Comprehensive isoprene and terpene gas-phase chemistry improves simulated surface ozone in the southeastern US

Schwantes, Rebecca H.; Emmons, Louisa K.; Orlando, John J.; Barth, Mary C.; Tyndall, Geoffrey S.; Hall, Samuel R.; Ullmann, Kirk; St. Clair, Jason M.; Blake, Donald R.; Wisthaler, Armin; Bui, Thao Paul V.

doi:https://doi.org/10.5194/acp-20-3739-2020

Articles | Volume 20, issue 6

https://doi.org/10.5194/acp-20-3739-2020

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

https://doi.org/10.5194/acp-20-3739-2020

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

Articles | Volume 20, issue 6

Research article

|

30 Mar 2020

Research article |

| 30 Mar 2020

Comprehensive isoprene and terpene gas-phase chemistry improves simulated surface ozone in the southeastern US

Rebecca H. Schwantes, Louisa K. Emmons, John J. Orlando, Mary C. Barth, Geoffrey S. Tyndall, Samuel R. Hall, Kirk Ullmann, Jason M. St. Clair, Donald R. Blake, Armin Wisthaler, and Thao Paul V. Bui

Supplement

https://doi.org/10.5194/acp-20-3739-2020-supplement

Data sets

CESM/CAM-chem Data for Evaluation of MOZART-TS2 R. H. Schwantes and L. K. Emmons https://doi.org/10.5065/70zg-0t17

Gas-phase Chemistry, CAM-chem Wiki R. H. Schwantes https://wiki.ucar.edu/display/camchem/Gas-Phase+Chemistry

Model code and software

Downloading CESM2 NCAR https://escomp.github.io/CESM/release-cesm2/downloading_cesm.html

Getting BOXMOX, Box Modeling C. Knote and J. Barre https://boxmodeling.meteo.physik.uni-muenchen.de/downloads/boxmox.html

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Short summary

Ozone is a greenhouse gas and air pollutant that is harmful to human health and plants. During the summer in the southeastern US, many regional and global models are biased high for surface ozone compared to observations. Here adding more complex and updated chemistry for isoprene and terpenes, which are biogenic hydrocarbons emitted from trees and vegetation, into an earth system model greatly reduces the simulated surface ozone bias compared to aircraft and monitoring station data.