HR: 0830h
AN: A51D-0714 [PDF]
TI: PAN-Type Compounds and Photochemistry in the NEAQS Environment
AU: * Marchewka, M
EM: marchewka7@yahoo.com
AF: Western Michigan University, Wood Hall/Chem Dept, Kalamazoo, MI 49008 United States
AU: Bertman, S
EM: bertman@wmich.edu
AF: Western Michigan University, Wood Hall/Chem Dept, Kalamazoo, MI 49008 United States
AU: Roberts, J
EM: jr@al.noaa.gov
AF: NOAA Aeronomy Lab, 325 Broadway, Boulder, CO 80305 United States
AU: Williams, E
EM: eric@al.noaa.gov
AF: NOAA Aeronomy Lab, 325 Broadway, Boulder, CO 80305 United States
AU: Brown, S
EM: sbrown@al.noaa.gov
AF: NOAA Aeronomy Lab, 325 Broadway, Boulder, CO 80305 United States
AU: Stark, H
EM: hstark@al.noaa.gov
AF: NOAA Aeronomy Lab, 325 Broadway, Boulder, CO 80305 United States
AU: Aldener, M
EM: maldener@al.noaa.gov
AF: NOAA Aeronomy Lab, 325 Broadway, Boulder, CO 80305 United States
AU: Lerner, B
EM: brianlerner@colorado.edu
AF: NOAA Aeronomy Lab, 325 Broadway, Boulder, CO 80305 United States
AU: Murphy, P
EM: pcmurphy@al.noaa.gov
AF: NOAA Aeronomy Lab, 325 Broadway, Boulder, CO 80305 United States
AB:
Peroxyacyl Nitrates (PANs) were measured by capillary GC/ECD aboard the NOAA research ship, Ronald H. Brown, as part of the
2002 New England Air Quality Study (NEAQS). Peroxyacetyl nitrate (PAN), Peroxypropionyl nitrate (PPN), Peroxy-iso-butyryl
nitrate (PiBN), and Peroxymethacryloyl nitrate (MPAN) were all measured simultaneously once every 10 minutes from July 12
through August 10, 2002. Calibration of the PANs was performed via acetone photolysis (PAN) and diffusion source (PPN and
PAN) allowing for detection limits ranging between 5-10 pptv. Significant amounts of all the PANs were observed off of the
coast of New England. These values are comparable to those obtained from past terrestrial ground site measurements. PAN
mixing ratio was observed to be as high as 2.5 ppbv, while PPN and MPAN were seen to reach mixing ratios over 300 pptv. PANs
thereby represent a significant NOx source to the New England marine boundary layer. The relative amounts of the PANs
observed also indicate that the chemistry of the NEAQS sampling environment is impacted by the oxidation of both
anthropogenic and biogenic hydrocarbons. The results from this investigation possibly indicate the in-situ
production/destruction of PANs within the marine boundary layer.
DE: 0345 Pollution--urban and regional (0305)
DE: 0368 Troposphere--constituent transport and chemistry
SC: Atmospheric Sciences [A]
MN: 2003 Fall Meeting