Articles | Volume 16, issue 8
Development and technical paper
28 Apr 2023
Development and technical paper |  | 28 Apr 2023

Comparison of ozone formation attribution techniques in the northeastern United States

Qian Shu, Sergey L. Napelenok, William T. Hutzell, Kirk R. Baker, Barron H. Henderson, Benjamin N. Murphy, and Christian Hogrefe

Data sets

Air Quality System (AQS) U.S. EPA

Model code and software

CMAQ ISAM updated code U.S. EPA

Short summary
Source attribution methods are generally used to determine culpability of precursor emission sources to ambient pollutant concentrations. However, source attribution of secondarily formed pollutants such as ozone and its precursors cannot be explicitly measured, making evaluation of source apportionment methods challenging. In this study, multiple apportionment approach comparisons show common features but still reveal wide variations in predicted sector contribution and species dependency.