HR: 1340h
AN: A43C-0076    [Abstracts]
TI: In-Situ Measurement of $\Sigma$ANs During INTEX-NA
AU: * Perring, A E
EM: aperring@berkeley.edu
AF: Department of Chemistry, UC Berkeley, Department of Chemisty Latimer Hall, UC Berkeley , Berkeley, CA 94720-1460
AU: Cohen, R C
EM: cohen@cchem.berkeley.edu
AF: Department of Chemistry, UC Berkeley, Department of Chemisty Latimer Hall, UC Berkeley , Berkeley, CA 94720-1460
AU: Cohen, R C
EM: cohen@cchem.berkeley.edu
AF: Department of Earth and Planetary Sciences, University of California Department of Earth and Planetary Science College of Letters and Science 307 McCone Hall, Berkeley, CA 94720-4767
AU: Cohen, R C
EM: cohen@cchem.berkeley.edu
AF: Energy and Environment Technologies Division, Lawrence Berkeley National Lab, Berkeley, CA 94720
AU: Wooldridge, P J
EM: pjwool@socrates.berkeley.edu
AF: Department of Chemistry, UC Berkeley, Department of Chemisty Latimer Hall, UC Berkeley , Berkeley, CA 94720-1460
AU: Bertram, T H
EM: tbertram@berkeley.edu
AF: Department of Chemistry, UC Berkeley, Department of Chemisty Latimer Hall, UC Berkeley , Berkeley, CA 94720-1460
AB: Alkyl and multifunctional nitrates ($\Sigma$ANs), produced by reactions of peroxy radicals with NO and reactions of the NO3 radical with alkenes, have previously been observed at high mixing ratios and comprising large fractions of NOy and NOz at the surface. To date there have been no observations of $\Sigma$ANs above the surface. $\Sigma$ANs were measured in real time aboard the NASA DC8 during INTEX-NA (6/1/04-8/14/04) by Thermal Dissociation Laser Induced Fluorescence (TD-LIF). Aircraft flights during INTEX-NA included extensive characterization of the continental and marine boundary layers as well as frequent vertical profiles. Here we describe the $\Sigma$AN mixing ratios observed and show some critical comparisons to measurements of speciated nitrates reported in prior studies. Correlations between $\Sigma$ANs and other products of hydrocarbon oxidation, such as formaldehyde, are used to place constraints on alkyl nitrate yields in the boundary layer.
DE: 0300 ATMOSPHERIC COMPOSITION AND STRUCTURE
DE: 0317 Chemical kinetic and photochemical properties
DE: 0345 Pollution--urban and regional (0305)
DE: 0365 Troposphere--composition and chemistry
DE: 0368 Troposphere--constituent transport and chemistry
SC: Atmospheric Sciences [A]
MN: 2004 AGU Fall Meeting