HR: 0830h
AN: A51D-0711    [PDF]
TI: Nonmethane Hydrocarbon and Alkyl Nitrate Distributions at a Rural Site in New Hampshire
AU: * Russo, R S
EM: rrusso@resolution.sr.unh.edu
AF: Climate Change Research Center Institute for the Study of Earth, Oceans, and Space, University of New Hampshire, Durham, NH 03824 United States
AU: Sive, B C
EM: bcs@gust.sr.unh.edu
AF: Climate Change Research Center Institute for the Study of Earth, Oceans, and Space, University of New Hampshire, Durham, NH 03824 United States
AU: Zhou, Y
EM: yzhou@ccrc.sr.unh.edu
AF: Climate Change Research Center Institute for the Study of Earth, Oceans, and Space, University of New Hampshire, Durham, NH 03824 United States
AU: Talbot, R W
EM: robert.talbot@unh.edu
AF: Climate Change Research Center Institute for the Study of Earth, Oceans, and Space, University of New Hampshire, Durham, NH 03824 United States
AB: Measurements of C$_{2}$-C$_{8}$ nonmethane hydrocarbons (NMHCs) and C$_{1}$-C$_{5}$ alkyl nitrates were made at Thompson Farm in Durham, New Hampshire as part of the Atmospheric Investigation, Regional Modeling, Analysis, and Prediction (AIRMAP) program. Distributions of NMHCs and alkyl nitrates, as well as their evolution, are analyzed to identify pollution events and their sources. The dominant NMHCs throughout the summer were ethane, propane, and isoprene while ethene, ethyne, and the C$_{4}$ and C$_{5}$ alkanes also made significant contributions to the total NMHC levels observed. The most abundant alkyl nitrates were isopropyl nitrate and 2-butyl nitrate, suggesting anthropogenic sources. Alkyl nitrate/parent alkane versus 2-butyl nitrate/n-butane ratios were used to examine the aging, production, and sources of alkyl nitrates. NMHCs, total RONO$_{2}$, and O$_{3}$ tracked each other well during pollution events for the June-August 2002 sampling period. The concurrent enhancements in RONO$_{2}$ and O$_{3}$ during the events suggests that the air masses were composed of photochemically aged anthropogenic emissions.
DE: 0345 Pollution--urban and regional (0305)
DE: 0365 Troposphere--composition and chemistry
DE: 0368 Troposphere--constituent transport and chemistry
SC: Atmospheric Sciences [A]
MN: 2003 Fall Meeting