HR: 0800h
AN: A51E-0138    [Abstracts]
TI: Understanding the interplay of climate with the production and transport of trace gases and aerosols across the southern hemisphere
AU: * Stein, D C
EM: dcs5v@virginia.edu
AF: University of Virginia, Dept of Environmental Sciences, University of Virginia, Clark Hall 291 McCormick Rd PO Box 400123, Charlottesville, VA 22904-4123 United States
AU: Swap, R J
EM: swapper@virginia.edu
AF: University of Virginia, Dept of Environmental Sciences, University of Virginia, Clark Hall 291 McCormick Rd PO Box 400123, Charlottesville, VA 22904-4123 United States
AU: Macko, S A
EM: sam8f@virginia.edu
AF: University of Virginia, Dept of Environmental Sciences, University of Virginia, Clark Hall 291 McCormick Rd PO Box 400123, Charlottesville, VA 22904-4123 United States
AB: Though largely overshadowed by the large industrial source regions of the northern hemisphere, southern hemispheric emissions resulting from biomass burning and mineral dust mobilization are of great importance to the global radiation balance. Global satellite imagery of carbon monoxide, tropospheric ozone, aerosols and other atmospheric constituents show this to be the case for the three to four month dry-season period of peak production during the austral winter. In addition to understanding the importance of the relatively high concentrations of these constituents, analysis of these remotely sensed global data sets show that dry-season distribution patterns change annually as a function of climate phase. This correlation is largely due to the fact that important synoptic-scale shifts in atmospheric circulation occur as a result of varying phases of the El Nino Southern Oscillation (ENSO) and the Quasi-Biennial Oscillation (QBO). Climate clearly has a direct effect on the transport of trace atmospheric constituents. It can also be shown that climate has several indirect effects on the trace gas and aerosol production processes. The aim of this work is to describe the primary and secondary linkages of climate with trace atmospheric constituents in terms of synoptic-scale circulation patterns. In addition, this work highlights the importance of understanding the radiative impact of these climate dependent variations on both the transport and the production of key atmospheric constituents.
DE: 0305 Aerosols and particles (0345, 4801, 4906)
DE: 0368 Troposphere: constituent transport and chemistry
DE: 1616 Climate variability (1635, 3305, 3309, 4215, 4513)
DE: 3364 Synoptic-scale meteorology
DE: 9305 Africa
SC: Atmospheric Sciences [A]
MN: Fall Meeting 2005