HR: 10:20h
AN: A42A-01    [Abstracts]
TI: A Brief Overview of INTEX-B and OVOC Observations Over Mexico City, Gulf of Mexico, and the Pacific Ocean
AU: * Singh, H B
EM: Hanwant.B.Singh@NASA.Gov
AF: NASA ARC, MS 245-5, Moffett Field, CA 94305, United States
AU: Apel, E
EM: apel@ucar.edu
AF: NCAR, ACD, Boulder, CO 80301, United States
AU: Brune, W
EM: brune@essc.psu.edu
AF: Penn State University, Dept. of Meteorology, University Park, PA 16802, United States
AU: Carmichael, G
EM: gcarmich@engineering.uiowa.edu
AF: Univ.of Iowa, CGRER, Iowa City, IA 52242, United States
AU: Cohen, R
EM: rccohen@berkeley.edu
AF: UC Berkeley, Dept. of Chemistry, Berkeley, CA 94720, United States
AU: Crawford, J
EM: James.H.Crawford@nasa.gov
AF: NASA Langley, MS 483, Hampton, VA 23681, United States
AU: Czech, E
EM: eczech@mail.arc.nasa.gov
AF: NASA ARC, MS 245-5, Moffett Field, CA 94305, United States
AU: Emmons, L
EM: emmons@ucar.edu
AF: NCAR, ACD, Boulder, CO 80301, United States
AU: Flocke, F
EM: ffl@mailserver3.acd.ucar.edu
AF: NCAR, ACD, Boulder, CO 80301, United States
AU: Fried, A
EM: fried@ucar.edu
AF: NCAR, ACD, Boulder, CO 80301, United States
AU: Fuelberg, H
EM: fuelberg@huey.met.fsu.edu
AF: Florida State University, Dept. of Meteorology, Tallahassee, FL 32306, United States
AU: Heikes, B
EM: bheikes@gso.uri.edu
AF: URI, Center for Atmospheric Chemistry Studies, Narragansett, RI 02882, United States
AU: Jacob, D
EM: djj@io.harvard.edu
AF: Harvard University, 110C Pierce Hall, Cambridge, MA 02138, United States
AU: Pierce, B
EM: brad.pierce@noaa.gov
AF: NASA Langley, MS 483, Hampton, VA 23681, United States
AB: INTEX-B/MILAGRO* was a major international atmospheric chemistry field campaign completed in the spring of 2006 (March 1-May 15). Airborne measurements of a large number of oxygenated volatile organic chemicals (OVOC) were carried out over Mexico City, Gulf of Mexico, and the Pacific Ocean using the NASA DC-8 and NSF/NCAR C-130. OVOC measurements included acetone, methylethyl ketone, methanol, ethanol, acetaldehyde, propanal, formaldehyde, organic peroxides, PANs, and organic nitrates. Complementary measurements of several tracers (CO, HCN) were also made. Throughout the troposphere mixing ratios of several OVOC were strongly correlated with each other as well as with tracers of fossil and biomass/biofuel combustion. The composition of these air masses also indicated a large shift of reactive nitrogen into the PAN reservoir during transport thereby limiting ozone formation. Several 3-D models (GEOS-Chem, MOZART, RAQMS, STEM) were used to simulate these observations with partial success. Some of these OVOC have also been retrieved from satellite observations in the upper troposphere and these data are compared. An analysis of the distribution and sources of OVOC based on INTEX-B/MILAGRO and some satellite observations will be presented. *INTEX-B: Intercontinental Chemical Transport Experiment-B; MILAGRO: Megacity Initiative: Local and Global Research Observations
DE: 0345 Pollution: urban and regional (0305, 0478, 4251)
DE: 0365 Troposphere: composition and chemistry
DE: 0368 Troposphere: constituent transport and chemistry
SC: Atmospheric Sciences [A]
MN: 2007 Fall Meeting