Since 1984, Brewer spectrophotometer #16 has measured the ozone column at Uccle near Brussels in Belgium (50º48'N, 4º21'E, 100m) from the direct sun observations at five isolated wavelengths in the UV-B: 306.3nm, 310.1nm, 313.5nm, 316.7nm and 320.1nm. Previous study [Cheymol and De Backer, 2003] developed at Uccle method to retrieve the aerosol optical depth (AOD) from these observations in the UV-B. Now at Uccle, we can use this method to infer the AOD over all our datasets in fact from 1984 up to now. The Brewer instrument #16 covers the region 290-325 to measure also the global UV radiation several times per day. As the UV dome was installed on the Brewer instrument #16 in 1989, this study covers the period 1989 until now.