Composition and Chemistry

Measurement of peroxycarboxylic nitric anhydrides (PANs) during the ITCT 2K2 aircraft intensive experiment

  1. James M. Roberts1,
  2. Frank Flocke2,
  3. Gao Chen3,
  4. Joost de Gouw1,
  5. John S. Holloway1,
  6. Gerd Hübler1,
  7. J. Andrew Neuman1,
  8. Dennis K. Nicks Jr.1,4,
  9. John B. Nowak1,
  10. David D. Parrish1,
  11. Thomas B. Ryerson1,
  12. Donna T. Sueper1,
  13. Carsten Warneke1,
  14. Fred C. Fehsenfeld1

Article first published online: 3 DEC 2004

DOI: 10.1029/2004JD004960

Issue

Journal of Geophysical Research: Atmospheres (1984–2012)

Journal of Geophysical Research: Atmospheres (1984–2012)

Volume 109, Issue D23, 16 December 2004

Additional Information

How to Cite

Roberts, J. M., et al. (2004), Measurement of peroxycarboxylic nitric anhydrides (PANs) during the ITCT 2K2 aircraft intensive experiment, J. Geophys. Res., 109, D23S21, doi:10.1029/2004JD004960.

Author Information

  1. 1

    NOAA/Environmental Research Laboratory Aeronomy Laboratory and Cooperative Institute for Research in the Environmental Sciences, University of Colorado, Boulder, Colorado, USA

  2. 2

    Atmospheric Chemistry Division, National Center for Atmospheric Research, Boulder, Colorado, USA

  3. 3

    NASA Langley Research Center, Hampton, Virginia, USA

  4. 4

    Now at Ball Aerospace, Boulder, Colorado, USA.

Publication History

  1. Issue published online: 3 DEC 2004
  2. Article first published online: 3 DEC 2004
  3. Manuscript Accepted: 4 OCT 2004
  4. Manuscript Revised: 17 SEP 2004
  5. Manuscript Received: 27 APR 2004

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Keywords:

  • peroxyacetic nitric anhydride;
  • Asian pollution;
  • eastern Pacific

[1] Measurements of peroxycarboxylic nitric anhydrides (PANs), peroxyacetic nitric anhydride (CH3C(O)OONO2; PAN), and peroxypropionic nitric anhydride (CH3CH2C(O)OONO2; PPN) were made in the spring of 2002, off the west coast of North America, as part of the Intercontinental Transport and Chemical Transformation 2002 (ITCT 2K2) project. Long-range transport of Asian emissions was observed in which PAN and PPN mixing ratios were as high as 650 pptv and 90 pptv, respectively. Moreover, these two species constituted as much as 80% of the odd nitrogen (NOy) in those air masses, and median PAN/NOy was more than 60% at altitudes of 4 km and above. Systematic differences in the ratio of PPN to PAN were observed in air masses that had been impacted by Asian urban emissions relative to those impacted by biomass burning. Mixing ratios of PAN and PPN were also elevated in the marine boundary layer close to the west coast of California, possibly because of photochemical production driven by maritime NOx emissions.

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