HR: 14:00h
AN: A43F-02 INVITED [Abstracts]
TI: Variability in Nocturnal Nitrogen Oxide Processing and its Role in Regional Air Quality
AU: * Brown, S S
EM: steven.s.brown@noaa.gov
AF: NOAA Aeronomy Lab, 325 Broadway, Boulder, CO 80305
United States
AU: Ryerson, T B
EM: thomas.b.ryerson@noaa.gov
AF: NOAA Aeronomy Lab, 325 Broadway, Boulder, CO 80305
United States
AU: Wollny, A G
EM: adam.wollny@noaa.gov
AF: NOAA Aeronomy Lab, 325 Broadway, Boulder, CO 80305
United States
AU: Wollny, A G
EM: adam.wollny@noaa.gov
AF: Cooperative Institute for Research in the Environmental Sciences, University of Colorado, Boulder, CO
80305
AU: Brock, C A
EM: charles.a.brock@noaa.gov
AF: NOAA Aeronomy Lab, 325 Broadway, Boulder, CO 80305
United States
AU: Peltier, R
EM: rpeltier@eas.gatech.edu
AF: School of Earth and Atmospheric Sciences, Georgia Insitute of Technology, Atlanta, GA 30332
United States
AU: Sullivan, A P
EM: amy.sullivan@eas.gatech.edu
AF: School of Earth and Atmospheric Sciences, Georgia Insitute of Technology, Atlanta, GA 30332
United States
AU: Weber, R J
EM: rweber@eas.gatech.edu
AF: School of Earth and Atmospheric Sciences, Georgia Insitute of Technology, Atlanta, GA 30332
United States
AU: Trainer, M K
EM: michael.k.trainer@noaa.gov
AF: NOAA Aeronomy Lab, 325 Broadway, Boulder, CO 80305
United States
AU: Meagher, J F
EM: james.f.meagher@noaa.gov
AF: NOAA Aeronomy Lab, 325 Broadway, Boulder, CO 80305
United States
AU: Fehsenfeld, F C
EM: fred.c.fehsenfeld@noaa.gov
AF: NOAA Aeronomy Lab, 325 Broadway, Boulder, CO 80305
United States
AU: Ravishankara, A R
EM: a.r.ravishankara@noaa.gov
AF: NOAA Aeronomy Lab, 325 Broadway, 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, CO 80309
United States
AB:
The nocturnal formation and subsequent reactions of NO3 (the nitrate radical) and N2O5 (dinitrogen pentoxide) are an
important component of atmospheric nitrogen oxide chemistry. These two compounds can account for a significant fraction of
NOy, regulate the conversion of NOx to nitric acid, and are responsible for the nocturnal oxidation of hydrocarbons and
sulfur compounds. The key reaction in the nocturnal conversion of NOx to nitric acid is the heterogeneous hydrolysis of
N2O5. In spite of its importance, this reaction is poorly characterized under realistic atmospheric conditions.
Measurements of NO3 and N2O5 from the P-3 have allowed for direct determination of the uptake coefficient, ?(N2O5), which
shows considerably larger variability than previous laboratory studies or model parameterizations would suggest. This
finding has implications for the impact of sulfate aerosol on regional air quality and the export of NOx to the free
troposphere.
DE: 0300 ATMOSPHERIC COMPOSITION AND STRUCTURE
DE: 0305 Aerosols and particles (0345, 4801, 4906)
DE: 0317 Chemical kinetic and photochemical properties
DE: 0322 Constituent sources and sinks
DE: 0365 Troposphere: composition and chemistry
SC: Atmospheric Sciences [A]
MN: Fall Meeting 2005