Signature Of Tropospheric Ozone From Ftir Observations Over Tropical Africa

The tropospheric column ozone derived from 236 measurement spectra under the conditionrnof clear sky from May 2009 to Dec 2015 is analyzed. The main objective of this thesisrnis to show the high variability of tropospheric ozone over tropical Africa. For each day,rnozone columns are retrieved from individual spectral measurements using PROFFIT codernin the four micro windows. The tropospheric ozone obtained from the satellite is therndi erence between the total column of the ozone monitoring instrument/Aura with thernstratospheric column obtained from microwave limb soundert/Aura. The minimum andrnmaximum observations of tropospheric column ozone are in May 22, 2009 and January 17,rn2011 respectively. In general, elevated ozone have been recorded during spring and duringrnsummer. A closer look at the spring and the summer seasons show variations among thernyears. The maximum ozone column amount and volume mixing ratio are recorded inrnMarch 2013, 8:5 1017molecule=cm2 and 60 ppbv respectively

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