Articles | Volume 17, issue 20
Research article
24 Oct 2017
Research article |  | 24 Oct 2017

Contributions of foreign, domestic and natural emissions to US ozone estimated using the path-integral method in CAMx nested within GEOS-Chem

Alan M. Dunker, Bonyoung Koo, and Greg Yarwood

Data sets

Emissions Database for Global Atmospheric Research European Commission

Implementation of the RETRO Anthropogenic W. Reinhart D. and Millet

GEOS-5.2.0 Global Modeling and Assimilation Office (GMAO), NASA Goddard Space Flight Center

World Data Centre for Greenhouse Gases (WDCGG) World Meteorological Organization (WMO)

Model code and software


Short summary
Using global and regional models, we determined the anthropogenic increment to ozone (base-case simulation minus a background simulation with only natural emissions) for the US and allocated the increment to anthropogenic emissions inside and outside the US. For the larger ozone concentrations in the base case, the relative importance of the sources is generally US emissions > anthropogenic lateral boundary concentrations (BCs) > Canadian/Mexican emissions ≫ anthropogenic top BCs.
Final-revised paper