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OZONE MEASUREMENTS IN AMAZONIA BY AIRCRAFT AND SATELLITE DCP's 
V.W J.H. Kirchhoff 
Instituto Nacional de Pesquisas Espaciais - INPE 
Divisio de Geofísica Espacial - DGE 
P.O.Box 515 
12201-970 - Säo José dos Campos, SP, Brazil 
ISPRS Commission VII 
ABSTRACT 
Ozone measurements have been made in Amazonia on several occasions and using different observation 
techniques. This paper describes a set of data taken on several aircraft flights in the Brazilian Cerrado 
region together with observations made at three Data Collecting Platforms (DCP) which measure ozone 
concentrations three times daily on average. This data set is therefore a merge of space and time 
observations of ozone, and the objective is to show the concentration differences over the biomass 
burning region of central Brazil. Diurnal variations are taken into account for observations made at 
different times of the day, and ozone sounding are used to account for height gradients. The data is 
therefore "corrected" for a given height, in this present case for 1500 feet (450 m) which is normally the 
first flight level of the INPE Bandeirante above ground. Ozone concentrations vary from as little as 20 
ppbv (parts per billion per volume) away from source areas, to as much as 140 ppbv in areas influenced 
by biomass burning sources. The results are shown in a three dimensional longitude-latitude-ozone 
concentration surface. 
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