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

C. C. Womack; E. E. McDuffie; Peter Edwards; 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

doi:10.1029/2019GL082028

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

C. C. Womack, E. E. McDuffie, Peter Edwards, 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. RiedelJ. 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

Chemistry

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Abstract

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.

Original language	English
Number of pages	9
Journal	Geophysical Research Letters
Early online date	8 Apr 2019
DOIs	https://doi.org/10.1029/2019GL082028
Publication status	Published - 8 May 2019

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© 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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10.1029/2019GL082028

An Odd Oxygen Framework for Wintertime AmmoniumNitrate Aerosol Pollution in Urban Areas: NOxandVOC Control as Mitigation Strategies
© 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.
Final published version, 1.14 MB

Peter Edwards
- pete.edwardsyork.acuk
- Chemistry - Senior Lecturer
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Womack, C. C., McDuffie, E. E., Edwards, P., Bares, R., de Gouw, J. A., Docherty, K. S., Dube, 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., ... Brown, S. S. (2019). An odd oxygen framework for wintertime ammonium nitrate aerosol pollution in urban areas: NOx and VOC control as mitigation strategies. Geophysical Research Letters. https://doi.org/10.1029/2019GL082028

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

abstract = "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.",

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

note = "{\textcopyright} 2019, American Geophysical Union. This is an author-produced version of the published paper. Uploaded in accordance with the publisher{\textquoteright}s self-archiving policy. Further copying may not be permitted; contact the publisher for details.",

year = "2019",

month = may,

day = "8",

doi = "10.1029/2019GL082028",

language = "English",

journal = "Geophysical Research Letters",

issn = "0094-8276",

publisher = "American Geophysical Union",

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Womack, CC, McDuffie, EE, Edwards, P, Bares, R, de Gouw, JA, Docherty, KS, Dube, WP, Fibiger, DL, Franchin, A, Gilman, JB, Goldberger, L, Lee, BH, Lin, JC, Long, R, Middlebrook, AM, Millet, DB, Moravek, A, Murphy, JG, Quinn, PK, Riedel, TP, Roberts, JM, Thornton, JA, Valin, LC, Veres, PR, Whitehill, AR, Wild, RJ, Warneke, C, Yuan, B, Baasandorj, M & Brown, SS 2019, 'An odd oxygen framework for wintertime ammonium nitrate aerosol pollution in urban areas: NOx and VOC control as mitigation strategies', Geophysical Research Letters. https://doi.org/10.1029/2019GL082028

TY - JOUR

T1 - An odd oxygen framework for wintertime ammonium nitrate aerosol pollution in urban areas: NOx and VOC control as mitigation strategies

AU - Womack, C. C.

AU - McDuffie, E. E.

AU - Edwards, Peter

AU - Bares, R.

AU - de Gouw, J. A.

AU - Docherty, K. S.

AU - Dube, W. P.

AU - Fibiger, D. L.

AU - Franchin, A.

AU - Gilman, J. B.

AU - Goldberger, L.

AU - Lee, B. H.

AU - Lin, J. C.

AU - Long, R.

AU - Middlebrook, A. M.

AU - Millet, D. B.

AU - Moravek, A.

AU - Murphy, J. G.

AU - Quinn, P. K.

AU - Riedel, T. P.

AU - Roberts, J. M.

AU - Thornton, J. A.

AU - Valin, L. C.

AU - Veres, P. R.

AU - Whitehill, A. R.

AU - Wild, R. J.

AU - Warneke, C.

AU - Yuan, B.

AU - Baasandorj, M.

AU - Brown, S. S.

N1 - © 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.

PY - 2019/5/8

Y1 - 2019/5/8

N2 - 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.

AB - 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.

U2 - 10.1029/2019GL082028

DO - 10.1029/2019GL082028

M3 - Article

SN - 0094-8276

JO - Geophysical Research Letters

JF - Geophysical Research Letters

ER -

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

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