Abstract
The aim of this contribution is to study the aerosol load in Buenos Aires in order to help characterize the contribution of distant sources and the role of the flow patterns in Southeastern South America (SESA) as dispersion mechanisms. The regional pollution in SESA is mainly due to biomass burning and the related smoke plume could be frequently observed by remote sensors from space. Observations and modeling results are combined to assess the relative importance of the biomass burning contribution to the aerosol pollution in the megacity. Buenos Aires aerosol load and derived quantities have episodic contributions from biomass burning. An increase in aerosol optical depth and Angstrom coefficient and an impact in the particle size distribution are observed. A dispersion model coupled on-line with a regional atmospheric model is able to reproduce the plume pattern and evolution and the mean aerosol load.
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