HR: 0800h
AN: A51E-0128    [Abstracts]
TI: Formaldehyde and Formic Acid Measurements using Quantum Cascade Laser based Tunable IR Absorption Spectroscopy
AU: * Shorter Herndon, J C
EM: herndon@aerodyne.com
AF: Aerodyne Research, Inc., 45 Manning Road, Billerica, MA 01821 United States
AU: Shorter, J H
EM: shorter@aerodyne.com
AF: Aerodyne Research, Inc., 45 Manning Road, Billerica, MA 01821 United States
AU: Nelson, D D
EM: ddn@aerodyne.com
AF: Aerodyne Research, Inc., 45 Manning Road, Billerica, MA 01821 United States
AU: Jimenez- Pizarro, R
EM: jimenez@fas.harvard.edu
AF: Harvard University Dept. of Earth and Planetary Sciences, 20 Oxford Street, Cambridge, MA 02138 United States
AU: Zahniser, M S
EM: mz@aerodyne.com
AF: Aerodyne Research, Inc., 45 Manning Road, Billerica, MA 01821 United States
AB: The first deployment of a dual quantum cascade laser based instrument will be discussed. Following a short discussion of the instrumental details, a preliminary analysis of the urban outflow measurements will be presented with an emphasis on understanding the observed HCHO to CO and HCHO to CH₃CHO ratios. The observed content of formic acid (HCOOH) in an aged biomass burning plume is somewhat greater than that typically measured in fresh plumes. The potential mechanisms of HCOOH production from other hydrocarbons will be discussed. The elevated levels of HCHO observed during an isoprene oxidation event will also be presented.
DE: 0365 Troposphere: composition and chemistry
DE: 0368 Troposphere: constituent transport and chemistry
DE: 0394 Instruments and techniques
SC: Atmospheric Sciences [A]
MN: Fall Meeting 2005