HR: 1340h
AN: A13C-0932    [Abstracts]
TI: Characterization of a CIMS Method for PAN Measurements During NEAQS/ICARTT 2004 and two Ground Campaigns
AU: * Aaron, S
EM: Aaron.Swanson@ngc.com
AF: Cooperative Institute for Research in the Environmental Sciences University of Colorado, RAL7 325 Broadway, Boulder, CO 83035 United States
AU: Flocke, F M
EM: ffl@ucar.edu
AF: Atmospheric Chemistry Division National Center for Atmospheric Research, P.O. Box 3000, Boulder, CO 80307 United States
AU: Roberts, J M
EM: James.M.Roberts@noaa.gov
AF: NOAA Aeronomy Lab, RAL7 325 Broadway, Boulder, CO 80305 United States
AU: Huey, G
EM: greg.huey@eas.gatech.edu
AF: 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: Earth and Atmospheric Sciences Georgia Institute of Technology, 311 Ferst Drive, Atlanta, GA 30332 United States
AU: Brown, S
EM: sbrown@al.noaa.gov
AF: Cooperative Institute for Research in the Environmental Sciences University of Colorado, RAL7 325 Broadway, Boulder, CO 83035 United States
AU: Brown, S
EM: sbrown@al.noaa.gov
AF: NOAA Aeronomy Lab, RAL7 325 Broadway, Boulder, CO 80305 United States
AU: Osthoff, H
EM: hostoff@al.noaa.gov
AF: Cooperative Institute for Research in the Environmental Sciences University of Colorado, RAL7 325 Broadway, Boulder, CO 83035 United States
AU: Ryerson, T
EM: Thomas.B.Ryerson@noaa.gov
AF: NOAA Aeronomy Lab, RAL7 325 Broadway, Boulder, CO 80305 United States
AU: Neuman, A
EM: andy.neuman@noaa.gov
AF: Cooperative Institute for Research in the Environmental Sciences University of Colorado, RAL7 325 Broadway, Boulder, CO 83035 United States
AU: Neuman, A
EM: andy.neuman@noaa.gov
AF: NOAA Aeronomy Lab, RAL7 325 Broadway, Boulder, CO 80305 United States
AB: A Thermal Decomposition Chemical Ionization Mass Spectrometry (CIMS) method for the measurement of Peroxy Acetyl Nitrates has been developed and refined over the past several years. Laboratory studies have determined the chemical ionization method sensitivity to a variety of PAN compounds and defined the influence played by water on the kinetics of the chemical ionization and its dependence on PAN analog structure. This work presents further characterization of the instrument during the 2004 NEAQS-ICARTT field project, as well as during two ground studies. For ICARTT the instrument was optimized for operation onboard the NOAA P-3B aircraft, where water concentrations and altitude strongly influenced instrument performance. During the winter ground study the CIMS capability to measuring the sum of N2O5 + NO3 was characterized through a comparison with the NOAA CARDS instrument. Whereas, during the summer ground study the instrument was characterized against several other instruments for PAN analysis during the PAN intercomparison experiment. This poster will highlight the field operation of the PAN-CIMS and characterize the strengths and shortcomings of the method.
DE: 0345 Pollution: urban and regional (0305, 0478, 4251)
DE: 0365 Troposphere: composition and chemistry
DE: 0368 Troposphere: constituent transport and chemistry
SC: Atmospheric Sciences [A]
MN: Fall Meeting 2005