By the same authors

From the same journal

From the same journal

An odd oxygen framework for wintertime ammonium nitrate aerosol pollution in urban areas: NOx and VOC control as mitigation strategies

Research output: Contribution to journalArticlepeer-review


  • C. C. Womack
  • E. E. McDuffie
  • R. Bares
  • J. A. de Gouw
  • K. S. Docherty
  • W. P. Dube
  • D. L. Fibiger
  • A. Franchin
  • J. B. Gilman
  • L. Goldberger
  • B. H. Lee
  • J. C. Lin
  • R. Long
  • A. M. Middlebrook
  • D. B. Millet
  • A. Moravek
  • J. G. Murphy
  • P. K. Quinn
  • T. P. Riedel
  • J. M. Roberts
  • J. A. Thornton
  • L. C. Valin
  • P. R. Veres
  • A. R. Whitehill
  • R. J. Wild
  • C. Warneke
  • B. Yuan
  • M. Baasandorj
  • S. S. Brown


Publication details

JournalGeophysical Research Letters
DateAccepted/In press - 3 Apr 2019
DateE-pub ahead of print - 8 Apr 2019
DatePublished (current) - 8 May 2019
Number of pages9
Early online date8/04/19
Original languageEnglish


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 US, 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 City, Utah demonstrates that ammonium nitrate is closely related to photochemical ozone through a common parameter, total odd oxygen, Ox,total. We show that the traditional NOx‐VOC framework for evaluating ozone mitigation strategies also applies to ammonium nitrate. Despite being nitrate‐limited, ammonium nitrate aerosol pollution in Salt Lake City is responsive to VOC 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.

Bibliographical note

© 2019, American Geophysical Union. This is an author-produced version of the published paper. Uploaded in accordance with the publisher’s self-archiving policy. Further copying may not be permitted; contact the publisher for details.

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