| Title: |
Midlatitude Ozone Depletion and Air Quality Impacts from Industrial Halogen Emissions in the Great Salt Lake Basin |
| Authors: |
Caroline C. Womack; Wyndom S. Chace; Siyuan Wang; Munkhbayar Baasandorj; Dorothy L. Fibiger; Alessandro Franchin; Lexie Goldberger; Colin Harkins; Duseong S. Jo; Ben H. Lee; John C. Lin; Brian C. McDonald; Erin E. McDuffie; Ann M. Middlebrook; Alexander Moravek; Jennifer G. Murphy; J. Andrew Neuman; Joel A. Thornton; Patrick R. Veres; Steven S. Brown |
| Publication Year: |
1753 |
| Subject Terms: |
Microbiology; Genetics; Physiology; Evolutionary Biology; Ecology; Marine Biology; Inorganic Chemistry; Science Policy; Environmental Sciences not elsewhere classified; Chemical Sciences not elsewhere classified; report aircraft observations; major urban area; industrial plume near; great salt lake; air quality within; air quality impacts; 949 mg year; 173 mg year; 10 %– 25; bromine radical cycling; industrial halogen emissions; 5 |
| Description: |
We report aircraft observations of extreme levels of HCl and the dihalogens Cl 2 , Br 2 , and BrCl in an industrial plume near the Great Salt Lake, Utah. Complete depletion of O 3 was observed concurrently with halogen enhancements as a direct result of photochemically produced halogen radicals. Observed fluxes for Cl 2 , HCl, and NO x 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 Br 2 and 949 Mg year –1 BrCl, representing a major uncounted oxidant source. A zero-dimensional photochemical box model reproduced the observed O 3 depletions and demonstrated that bromine radical cycling was principally responsible for the rapid O 3 depletion. Inclusion of observed halogen emissions in both the box model and a 3D chemical model showed significant increases in oxidants and particulate matter (PM 2.5 ) in the populated regions of the Great Salt Lake Basin, where winter PM 2.5 is among the most severe air quality issues in the U.S. The model shows regional PM 2.5 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. |
| Document Type: |
other/unknown material |
| Language: |
unknown |
| Relation: |
https://doi.org/10.1021/acs.est.2c05376.s001 |
| DOI: |
10.1021/acs.est.2c05376.s001 |
| Availability: |
https://doi.org/10.1021/acs.est.2c05376.s001 |
| Rights: |
undefined |
| Accession Number: |
edsbas.AAA12F12 |
| Database: |
BASE |