Characterizing model errors in chemical transport modeling of methane: impact of model resolution in versions v9-02 of GEOS-Chem and v35j of its adjoint model

Stanevich, Ilya; Jones, Dylan B. A.; Strong, Kimberly; Parker, Robert J.; Boesch, Hartmut; Wunch, Debra; Notholt, Justus; Petri, Christof; Warneke, Thorsten; Sussmann, Ralf; Schneider, Matthias; Hase, Frank; Kivi, Rigel; Deutscher, Nicholas M.; Velazco, Voltaire A.; Walker, Kaley A.; Deng, Feng

doi:https://doi.org/10.5194/gmd-13-3839-2020

Articles | Volume 13, issue 9

https://doi.org/10.5194/gmd-13-3839-2020

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

https://doi.org/10.5194/gmd-13-3839-2020

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

Articles | Volume 13, issue 9

Model evaluation paper

|

31 Aug 2020

Model evaluation paper |

| 31 Aug 2020

Characterizing model errors in chemical transport modeling of methane: impact of model resolution in versions v9-02 of GEOS-Chem and v35j of its adjoint model

Ilya Stanevich, Dylan B. A. Jones, Kimberly Strong, Robert J. Parker, Hartmut Boesch, Debra Wunch, Justus Notholt, Christof Petri, Thorsten Warneke, Ralf Sussmann, Matthias Schneider, Frank Hase, Rigel Kivi, Nicholas M. Deutscher, Voltaire A. Velazco, Kaley A. Walker, and Feng Deng

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Final revised paper (published on 31 Aug 2020)
Preprint (discussion started on 15 Nov 2019)

Interactive discussion

Status: closed

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

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RC1: 'Review of Stanevich et al.', Anonymous Referee #1, 06 Jan 2020
RC2: 'Review', Anonymous Referee #2, 14 Jan 2020
AC1: 'Author comment on "Characterizing model errors in chemical transport modeling of methane: Impact of model resolution in versions v9-02 of GEOS-Chem and v35j of its adjoint model"', Dylan Jones, 04 Apr 2020

Peer-review completion

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

AR by Dylan Jones on behalf of the Authors (04 Apr 2020) Author's response Manuscript

ED: Publish as is (06 May 2020) by Fiona O'Connor

AR by Dylan Jones on behalf of the Authors (16 May 2020)

Short summary

Systematic errors in atmospheric models pose a challenge for inverse modeling studies of methane (CH₄) emissions. We evaluated the CH₄ simulation in the GEOS-Chem model at the horizontal resolutions of 4° × 5° and 2° × 2.5°. Our analysis identified resolution-dependent biases in the model, which we attributed to discrepancies between the two model resolutions in vertical transport in the troposphere and in stratosphere–troposphere exchange.