Closing the peroxy acetyl (PA) radical budget: Observations of acyl peroxy nitrates (PAN, PPN and MPAN) during BEARPEX 2009

Brian W. Lafranchi, Glenn M. Wolfe, Joel A. Thornton, Eleanor C. Browne, Kyung Eun Min, Paul J. Wooldridge, Megan McKay, Allen H. Goldstein, Jessica B. Gilman, Daniel Welsh-Bon, William C. Kuster, Joost A. Degouw, Jingqiu Mao, Zhong Chen, Xinrong Ren, William H. Brune, Ronald C. Cohen

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Scopus citations

Abstract

Acyl peroxy nitrates (APNs) are an important class of reactive nitrogen species formed as a result of photochemical processing of hydrocarbons in the presence of NOx (NOx = NO+NO2). Measurements of speciated acyl peroxy nitrates (APNs) were made from August-October 2007 on a ponderosa pine plantation in the Sierra Nevada Mountains of California during the Biosphere Effects on AeRosols and Photochemistry Experiment (BEARPEX, 2007). Observations of peroxy acetyl nitrate (PAN), peroxy methacryloyl nitrate (MPAN), peroxy propionyl nitrate (PPN) along with OH, NOx and a suite of aldehydes and ketones are used to evaluate a steady state model of APN concentrations. We find that ratios of APNs (e.g., PAN/MPAN, MPAN/PPN) are accurately predicted when temperatures exceed 15 °C. More than 70% of the VOC sources of PAN at the highest temperature are molecules other than acetaldehyde, with the largest contribution from methylvinyl ketone. Other significant sources include methacrolein, methyl glyoxal and biacetyl.

Original languageEnglish (US)
Title of host publicationAmerican Chemical Society - 237th National Meeting and Exposition, ACS 2009, Abstracts of Scientific Papers
StatePublished - Dec 1 2009
Event237th National Meeting and Exposition of the American Chemical Society, ACS 2009 - Salt Lake City, UT, United States
Duration: Mar 22 2009Mar 26 2009

Publication series

NameACS National Meeting Book of Abstracts
ISSN (Print)0065-7727

Other

Other237th National Meeting and Exposition of the American Chemical Society, ACS 2009
CountryUnited States
CitySalt Lake City, UT
Period3/22/093/26/09

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Chemical Engineering(all)

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