HR: 1340h
AN: A33A-0821    [Abstracts]
TI: Chemical and Aerosol Characteristics of Asian Outflow as Observed during INTEX-B and TRACE-P
AU: * Thornhill, L
EM: Kenneth.L.Thornhill@nasa.gov
AF: NASA Langley, MS 483 NASA Langley Research Center, Hampton, VA 23681, United States
AU: Anderson, B E
EM: Bruce.E.Anderson@nasa.gov
AF: NASA Langley, MS 483 NASA Langley Research Center, Hampton, VA 23681, United States
AU: Winstead, E L
EM: Edward.L.Winstead@nasa.gov
AF: NASA Langley, MS 483 NASA Langley Research Center, Hampton, VA 23681, United States
AU: Chen, G
EM: Gao.Chen@nasa.gov
AF: NASA Langley, MS 483 NASA Langley Research Center, Hampton, VA 23681, United States
AU: Clarke, A
EM: tclarke@soest.hawaii.edu
AF: University of Hawaii, School of Ocean and Earth Science and Technology 100 Pope Road, Honolulu, HI 96822, United States
AU: Dibb, J
EM: jack.dibb@unh.edu
AF: University of New Hampshire, Inst for the Study of Earth, Oceans, and Space 39 College Road UNH, Durham, NH 03824, United States
AU: Scheuer, E
EM: eric.scheuer@unh.edu
AF: University of New Hampshire, Inst for the Study of Earth, Oceans, and Space 39 College Road UNH, Durham, NH 03824, United States
AU: Sachse, G
EM: Glen.W.Sachse@nasa.gov
AF: NASA Langley, MS 483 NASA Langley Research Center, Hampton, VA 23681, United States
AU: Blake, D
EM: drblake@uci.edu
AF: University of California Irvine, School of Physical Sciences 570 Rowland Hall Mail Code: 2025, Irvine, CA 92697, United States
AU: Fuelberg, H
EM: fuelberg@met.fsu.edu
AF: Florida State University, Department of Meteorology - FSU 362 Love Building, Tallahassee, Fl 32306, United States
AB: The NASA Intercontinental Transport and Chemistry Experiment, phase B (INTEX-B) was conducted in the spring of 2006 to investigate the transport and transformation of gases and aerosols on transcontinental/intercontinental scales and to assess the impacts of the aged pollutants on air quality and climate. To accomplish these goals, the instrumented, North Dakota DC-8 aircraft was deployed during two separate phases to study vastly different pollution and transport phenomena. During the first 3 weeks of March, the aircraft was based in Houston and flew sorties over Mexico City and the western Gulf to examine the composition, outflow pathways, and evolution of pollution from Mexico City. The second phase took place between April 17 and May 15, and involved basing the aircraft at first Hickam AFB, Hawaii, then Anchorage, AK to examine the outflow of pollution from Asia at different points along the transport pathway. In this presentation, we analyze data from the second phase of INTEX-B to characterize the composition of Asian outflow as a function of age (e.g. C2H2/CO ratio) and vertical location (0-2, 2-4, 4-6, 6-8, and >8 km). We use airmass trajectories to identify the primary Asian continental source regions that influence atmospheric composition within the Northeast Pacific region and characterize those source regions using aerosol and gas phase tracers. In addition, we compare INTEX-B vertical profiles of trace gas and aerosol species with similar measurements recorded aboard the DC-8 just off the Asian coast during the 2001 NASA Transport and Chemistry near the Equator – Pacific (TRACE-P) experiment to evaluate changes in species concentrations/characteristics during the approximately 10-day transport period between the two regions.
DE: 0300 ATMOSPHERIC COMPOSITION AND STRUCTURE
DE: 0305 Aerosols and particles (0345, 4801, 4906)
DE: 0345 Pollution: urban and regional (0305, 0478, 4251)
DE: 0368 Troposphere: constituent transport and chemistry
SC: Atmospheric Sciences [A]
MN: 2007 Fall Meeting