HR: 0800h
AN: A51D-0099    [Abstracts]
TI: Convection Signatures and the Age of Air in the Upper Troposphere
AU: Perring, A E
EM: aperring@berkeley.edu
AF: Department of Chemistry; University of California, Berkeley, Latimer Hall, Berkeley, CA 94720 United States
AU: * Bertram, T H
EM: tbertram@berkeley.edu
AF: Department of Chemistry; University of California, Berkeley, Latimer Hall, Berkeley, CA 94720 United States
AU: Wooldridge, P J
EM: pjwool@berkeley.edu
AF: Department of Chemistry; University of California, Berkeley, Latimer Hall, Berkeley, CA 94720 United States
AU: Cohen, R C
EM: rccohen@berkeley.edu
AF: Department of Chemistry; University of California, Berkeley, Latimer Hall, Berkeley, CA 94720 United States
AU: Cohen, R C
EM: rccohen@berkeley.edu
AF: Department of Earth and Planetary Science; University of California, Berkeley, McCone Hall, Berkeley, CA 94720 United States
AU: Crounse, J D
EM: crounjd@caltech.edu
AF: Division of Geological and Planetary Sciences; California Institute of Technology, 1200 East California Boulevard, Pasadena, CA 91125 United States
AU: Wennberg, P O
EM: wennberg@gps.caltech.edu
AF: Environmental Science and Engineering; California Institute of Technology, 1200 East California Boulevard, Pasadena, CA 91125 United States
AU: Wennberg, P O
EM: wennberg@gps.caltech.edu
AF: Division of Geological and Planetary Sciences; California Institute of Technology, 1200 East California Boulevard, Pasadena, CA 91125 United States
AU: Dibb, J
EM: jack.dibb@unh.edu
AF: Institute for the Study of Earth, Oceans, and Space; University of New Hampshire, 39 College Road, Durham, NH 03824 United States
AU: Scheuer, E
EM: eric.scheuer@unh.edu
AF: Institute for the Study of Earth, Oceans, and Space; University of New Hampshire, 39 College Road, Durham, NH 03824 United States
AU: Walega, J
EM: walega@ucar.edu
AF: The National Center for Atmospheric Research, 3450 Mitchell Lane, Boulder, CO 80301 United States
AU: Fried, A
EM: fried@ucar.edu
AF: The National Center for Atmospheric Research, 3450 Mitchell Lane, Boulder, CO 80301 United States
AU: Vay, S A
EM: s.a.vay@larc.nasa.gov
AF: NASA Langley Research Center, NASA Langley, Hampton, VA 23681 United States
AU: Hiekes, B
EM: bheikes@gso.uri.edu
AF: Graduate School of Oceanography; University of Rhode Island, South Ferry Road, Narragansett, RI 02882 United States
AU: Kim, S
EM: skim@eas.gatech.edu
AF: School of Earth and Atmospheric Sciences; Georgia Institute of Technology, 311 Ferst Drive, Atlanta, GA 30332 United States
AU: Huey, G
EM: greg.huey@eas.gatech.edu
AF: School of Earth and Atmospheric Sciences; Georgia Institute of Technology, 311 Ferst Drive, Atlanta, GA 30332 United States
AU: Porter, M
EM: mporter@met.fsu.edu
AF: Department of Meteorology; Florida State University, 404 Love Building, Tallahassee, FL 32306 United States
AU: Fuelberg, H
EM: fuelberg@met.fsu.edu
AF: Department of Meteorology; Florida State University, 404 Love Building, Tallahassee, FL 32306 United States
AB: Observations of Nitrogen Dioxide (NO₂) over the continental United States reveal strong signatures of convective pumping of both boundary layer and lighting NO_x to the Upper Troposphere (UT) (8-12.5km) during the summer (INTEX-NA July-August 2004). This influence may require adjustments to a priori assumptions about NO₂ profiles used in OMI or SCIAMACHY NO₂ retrievals. As expected, similar profiles during the winter (PAVE January 2005) show no signs of enhanced NO_x in the UT. Quantifying the role of convection and lightning is a long standing challenge for tropospheric chemistry. Another challenge has been to provide a clock indicating the time that air has spent in the free troposphere since convection. Following on the suggestion of Jaegle et al. [1998] that convective injection of boundary layer and lightning NO_x and concurrent precipitation scavenging of HNO₃ offers an initial condition that can be used to provide timing information, we use the ratio of NO_x/HNO₃ as an indicator of convective influence and a measure of the timing of that influence.
DE: 0365 Troposphere: composition and chemistry
DE: 0368 Troposphere: constituent transport and chemistry
SC: Atmospheric Sciences [A]
MN: Fall Meeting 2005