During the Dry Season (July-September) of 2007 aerosol profiling campaign was carried with an aerosol backscattering
LIDAR system in Sao Paulo, Brazil. The main goal of this campaign was to observe the aerosol load in
the lower troposphere (up to 10 km) and its daily behavior in order to check for air dispersion conditions, planetary
boundary and mixed layer daily evolution, mid and long range transport. For the latter we used air mass
trajectory analysis and satellite data. With the LIDAR analysis we can provide the aerosol optical properties in
the visible range (532 nm) and quantities such as aerosol backscattering and extinction coefficients. Altogether
we could measure during 60 days, since when there was the presence of precipitation no measurement was conducted.
Collocated with the LIDAR was a AERONET Sunphotometer which help in characterizing the aerosol
optical properties. Our data was correlated with the Environmental Air using Optical Sensors in the Remote
Air Quality Assessment and cross-correlations were made with Aerosol Optical Thickness, Planetary Boundary
Layer evolution and Air Quality Index.
A lidar system has been operational at Sao Paulo, Brazil (23° S, 46° W) since 2001 and colocated is a sunphotometer
belonging to AERONET . During this last years aerosol properties has been extracted from both
systems and seasonal trends have been observed specially when long range transport takes place bringing plumes
with biomass burning aerosol which can distinctively be extracted from a heavy loaded atmosphere as São Paulo.
These events trigger poor air quality conditions which can be easily correlated. The parameters for studying
these patterns are Aerosol Optical Depth, Angström Exponent and Lidar Ratio. We show here some case studies
belonging to years 2003, 2004 and 2005.
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