Details:

Journal Title:
Geophysical Research Letters
Personal Author:
Womack, C. C.; McDuffie, E. E.; Edwards, P. M.; Bares, R.; de Gouw, J. A.; ... More +
Womack, C. C.; McDuffie, E. E.; Edwards, P. M.; Bares, R.; de Gouw, J. A.; Docherty, K. S.; Dubé, W. P.; Fibiger, D. L.; Franchin, A.; Gilman, J. B.; Goldberger, L.; Lee, B. H.; Lin, J. C.; Long, R.; Middlebrook, A. M.; Millet, D. B.; Moravek, A.; Murphy, J. G.; Quinn, P. K.; Riedel, T. P.; Roberts, J. M.; Thornton, J. A.; Valin, L. C.; Veres, P. R.; Whitehill, A. R.; Wild, R. J.; Warneke, C.; Yuan, B.; Baasandorj, M.; Brown, S. S.; Less -
NOAA Program & Office:
CIRES (Cooperative Institute for Research in Environmental Sciences); CSL (Chemical Sciences Laboratory); ESRL (Earth System Research Laboratory); OAR (Oceanic and Atmospheric Research); PMEL (Pacific Marine Environmental Laboratory);
CIRES (Cooperative Institute for Research in Environmental Sciences); CSL (Chemical Sciences Laboratory); ESRL (Earth System Research Laboratory); OAR (Oceanic and Atmospheric Research); PMEL (Pacific Marine Environmental Laboratory); Less -
Description:
Wintertime ammonium nitrate aerosol pollution is a severe air quality issue affecting both developed and rapidly urbanizing regions from Europe to East Asia. In the United States, it is acute in western basins subject to inversions that confine pollutants near the surface. Measurements and modeling of a wintertime pollution episode in Salt Lake Valley, Utah, demonstrate that ammonium nitrate is closely related to photochemical ozone through a common parameter, total odd oxygen, Ox,total. We show that the traditional nitrogen oxide and volatile organic compound (NOx-VOC) framework for evaluating ozone mitigation strategies also applies to ammonium nitrate. Despite being nitrate-limited, ammonium nitrate aerosol pollution in Salt Lake Valley is responsive to VOCs control and, counterintuitively, not initially responsive to NOx control. We demonstrate simultaneous nitrate limitation and NOx saturation and suggest this phenomenon may be general. This finding may identify an unrecognized control strategy to address a global public health issue in regions with severe winter aerosol pollution.
Keywords:
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Air Quality
Ammonium Nitrate

Source:
Geophysical Research Letters, 46(9), 4971-4979
DOI:
https://doi.org/10.1029/2019GL082028
Document Type:
Journal Article;
Rights Information:
Other
Compliance:
Submitted
Main Document Checksum:
[+]
urn:sha256:eadb325c5658f9f81ddc60ae1582be1ea21ca89c61d42ee864390724324dcda1
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