Articles | Volume 24, issue 15
https://doi.org/10.5194/acp-24-8607-2024
© Author(s) 2024. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/acp-24-8607-2024
© Author(s) 2024. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
02 Aug 2024
Research article |
| 02 Aug 2024
| 02 Aug 2024
Intercomparison of GEOS-Chem and CAM-chem tropospheric oxidant chemistry within the Community Earth System Model version 2 (CESM2)
John A. Paulson School of Engineering and Applied Sciences, Harvard University, Cambridge, MA, USA
Louisa K. Emmons
Atmospheric Chemistry Observations and Modeling Laboratory, National Center for Atmospheric Research, Boulder, CO, USA
Elizabeth W. Lundgren
John A. Paulson School of Engineering and Applied Sciences, Harvard University, Cambridge, MA, USA
Laura Hyesung Yang
John A. Paulson School of Engineering and Applied Sciences, Harvard University, Cambridge, MA, USA
John A. Paulson School of Engineering and Applied Sciences, Harvard University, Cambridge, MA, USA
Ruijun Dang
John A. Paulson School of Engineering and Applied Sciences, Harvard University, Cambridge, MA, USA
Shixian Zhai
John A. Paulson School of Engineering and Applied Sciences, Harvard University, Cambridge, MA, USA
Earth and Environmental Sciences Programme and Graduate Division of Earth and Atmospheric Sciences, Faculty of Science, The Chinese University of Hong Kong, Sha Tin, Hong Kong SAR, China
Yunxiao Tang
Department of Earth and Planetary Sciences, Harvard University, Cambridge, MA, USA
Makoto M. Kelp
Department of Earth and Planetary Sciences, Harvard University, Cambridge, MA, USA
Department of Earth System Science, Stanford University, Stanford, CA, USA
Nadia K. Colombi
Department of Earth and Planetary Sciences, Harvard University, Cambridge, MA, USA
Sebastian D. Eastham
Joint Program on the Science and Policy of Global Change, Center for Global Change Science, Massachusetts Institute of Technology, Cambridge, MA, USA
Laboratory for Aviation and the Environment, Department of Aeronautics and Astronautics, Massachusetts Institute of Technology, Cambridge, MA, USA
Thibaud M. Fritz
Laboratory for Aviation and the Environment, Department of Aeronautics and Astronautics, Massachusetts Institute of Technology, Cambridge, MA, USA
Daniel J. Jacob
John A. Paulson School of Engineering and Applied Sciences, Harvard University, Cambridge, MA, USA
Department of Earth and Planetary Sciences, Harvard University, Cambridge, MA, USA
Model code and software
GEOS-Chem chemistry module version 14.1.2 within the Community Earth System Model version 2 [code] Thibaud M. Fritz, et al. https://github.com/geoschem/CAM
The Community Atmosphere Model version 6.3.118 [code] The Community Atmosphere Model Developers https://github.com/ESCOMP/CAM/tree/cam6_3_118
The Community Atmosphere Model version 6.3.147 [code] The Community Atmosphere Model Developers https://github.com/ESCOMP/CAM/tree/cam6_3_147
Short summary
Tropospheric ozone is a major air pollutant, a greenhouse gas, and a major indicator of model skill. Global atmospheric chemistry models show large differences in simulations of tropospheric ozone, but isolating sources of differences is complicated by different model environments. By implementing the GEOS-Chem model side by side to CAM-chem within a common Earth system model, we identify and evaluate specific differences between the two models and their impacts on key chemical species.
Tropospheric ozone is a major air pollutant, a greenhouse gas, and a major indicator of model...
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