to RC1: 'Review of "On the role of trend and variability of hydroxyl radical (OH) in the global methane budget"'', Y. H. Zhao, 14 Aug 2020
RC2: 'Referee comments', Anonymous Referee #2, 19 Jun 2020
- AC3: 'Reply to RC2: 'Referee comments'', Y. H. Zhao, 14 Aug 2020

Peer-review completion

AR: Author's response | RR: Referee report | ED: Editor decision

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

AR by Y. H. Zhao on behalf of the Authors (19 Sep 2020) Manuscript

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.