HR: 0830h
AN: A51D-0716    [PDF]
TI: In-situ Measurements of NO$_{3}$ and N$_{2}$O$_{5}$ During NEAQS 2002
AU: * Aldener, M
EM: maldener@al.noaa.gov
AF: Aeronomy Laboratory, National Oceanic and Atmospheric Administration, 325 Broadway, Boulder, Co 80305 United States
AU: * Aldener, M
EM: maldener@al.noaa.gov
AF: Cooperative Institute for Research in Environmental Sciences, University of Colorado, Boulder, Co 80309 United States
AU: Brown, S
AF: Aeronomy Laboratory, National Oceanic and Atmospheric Administration, 325 Broadway, Boulder, Co 80305 United States
AU: Brown, S
AF: Cooperative Institute for Research in Environmental Sciences, University of Colorado, Boulder, Co 80309 United States
AU: Stark, H
AF: Aeronomy Laboratory, National Oceanic and Atmospheric Administration, 325 Broadway, Boulder, Co 80305 United States
AU: Stark, H
AF: Cooperative Institute for Research in Environmental Sciences, University of Colorado, Boulder, Co 80309 United States
AU: de Gouw, J
AF: Aeronomy Laboratory, National Oceanic and Atmospheric Administration, 325 Broadway, Boulder, Co 80305 United States
AU: de Gouw, J
AF: Cooperative Institute for Research in Environmental Sciences, University of Colorado, Boulder, Co 80309 United States
AU: Warneke, C
AF: Aeronomy Laboratory, National Oceanic and Atmospheric Administration, 325 Broadway, Boulder, Co 80305 United States
AU: Warneke, C
AF: Cooperative Institute for Research in Environmental Sciences, University of Colorado, Boulder, Co 80309 United States
AU: Kuster, W
AF: Aeronomy Laboratory, National Oceanic and Atmospheric Administration, 325 Broadway, Boulder, Co 80305 United States
AU: Goldan, P
AF: Aeronomy Laboratory, National Oceanic and Atmospheric Administration, 325 Broadway, Boulder, Co 80305 United States
AU: Williams, E
AF: Aeronomy Laboratory, National Oceanic and Atmospheric Administration, 325 Broadway, Boulder, Co 80305 United States
AU: Williams, E
AF: Cooperative Institute for Research in Environmental Sciences, University of Colorado, Boulder, Co 80309 United States
AU: Lerner, B
AF: Aeronomy Laboratory, National Oceanic and Atmospheric Administration, 325 Broadway, Boulder, Co 80305 United States
AU: Lerner, B
AF: Cooperative Institute for Research in Environmental Sciences, University of Colorado, Boulder, Co 80309 United States
AU: Roberts, J
AF: Aeronomy Laboratory, National Oceanic and Atmospheric Administration, 325 Broadway, Boulder, Co 80305 United States
AU: Marchewka, M
AF: Department of Chemistry, Western Michigan University, Kalamazoo, Mi 49008 United States
AU: Dibb, J
AF: Institute for the Study of Earth, Oceans, and Space, University of New Hampshire, Durham, NH 03824 United States
AU: Whitlow, S
AF: Institute for the Study of Earth, Oceans, and Space, University of New Hampshire, Durham, NH 03824 United States
AU: Vozella, M
AF: Institute for the Study of Earth, Oceans, and Space, University of New Hampshire, Durham, NH 03824 United States
AU: Jakoubek, R
AF: Aeronomy Laboratory, National Oceanic and Atmospheric Administration, 325 Broadway, Boulder, Co 80305 United States
AU: Middlebrook, A
AF: Aeronomy Laboratory, National Oceanic and Atmospheric Administration, 325 Broadway, Boulder, Co 80305 United States
AU: Quinn, P
AF: Pacific Marine Environmental Laboratory, National Oceanic and Atmospheric Administration, Seattle, Wa 98115 United States
AU: Bates, T
AF: Pacific Marine Environmental Laboratory, National Oceanic and Atmospheric Administration, Seattle, Wa 98115 United States
AU: Meagher, J F
AF: Aeronomy Laboratory, National Oceanic and Atmospheric Administration, 325 Broadway, Boulder, Co 80305 United States
AU: Fehsenfeld, F C
AF: Aeronomy Laboratory, National Oceanic and Atmospheric Administration, 325 Broadway, Boulder, Co 80305 United States
AU: Fehsenfeld, F C
AF: Cooperative Institute for Research in Environmental Sciences, University of Colorado, Boulder, Co 80309 United States
AU: Ravishankara, A
AF: Aeronomy Laboratory, National Oceanic and Atmospheric Administration, 325 Broadway, Boulder, Co 80305 United States
AU: Ravishankara, A
AF: Cooperative Institute for Research in Environmental Sciences, University of Colorado, Boulder, Co 80309 United States
AB: During the New England Air Quality Study (NEAQS) 2002 campaign, nighttime chemistry of nitrogen oxides was studied through direct, in-situ measurements of NO$_{3}$ and N$_{2}$O$_{5}$ via cavity ring-down spectroscopy. The measurements were taken off the coast of the Northeast U.S. aboard the NOAA research vessel Ronald H. Brown. The marine boundary layer is a unique environment in which to observe chemical transformations occurring in polluted air masses advected from land over the ocean. Data are available for 17 nights of observations of these two compounds; their mixing ratios varied from the instrumental detection limit of 0.5 pptv (5 s average) to maximum values of 140 pptv for NO$_{3}$ and 1.5 ppbv for N$_{2}$O$_{5}$. Respective average mixing ratios were 17 and 84 pptv during nighttime hours for these two compounds. The combination of these observations with measurements of mixing ratios of other important trace gases, aerosols properties and composition, and meteorological data allowed for detailed analysis of NO$_{3}$ and N$_{2}$O$_{5}$ lifetimes and relevant sink chemistry for these compounds. Model calculations are used to illustrate the interconversion of nitrogen oxide compounds near sunset and sunrise.
DE: 0345 Pollution--urban and regional (0305)
DE: 0365 Troposphere--composition and chemistry
DE: 0368 Troposphere--constituent transport and chemistry
DE: 0394 Instruments and techniques
SC: Atmospheric Sciences [A]
MN: 2003 Fall Meeting