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Geoscientific Model Development An interactive open-access journal of the European Geosciences Union
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Preprints
https://doi.org/10.5194/gmd-2020-110
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/gmd-2020-110
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

Submitted as: model description paper 23 Apr 2020

Submitted as: model description paper | 23 Apr 2020

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A revised version of this preprint was accepted for the journal GMD and is expected to appear here in due course.

Description and evaluation of a detailed gas-phase chemistry scheme in the TM5-MP global chemistry transport model (r112)

Stelios Myriokefalitakis1, Nikos Daskalakis2, Angelos Gkouvousis3,1, Andreas Hilboll,2, Twan van Noije4, Jason E. Williams4, Philippe Le Sager4, Vincent Huijnen4, Sander Houweling5,6, Tommi Bergman7, Johann Rasmus Nüß2, Mihalis Vrekoussis2,8,9, Maria Kanakidou2,3, and Maarten C. Krol10,11 Stelios Myriokefalitakis et al.
  • 1Institute for Environmental Research and Sustainable Development (IERSD), National Observatory of Athens, Penteli, Greece
  • 2Institute of Environmental Physics, University of Bremen, Bremen, Germany
  • 3Environmental Chemical Processes Laboratory (ECPL), Department of Chemistry, University of Crete, Heraklion, Greece
  • 4Royal Netherlands Meteorological Institute (KNMI), De Bilt, the Netherlands
  • 5Department of Earth Sciences, Vrije Universiteit Amsterdam, the Netherlands
  • 6SRON Netherlands Institute for Space Research, Utrecht, the Netherlands
  • 7Finnish Meteorological Institute, Climate System Research, Helsinki, Finland
  • 8Center for Marine Environmental Sciences, University of Bremen, Bremen, Germany
  • 9Energy, Environment and Water Research Center (EEWRC), The Cyprus Institute, Cyprus
  • 10Wageningen University, Wageningen, the Netherlands
  • 11Institute for Marine and Atmospheric Research (IMAU), Utrecht University, Utrecht, the Netherlands
  • deceased, 25 March 2020

Abstract. This work documents and evaluates the tropospheric gas-phase chemical mechanism MOGUNTIA in the three-dimensional chemistry transport model TM5-MP. Compared to the modified CB05 chemical mechanism previously used in the model, the MOGUNTIA includes a detailed representation of the light hydrocarbons (C1-C4) and isoprene, along with a simplified chemistry representation of terpenes and aromatics. Another feature implemented in TM5-MP for this work is the use of the Rosenbrock solver in the chemistry code, which can replace the classical Euler Backward Integration method of the model. Global budgets of ozone (O3), carbon monoxide (CO), hydroxyl radicals (OH), nitrogen oxides (NOX) and volatile organic compounds (VOCs) are here analyzed and their mixing ratios are compared with a series of surface, aircraft and satellite observations for the year 2006. Both mechanisms appear to be able to represent satisfactorily observed mixing ratios of important trace gases, with the MOGUNTIA chemistry configuration yielding lower biases compared to measurements in most of the cases. However, the two chemical mechanisms fail to reproduce the observed mixing ratios of light VOCs, indicating insufficient primary emission source strengths, too weak vertical mixing in the boundary layer, and/or a low bias in the secondary contribution of C2-C3 organics via VOC atmospheric oxidation. Relative computational memory and time requirements of the different model configurations are also compared and discussed. Overall, compared to other chemistry schemes in use in global CTMs, the MOGUNTIA scheme simulates a large suite of oxygenated VOCs that are observed in the atmosphere at significant levels and are involved in aerosol formation, expanding, thus, the applications of TM5-MP.

Stelios Myriokefalitakis et al.

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Interactive discussion

Status: closed
Status: closed
AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
Printer-friendly Version - Printer-friendly version Supplement - Supplement

Stelios Myriokefalitakis et al.

Model code and software

TM5-MP global chemistry transport model (r1112) S. Myriokefalitakis, N. Daskalakis, A. Gkouvousis, A. Hilboll, T. van Noije, J. E. Williams, P. Le Sager, V. Huijnen, S. Houweling, T. Bergman, J. R. Nüß, M. Vrekoussis, M. Kanakidou, and M. C. Krol https://doi.org/10.5281/zenodo.3759201

Stelios Myriokefalitakis et al.

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Short summary
This work documents and evaluates the detailed tropospheric gas-phase chemical mechanism MOGUNTIA in the three-dimensional chemistry transport model (CTM) TM5-MP. Moreover, the Rosenbrock solver, as generated by the KPP software, is implemented in the chemistry code, which can replace the classical Euler Backward Integration method. Overall, compared to other chemistry schemes in use in CTMs, the MOGUNTIA simulates a large suite of oxygenated VOCs, expanding the applications of the model.
This work documents and evaluates the detailed tropospheric gas-phase chemical mechanism...
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