Results from fast airborne measurements of PANs during the 2004 New England Air Quality Study

HR: 16:30h
AN: A54C-03 [Abstracts]
TI: Results from fast airborne measurements of PANs during the 2004 New England Air Quality Study
AU: * Flocke, F
EM: ffl@ucar.edu
AF: National Center for Atmospheric Research, 1850 Table Mesa Dr, Boulder, CO 80305 United States
AU: Swanson, A
EM: aswanson@ucar.edu
AF: Cooperative Institute for Research in Environmental Sciences, University of Colorado at Boulder, Boulder, CO 80305 United States
AU: Roberts, J
EM: James.M.Roberts@noaa.gov
AF: NOAA Aeronomy Laboratory, 325 Broadway, Boulder, CO 80303 United States
AU: Pfister, G
EM: pfister@ucar.edu
AF: National Center for Atmospheric Research, 1850 Table Mesa Dr, Boulder, CO 80305 United States
AU: Emmons, L
EM: emmons@ucar.edu
AF: National Center for Atmospheric Research, 1850 Table Mesa Dr, Boulder, CO 80305 United States
AU: Lamarque, J
EM: lamar@ucar.edu
AF: National Center for Atmospheric Research, 1850 Table Mesa Dr, Boulder, CO 80305 United States
AU: Hess, P
EM: hess@ucar.edu
AF: National Center for Atmospheric Research, 1850 Table Mesa Dr, Boulder, CO 80305 United States
AU: Huey, G
EM: greg.huey@eas.gatech.edu
AF: Department of Earth and Atmospheric Sciences, Georgia Institute of Technology 311 Ferst Drive, Atlanta, GA 30332 United States
AU: Tanner, D
EM: tanner@eas.gatech.edu
AF: Department of Earth and Atmospheric Sciences, Georgia Institute of Technology 311 Ferst Drive, Atlanta, GA 30332 United States
AU: Ryerson, T
EM: Thomas.B.Ryerson@noaa.gov
AF: NOAA Aeronomy Laboratory, 325 Broadway, Boulder, CO 80303 United States
AU: Newman, A
EM: Andy.Neuman@noaa.gov
AF: Cooperative Institute for Research in Environmental Sciences, University of Colorado at Boulder, Boulder, CO 80305 United States
AU: Holloway, J
EM: John.S.Holloway@noaa.gov
AF: NOAA Aeronomy Laboratory, 325 Broadway, Boulder, CO 80303 United States
AU: deGouw, J
EM: Joost.DeGouw@noaa.gov
AF: Cooperative Institute for Research in Environmental Sciences, University of Colorado at Boulder, Boulder, CO 80305 United States
AU: Warneke, C
EM: Carsten.Warneke@noaa.gov
AF: Cooperative Institute for Research in Environmental Sciences, University of Colorado at Boulder, Boulder, CO 80305 United States
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. 8 different PAN compounds were measured (6 PANs simultaneously) with a time resolution of 2 seconds by employing a Chemical Ionization Mass Spectrometer (PAN-CIGAR). The results presented here will focus on observations of PANs in biomass burning emissions from Canadian and Alaskan forest fires. Plumes from these fires were frequently observed over the Northeastern US and Southeastern Canada over the course of the experiment. The forest fire plumes generally showed PANs as the dominant NO_y component indicating efficient removal of HNO₃ from these air masses. Some of the plumes contained very large mixing ratios of PANs but relatively low ozone. Possible reasons for this will be explored and discussed. A second focus of our analysis will be the investigation of the influence of biogenic emissions on the regional photochemistry using the observed ratios of PANs in the continental outflow sampled during NEAQS.
DE: 0300 ATMOSPHERIC COMPOSITION AND STRUCTURE
DE: 0345 Pollution: urban and regional (0305, 0478, 4251)
DE: 0365 Troposphere: composition and chemistry
DE: 0394 Instruments and techniques
SC: Atmospheric Sciences [A]
MN: Fall Meeting 2005