Reconciling the bottom-up and top-down estimates of the methane chemical sink using multiple observations

Zhao, Yuanhong; Saunois, Marielle; Bousquet, Philippe; Lin, Xin; Hegglin, Michaela I.; Canadell, Josep G.; Jackson, Robert B.; Zheng, Bo

doi:https://doi.org/10.5194/acp-23-789-2023

Articles | Volume 23, issue 1

https://doi.org/10.5194/acp-23-789-2023

© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/acp-23-789-2023

© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 23, issue 1

Research article

|

17 Jan 2023

Research article |

| 17 Jan 2023

Reconciling the bottom-up and top-down estimates of the methane chemical sink using multiple observations

Yuanhong Zhao, Marielle Saunois, Philippe Bousquet, Xin Lin, Michaela I. Hegglin, Josep G. Canadell, Robert B. Jackson, and Bo Zheng

Supplement

https://doi.org/10.5194/acp-23-789-2023-supplement

Data sets

CCMI-1 Data Archive CEDA Archive http://data.ceda.ac.uk/badc/wcrp-ccmi/data/CCMI-1/output

Download

Article (4973 KB)
Full-text XML

Short summary

The large uncertainties in OH simulated by atmospheric chemistry models hinder accurate estimates of CH₄ chemical loss through the bottom-up method. This study presents a new approach based on OH precursor observations and a chemical box model to improve the tropospheric OH distributions simulated by atmospheric chemistry models. Through this approach, both the global OH burden and the corresponding methane chemical loss reach consistency with the top-down method based on MCF inversions.