Midlatitude Ozone Depletion and Air Quality Impacts from Industrial Halogen Emissions in the Great Salt Lake Basin

Womack, C.C.; Chace, W.S.; Wang, S.; Baasandorj, M.; Fibiger, D.L.; Franchin, A.; Goldberger, L.; Harkins, C.; Jo, D.S.; Lee, B.H.; Lin, J.C.; McDonald, B.C.; McDuffie, E.E.; Middlebrook, A.M.; Moravek, A.; Murphy, J.G.; Neuman, J.A.; Thornton, J.A.; Veres, P.R.; Brown, S.S.

doi:10.1021/acs.est.2c05376

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The NOAA IR serves as an archival repository of NOAA-published products including scientific findings, journal articles, guidelines, recommendations, or other information authored or co-authored by NOAA or funded partners. As a repository, the NOAA IR retains documents in their original published format to ensure public access to scientific information.

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Midlatitude Ozone Depletion and Air Quality Impacts from Industrial Halogen Emissions in the Great Salt Lake Basin

2023
By Womack, C.C. ; Chace, W.S. ; Wang, S. ; ...
Source: Environ Sci Technol. 2023 Feb 7;57(5):1870-1881

[PDF-1.05 MB]

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Details:

Journal Title:

Environmental Science & Technology
Personal Author:

Womack, C.C. ; Chace, W.S. ; Wang, S. ; Baasandorj, M. ; Fibiger, D.L. ; ... More +

Womack, C.C. ; Chace, W.S. ; Wang, S. ; Baasandorj, M. ; Fibiger, D.L. ; Franchin, A. ; Goldberger, L. ; Harkins, C. ; Jo, D.S. ; Lee, B.H. ; Lin, J.C. ; McDonald, B.C. ; McDuffie, E.E. ; Middlebrook, A.M. ; Moravek, A. ; Murphy, J.G. ; Neuman, J.A. ; Thornton, J.A. ; Veres, P.R. ; Brown, S.S. Less -
NOAA Program & Office:

OAR (Oceanic and Atmospheric Research) ; CSL (Chemical Sciences Laboratory) ; CIRES (Cooperative Institute for Research in Environmental Sciences)

OAR (Oceanic and Atmospheric Research) ; CSL (Chemical Sciences Laboratory) ; CIRES (Cooperative Institute for Research in Environmental Sciences) Less -
Description:

We report aircraft observations of extreme levels of HCl and the dihalogens Cl2, Br2, and BrCl in an industrial plume near the Great Salt Lake, Utah. Complete depletion of O3 was observed concurrently with halogen enhancements as a direct result of photochemically produced halogen radicals. Observed fluxes for Cl2, HCl, and NOx agreed with facility-reported emissions inventories. Bromine emissions are not required to be reported in the inventory, but are estimated as 173 Mg year–1 Br2 and 949 Mg year–1 BrCl, representing a major uncounted oxidant source. A zero-dimensional photochemical box model reproduced the observed O3 depletions and demonstrated that bromine radical cycling was principally responsible for the rapid O3 depletion. Inclusion of observed halogen emissions in both the box model and a 3D chemical model showed significant increases in oxidants and particulate matter (PM2.5) in the populated regions of the Great Salt Lake Basin, where winter PM2.5 is among the most severe air quality issues in the U.S. The model shows regional PM2.5 increases of 10%–25% attributable to this single industrial halogen source, demonstrating the impact of underreported industrial bromine emissions on oxidation sources and air quality within a major urban area of the western U.S.
Keywords:

[+]

Air Quality Chemical Models Halogens Oxidizing Agents Industrial Emissions Oxidants
Source:

Environ Sci Technol. 2023 Feb 7;57(5):1870-1881
DOI:

https://doi.org/10.1021/acs.est.2c05376
Format:

PDF
Document Type:

Journal Article
Funding:

NA17OAR4320101
Rights Information:

Accepted Manuscript
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Submitted
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urn:sha-512:13f507e5c37e1a0b036c8d6d9de70bc8546965d49d1889085867d877c9dd3c583d4565d83340c230f63845f7de36a30dc3410be7922f663f3918d09de3efea14
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