Articles | Volume 17, issue 16
https://doi.org/10.5194/acp-17-9931-2017
https://doi.org/10.5194/acp-17-9931-2017
Research article
 | 
24 Aug 2017
Research article |  | 24 Aug 2017

Modeling intercontinental transport of ozone in North America with CAMx for the Air Quality Model Evaluation International Initiative (AQMEII) Phase 3

Uarporn Nopmongcol, Zhen Liu, Till Stoeckenius, and Greg Yarwood

Data sets

CAMx data CAMx http://www.camx.com/

AQS EPA https://www.epa.gov/aqs

CASTNET EPA https://www.epa.gov/castnet

AQMEII European Commission http://aqmeii.jrc.ec.europa.eu/

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Short summary
The CAMx regional model was used to examine contribution of intercontinental transport over North America as part of AQMEII Phase III. Largest boundary condition (BC) contributions to ozone (O3) are from the mid-troposphere. Lower emissions in Asia by 20 % causes a near-linear relationship between the BC O3 changes and surface O3 changes in the western US, but the changes are less than 1 ppb. Using inert tracers leads to high bias over 10 ppb compared to using chemically reactive tracers.
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