HR: 16:00h
AN: A14A-01    [Abstracts]
TI: Fast time resolution airborne measurements of PANs during the New England Air Quality Study 2004 intensive
AU: * Flocke, F
EM: ffl@ucar.edu
AF: National Center for Atmospheric Research, 1850 Table Mesa Drive, Boulder, CO 80305
AU: Swanson, A
AF: Coorperative Institute for Research in Environmental Science, University of Colorado, Boulder, CO 80301
AU: Roberts, J
AF: NOAA Aeronomy Laboratory, 325 Broadway, Boulder, CO 80303
AU: Huey, G
AF: Georgia Institute of Technology, 311 Ferst Drive, Atlanta, GA 30332
AU: Tanner, D
AF: Georgia Institute of Technology, 311 Ferst Drive, Atlanta, GA 30332
AU: Ryerson, T
AF: NOAA Aeronomy Laboratory, 325 Broadway, Boulder, CO 80303
AU: Neuman, A
AF: Coorperative Institute for Research in Environmental Science, University of Colorado, Boulder, CO 80301
AU: Holloway, J
AF: NOAA Aeronomy Laboratory, 325 Broadway, Boulder, CO 80303
AU: deGouw, J
AF: Coorperative Institute for Research in Environmental Science, University of Colorado, Boulder, CO 80301
AU: Warneke, C
AF: Coorperative Institute for Research in Environmental Science, University of Colorado, Boulder, CO 80301
AU: Atlas, E
AF: Rosenstiel School of Marine & Atmospheric Science, University of Miami 4600 Rickenbacker Causeway, Miami, FL 33149
AU: Donnelly, S
AF: National Center for Atmospheric Research, 1850 Table Mesa Drive, Boulder, CO 80305
AU: Schauffler, S
AF: National Center for Atmospheric Research, 1850 Table Mesa Drive, Boulder, CO 80305
AU: Stroud, V
AF: National Center for Atmospheric Research, 1850 Table Mesa Drive, Boulder, CO 80305
AU: Trainer, M
AF: NOAA Aeronomy Laboratory, 325 Broadway, Boulder, CO 80303
AB: Measurements of PAN and a series of its homologues were made on board the NOAA P-3 aircraft during the New England Air Quality Study (NEAQS) as part of the 2004 ICARTT field intensive. 6 different PAN compounds were measured simultaneously with a time resolution of 2 seconds by employing a Chemical Ionization Mass Spectrometer which was flown on board an aircraft for the first time. Previous methods to measure single PAN species typically had time resolutions between 2 and 5 minutes per sample. Results will be presented from semi-Langrangian studies of the New York City and Boston plumes as they move over New England and the Atlantic Ocean as well as from a nighttime study of these urban plumes. We will demonstrate the capabilities of the new instrument using these results. Emphasis will be placed on the distribution and relative amounts of different PAN species formed in air masses influenced by different sources of VOC as well as on the contribution of PANs to the total amount of reactive nitrogen during the day and at night. The New York City and Boston plumes at times showed considerable influence of biogenic VOCs as indicated by high PAN/ PPN ratios in these air masses. Lower PAN/PPN ratios were observed in pollution encountered over the Gulf of Maine, consistent with simultaneous measurements carried out on board the NOAA RV Ronald H. Brown. Our measurements also imply the existence of several other PAN species which previously have not been measured or extensively studied in the atmosphere.
DE: 0300 ATMOSPHERIC COMPOSITION AND STRUCTURE
DE: 0317 Chemical kinetic and photochemical properties
DE: 0322 Constituent sources and sinks
DE: 0325 Evolution of the atmosphere
SC: Atmospheric Sciences [A]
MN: 2004 AGU Fall Meeting