HR: 09:07h
AN: A11C-05 INVITED     [Abstracts]
TI: Air-Sea Fluxes and Atmospheric Concentrations of Short-Lived Halogenated Gases
AU: * Butler, J H
EM: james.h.butler@noaa.gov
AF: NOAA Climate Monitoring and Diagnostics Laboratory, 325 Broadway, Boulder, CO 80305 United States
AU: King, D B
EM: daniel.king@drexel.edu
AF: Cooperative Institute for Research in Environmental Sciences, University of Colorado, Boulder, CO 80309 United States
AU: King, D B
EM: daniel.king@drexel.edu
AF: Department of Chemistry, Drexel University, Philadelphia, PA 19104 United States
AU: Yvon-Lewis, S A
EM: syvon-lewis@ocean.tamu.edu
AF: Department of Oceanography, Texas A&M University, College Station, TX 77843 United States
AU: Montzka, S A
EM: stephen.a.montzka@noaa.gov
AF: NOAA Climate Monitoring and Diagnostics Laboratory, 325 Broadway, Boulder, CO 80305 United States
AU: Hall, B D
EM: bradley.hall@noaa.gov
AF: NOAA Climate Monitoring and Diagnostics Laboratory, 325 Broadway, Boulder, CO 80305 United States
AB: The ocean is a substantial contributor of short-lived (Tau < 6 months), halogenated gases in the lower atmosphere. Supersaturations for these gases in ocean surface waters range from tens to thousands of percent, representing very high sea to air fluxes. Sources for halogenated gases can be found both in the surface layer and at depth. In addition to reacting with light, OH, and other species in the boundary layer, many of these gases or their primary reaction products are also soluble in water, which further shortens their atmospheric lifetimes through washout. Halogenated gases typically are involved in tropospheric reactions that influence atmospheric concentrations of ozone, hydrocarbons, aerosols, and other species of significance. The recent, enhanced interest in the contribution of short-lived halogenated gases not only to tropospheric chemistry, but also to stratospheric ozone depletion, underscores their potential wide-ranging contribution to the chemistry of the atmosphere. In this presentation, we evaluate our data from seven globally distributed cruises over 10 years, comparing them to studies of other investigators, to assess what is currently understood about the amounts of these gases in the marine boundary layer, their fluxes from the ocean surface, and the spatial and temporal distributions of their concentrations and fluxes. Areas of critical need are identified and discussed in light of current, available information.
UR: http://www.cmdl.noaa.gov
DE: 0300 ATMOSPHERIC COMPOSITION AND STRUCTURE
DE: 0322 Constituent sources and sinks
DE: 0330 Geochemical cycles (1030)
DE: 0365 Troposphere: composition and chemistry
DE: 4820 Gases
SC: Atmospheric Sciences [A]
MN: Fall Meeting 2005