| dc.description.abstract | This study sought comparison of satellite total column Ozone data from 1985 to 2003
against ground based Dobson spectrophotometer and Ozonesonde data. The area of study
was Nairobi and the main objective was to ascertain the similarity of the three total
column ozone data sets. The inter-comparison was carried out by paring two data sets of
corresponding Julian day. The root mean square (RMS) error, bias and percentage
difference were used in order to achieve the objectives of the study. The RMS error for
Dobson/satellite was between 0% and 26%, percentage difference with Dobson as
reference ranged from -6% to 20%. Satellite/Ozonesonde and Ozonesonde/Dobson data
sets showed variable RMS error and percentage difference. Bias was positive on average
ranging between 2du to 12du in all the three data sets. Dobson/satellite results showed
small differences of RMS error, bias and percentage difference hence were comparable.
The ozonesonde data had some discrepancies partly because of vertical dynamics of
Ozone and that of the balloon carrying Ozone sensors. | en |
