HR: 0800h
AN: A51C-0068    [Abstracts]
TI: Daytime and Nighttime Modelling of Radicals in the Lower Troposphere During the NEAQS 2004 Campaign
AU: * Sommariva, R
EM: roberto.sommariva@noaa.gov
AF: Aeronomy Laboratory, National Oceanic and Atmospheric Administration, Boulder, CO 80305 United States
AU: * Sommariva, R
EM: roberto.sommariva@noaa.gov
AF: Cooperative Institute for Research in Environmental Sciences, University of Colorado - Boulder, Boulder, CO 80309 United States
AU: Brown, S S
EM: Steven.S.Brown@noaa.gov
AF: Aeronomy Laboratory, National Oceanic and Atmospheric Administration, Boulder, CO 80305 United States
AU: Brown, S S
EM: Steven.S.Brown@noaa.gov
AF: Cooperative Institute for Research in Environmental Sciences, University of Colorado - Boulder, Boulder, CO 80309 United States
AU: Huey, G
EM: greg.huey@eas.gatech.edu
AF: School of Earth and Atmospheric Sciences, Georgia Institute of Technology, Atlanta, GA 30332 United States
AU: Osthoff, H D
EM: Hans.Osthoff@noaa.gov
AF: Aeronomy Laboratory, National Oceanic and Atmospheric Administration, Boulder, CO 80305 United States
AU: Osthoff, H D
EM: Hans.Osthoff@noaa.gov
AF: Cooperative Institute for Research in Environmental Sciences, University of Colorado - Boulder, Boulder, CO 80309 United States
AU: Ravishankara, A R
EM: A.R.Ravishankara@noaa.gov
AF: Aeronomy Laboratory, National Oceanic and Atmospheric Administration, Boulder, CO 80305 United States
AU: Ravishankara, A R
EM: A.R.Ravishankara@noaa.gov
AF: Department of Chemistry and Biochemistry, University of Colorado - Boulder, Boulder, CO 80309 United States
AU: Tanner, D
EM: tanner@eas.gatech.edu
AF: School of Earth and Atmospheric Sciences, Georgia Institute of Technology, Atlanta, GA 30332 United States
AU: Trainer, M
EM: Michael.K.Trainer@noaa.gov
AF: Aeronomy Laboratory, National Oceanic and Atmospheric Administration, Boulder, CO 80305 United States
AB: A zero-dimensional box model based on the Master Chemical Mechanism (MCMv3.1) was used to study radical chemistry under the conditions encountered during the New England Air Quality Study (NEAQS 2004) field campaign (July-August 2004). The model was constrained by measurements of CO, CH₄, NO, NO₂, O₃, SO₂, VOCs, HCHO, photolysis rates, H₂O, aerosol surface area, pressure and temperature taken during the Ronald H. Brown cruise and during the WP-3D flights. The model was used to calculate the concentrations of OH, HO₂, organic peroxy radicals (RO₂), NO₃ and N₂O₅. The model results were compared with OH and HO₂+RO₂ measurements by Chemical Ionization Mass Spectrometry and with NO₃ and N₂O₅ by Cavity Ring-Down Spectroscopy. The model was also used to study the production and destruction pathways of the modelled species and the composition of the peroxy radicals pool.
DE: 0365 Troposphere: composition and chemistry
SC: Atmospheric Sciences [A]
MN: Fall Meeting 2005