Reactive uptake coefficients for N2O5 determined from aircraft measurements during the Second Texas Air Quality Study

Comparison to current model parameterizations

Steven S. Brown, William P. Dubé, Hendrik Fuchs, Thomas B. Ryerson, Adam G. Wollny, Charles A. Brock, Roya Bahreini, Ann M. Middlebrook, T. Andrew Neuman, Elliot L Atlas, James M. Roberts, Hans D. Osthoff, Michael Trainer, Frederick C. Fehsenfeld, A. R. Ravishankara

Research output: Contribution to journalArticle

78 Citations (Scopus)

Abstract

This paper presents determinations of reactive uptake coefficients for N2O5, γ(N2O5), on aerosols from nighttime aircraft measurements of ozone, nitrogen oxides, and aerosol surface area on the NOAA P-3 during Second Texas Air Quality Study (TexAQS II). Determinations based on both the steady state approximation for NO3 and N2O5 and a plume modeling approach yielded γ(N2O5) substantially smaller than current parameterizations used for atmospheric modeling and generally in the range 0.5-6 × 10-3. Dependence of γ(N2O5) on variables such as relative humidity and aerosol composition was not apparent in the determinations, although there was considerable scatter in the data. Determinations were also inconsistent with current parameterizations of the rate coefficient for homogenous hydrolysis of N2O5 by water vapor, which may be as much as a factor of 10 too large. Nocturnal halogen activation via conversion of N2O5 to CINO2 on chloride aerosol was not determinable from these data, although limits based on laboratory parameterizations and maximum nonrefractory aerosol chloride content showed that this chemistry could have been comparable to direct production of HNO3 in some cases.

Original languageEnglish (US)
Article numberDOOF10
JournalJournal of Geophysical Research C: Oceans
Volume114
Issue number11
DOIs
StatePublished - Jun 16 2009

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air quality
airborne survey
Parameterization
Aerosols
parameterization
Air quality
aircraft
aerosols
Aircraft
aerosol
coefficients
chloride
Chlorides
aerosol composition
atmospheric modeling
chlorides
Nitrogen Oxides
halogen
nitrogen oxides
Halogens

ASJC Scopus subject areas

  • Atmospheric Science
  • Geophysics
  • Earth and Planetary Sciences (miscellaneous)
  • Space and Planetary Science

Cite this

Reactive uptake coefficients for N2O5 determined from aircraft measurements during the Second Texas Air Quality Study : Comparison to current model parameterizations. / Brown, Steven S.; Dubé, William P.; Fuchs, Hendrik; Ryerson, Thomas B.; Wollny, Adam G.; Brock, Charles A.; Bahreini, Roya; Middlebrook, Ann M.; Neuman, T. Andrew; Atlas, Elliot L; Roberts, James M.; Osthoff, Hans D.; Trainer, Michael; Fehsenfeld, Frederick C.; Ravishankara, A. R.

In: Journal of Geophysical Research C: Oceans, Vol. 114, No. 11, DOOF10, 16.06.2009.

Research output: Contribution to journalArticle

Brown, SS, Dubé, WP, Fuchs, H, Ryerson, TB, Wollny, AG, Brock, CA, Bahreini, R, Middlebrook, AM, Neuman, TA, Atlas, EL, Roberts, JM, Osthoff, HD, Trainer, M, Fehsenfeld, FC & Ravishankara, AR 2009, 'Reactive uptake coefficients for N2O5 determined from aircraft measurements during the Second Texas Air Quality Study: Comparison to current model parameterizations', Journal of Geophysical Research C: Oceans, vol. 114, no. 11, DOOF10. https://doi.org/10.1029/2008JD011679
Brown, Steven S. ; Dubé, William P. ; Fuchs, Hendrik ; Ryerson, Thomas B. ; Wollny, Adam G. ; Brock, Charles A. ; Bahreini, Roya ; Middlebrook, Ann M. ; Neuman, T. Andrew ; Atlas, Elliot L ; Roberts, James M. ; Osthoff, Hans D. ; Trainer, Michael ; Fehsenfeld, Frederick C. ; Ravishankara, A. R. / Reactive uptake coefficients for N2O5 determined from aircraft measurements during the Second Texas Air Quality Study : Comparison to current model parameterizations. In: Journal of Geophysical Research C: Oceans. 2009 ; Vol. 114, No. 11.
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