Sensitivity Of Ozone Production To Nox And Voc Along The Lake Michigan Coastline

Authors

Michael P. Vermeuel, University of Wisconsin-MadisonFollow
Gordon A. Novak, University of Wisconsin-MadisonFollow
Hariprasad D. Alwe, University of Minnesota Twin CitiesFollow
Dagen D. Hughes, University of IowaFollow
Rob Kaleel, Lake Michigan Air Directors Consortium
Angela F. Dickens, Wisconsin Department Natural ResourcesFollow
Donna Kenski, Lake Michigan Air Directors ConsortiumFollow
Alan C. Czarnetzki, University of Northern IowaFollow
Elizabeth A. Stone, University of Iowa
Charles O. Stanier, University of Iowa
R. Bradley Pierce, University of Wisconsin-MadisonFollow
Dylan B. Millet, University of Minnesota Twin CitiesFollow
Timothy H. Bertram, University of Wisconsin-MadisonFollow

Document Type

Article

Journal/Book/Conference Title

Journal of Geophysical Research: Atmospheres

Volume

124

Issue

20

First Page

10989

Last Page

11006

Abstract

We report on the sensitivity of enhanced ozone (O3) production, observed during lake breeze circulation along the coastline of Lake Michigan, to the concentrations of nitrogen oxides (NOx = NO + NO2) and volatile organic compounds (VOCs). We assess the sensitivity of O3 production to NOx and VOC on a high O3 day during the Lake Michigan Ozone Study 2017 using an observationally constrained chemical box model that implements the Master Chemical Mechanism (MCM v3.3.1) and recent emission inventories for NOx and VOCs. The Master Chemical Mechanism model is coupled to a backward air mass trajectory analysis from a ground supersite in Zion, IL, where an extensive series of measurements of O3 precursors and their oxidation products, including hydrogen peroxide (H2O2), nitric acid (HNO3), and particulate nitrates (NO3−) serve as model constraints. We evaluate the chemical evolution of the Chicago-Gary urban plume as it advects over Lake Michigan and demonstrate how modeled indicators of VOC- versus NOx-sensitive regimes can be constrained by measurements at the trajectory endpoint. Using the modeled ratio of the instantaneous H2O2 and HNO3 production rates (PH2O2/PHNO3), we suggest that O3 production over the urban source region is strongly VOC sensitive and progresses towards a more NOx-sensitive regime as the plume advects north along the Lake Michigan coastline on this day. We also demonstrate that ground-based measurements of the mean concentration ratio of H2O2 to HNO3 describe the sensitivity of O3 production to VOC and NOx as the integral of chemical production along the plume path.

Department

Department of Earth and Environmental Sciences

Department

Department of Earth Science

Original Publication Date

10-27-2019

DOI of published version

10.1029/2019JD030842

Repository

UNI ScholarWorks, Rod Library, University of Northern Iowa

Language

en

Recommended Citation

Vermeuel, Michael P.; Novak, Gordon A.; Alwe, Hariprasad D.; Hughes, Dagen D.; Kaleel, Rob; Dickens, Angela F.; Kenski, Donna; Czarnetzki, Alan C.; Stone, Elizabeth A.; Stanier, Charles O.; Pierce, R. Bradley; Millet, Dylan B.; and Bertram, Timothy H., "Sensitivity Of Ozone Production To Nox And Voc Along The Lake Michigan Coastline" (2019). Faculty Publications. 451.
https://scholarworks.uni.edu/facpub/451