HR: 0800h
AN: A51C-0067    [Abstracts]
TI: Nighttime Oxidation of VOCs at Appledore Island, ME During ICARTT 2004
AU: * Ambrose, J L
EM: jambrose@cisunix.unh.edu
AF: Climate Change Research Center, Institute for the Study of Earth, Oceans and Space, University of New Hampshire, Morse Hall, Durham, NH 03824 United States
AU: * Ambrose, J L
EM: jambrose@cisunix.unh.edu
AF: Department of Chemistry, University of New Hampshire, Parsons Hall, Durham, NH 03824 United States
AU: Mayne, H R
EM:
AF: Climate Change Research Center, Institute for the Study of Earth, Oceans and Space, University of New Hampshire, Morse Hall, Durham, NH 03824 United States
AU: Mayne, H R
EM:
AF: Department of Chemistry, University of New Hampshire, Parsons Hall, Durham, NH 03824 United States
AU: Stutz, J
EM:
AF: Department of Atmospheric Sciences, University of California, Los Angeles, 7127 Math Sciences, Los Angeles, CA 90095-1565 United States
AU: Russo, R S
EM:
AF: Climate Change Research Center, Institute for the Study of Earth, Oceans and Space, University of New Hampshire, Morse Hall, Durham, NH 03824 United States
AU: Zhou, Y
EM:
AF: Climate Change Research Center, Institute for the Study of Earth, Oceans and Space, University of New Hampshire, Morse Hall, Durham, NH 03824 United States
AU: Varner, R K
EM:
AF: Climate Change Research Center, Institute for the Study of Earth, Oceans and Space, University of New Hampshire, Morse Hall, Durham, NH 03824 United States
AU: Nielsen, L C
EM:
AF: Climate Change Research Center, Institute for the Study of Earth, Oceans and Space, University of New Hampshire, Morse Hall, Durham, NH 03824 United States
AU: Nielsen, L C
EM:
AF: Department of Chemistry, University of New Hampshire, Parsons Hall, Durham, NH 03824 United States
AU: White, M
EM:
AF: Climate Change Research Center, Institute for the Study of Earth, Oceans and Space, University of New Hampshire, Morse Hall, Durham, NH 03824 United States
AU: Wingenter, O W
EM:
AF: Department of Chemistry, New Mexico Institute of Mining and Technology, Socorro, NM 87801 United States
AU: Haase, K
EM:
AF: Climate Change Research Center, Institute for the Study of Earth, Oceans and Space, University of New Hampshire, Morse Hall, Durham, NH 03824 United States
AU: Haase, K
EM:
AF: Department of Chemistry, New Mexico Institute of Mining and Technology, Socorro, NM 87801 United States
AU: Talbot, R W
EM:
AF: Climate Change Research Center, Institute for the Study of Earth, Oceans and Space, University of New Hampshire, Morse Hall, Durham, NH 03824 United States
AU: Sive, B C
EM:
AF: Climate Change Research Center, Institute for the Study of Earth, Oceans and Space, University of New Hampshire, Morse Hall, Durham, NH 03824 United States
AB: Ambient mixing ratios of trace gases important to nighttime chemistry of nitrate radical (NO₃) were measured at Appledore Island, ME, USA from July 8 - August 15, 2004 as part of the International Consortium for Atmospheric Research on Transport and Transformation (ICARTT) campaign. These measurements were used to investigate the nighttime oxidation of volatile organic compounds (VOCs) and nitric oxide (NO) at Appledore Island during the campaign, utilizing ambient temperature and pressure measurements along with rate data for reactions that directly remove NO₃ from the atmosphere. Additionally, ambient concentrations of dinitrogen pentoxide (N₂O₅) were estimated for the nighttime hours from the measured concentrations of nitrogen dioxide (NO₂) and NO₃ and the corresponding equilibrium constant. The estimated N₂O₅ concentrations and measurements of aerosol chemistry and size distribution were used to evaluate the importance of heterogeneous N₂O₅ hydrolysis to the overall nighttime removal of nitrogen oxides (NO_x, = NO + NO₂) relative to the gas-phase reactions of NO₃ with VOCs.
DE: 0322 Constituent sources and sinks
SC: Atmospheric Sciences [A]
MN: Fall Meeting 2005