DIURNAL VARIABILITY OF TOTAL OZONE, NITROGEN DIOXIDE AND SULFURDIOXIDE COLUMNS OVER BANDUNG, INDONESIA (6.9 S, 107.583 E)

Atmospheric ozone plays important role in preserving living things on Earth from harmful solar ultraviolet radiation. Atmospheric nitrogen dioxide (NO2) and sulfur dioxide (SO2) act as very important substances as precursor and destructor of atmospheric ozone. Knowing the importance of these substances therefore LAPAN has conducted observations of total ozone, NO2 and SO2 columns in Bandung since 2007 using brewer spectrophotometer. Bandung is an urban area and a capital city of West Java province where rapid development of trading, tourism and industrial activities has declined its air quality. Diurnal variability of total ozone column showed its minimum around 11:00 AM while total SO2 columns showed relatively stable pattern from early morning to roughly 14:24 PM and then slightly increase to reach its maximum at around 13:00 PM followed by slightly decrease again after. On the contrary, diurnal mean of total NO2 column values showed relatively stable values over the whole days. Daily trend of total ozone column showed a decrease values while total SO2 column showed an increase values. On the other hand daily trend of total NO2 column showed relatively stable values over the whole year