HR: 08:45h
AN: A41C-03    [Abstracts]
TI: Airborne Formaldehyde Measurements During INTEX-A: a Preliminary Look at Mixing Ratio Distributions Over North America
AU: * Fried, A
EM: fried@ucar.edu
AF: National Center for Atmospheric Research, 3450 Mitchell Lane, Boulder, CO 80301 United States
AU: Walega, J
EM: walega@ucar.edu
AF: National Center for Atmospheric Research, 3450 Mitchell Lane, Boulder, CO 80301 United States
AU: Heikes, B G
EM: bheikes@gso.uri.edu
AF: University of Rhode Island, Bay Campus, South Ferry Rd. , Narragansett, RI 02882 United States
AU: O'Sullivan, D W
EM: osulliva@usna.edu
AF: U.S. Naval Academy, 572 Holloway Rd., Annapolis, MD 21402 United States
AU: Shen, H
EM: bheikes@gso.uri.edu
AF: University of Rhode Island, Bay Campus, South Ferry Rd. , Narragansett, RI 02882 United States
AU: Snow, J
EM: Julie.snow@sru.edu
AF: Slippery Rock University of Pennsylvania, 308 Old Main, Slippery Rock, PA 16057 United States
AU: Roller, C
EM: croller@ucar.edu
AF: National Center for Atmospheric Research, 3450 Mitchell Lane, Boulder, CO 80301 United States
AU: Weibring, P
EM: weibring@atd.ucar.edu
AF: National Center for Atmospheric Research, 3450 Mitchell Lane, Boulder, CO 80301 United States
AB: Formaldehyde (HCHO) is a key reactive trace gas present throughout the atmosphere and is involved in a number of important atmospheric processes, including hydrocarbon oxidation, ozone production, reactive hydrogen radical formation, and generation of carbon monoxide. Because of this importance and its integral role in helping to test photochemical reaction pathways, extensive measurements of HCHO and comparisons with box models have been carried out over wide geographic regions of the globe with varying levels of agreement. Despite this importance, very little is known about the vertical transport of HCHO from source regions in the boundary layer to the upper troposphere from convective outflow. This talk will present a preliminary look at HCHO mixing ratios, acquired by two independent instruments operated onboard NASA's DC-8 aircraft during the 2004 INTEX-A study, over wide geographic source regions of North America. This presentation will specifically highlight elevated HCHO mixing ratios in the upper troposphere from convective outflow
DE: 0365 Troposphere--composition and chemistry
DE: 0368 Troposphere--constituent transport and chemistry
SC: Atmospheric Sciences [A]
MN: 2004 AGU Fall Meeting