| Abstract | Jakarta, the capital city of Indonesia, comprised of 661.52 km2 of land area and inhabitated by approximately 8,725,630 people in 2005. Rapid industrialization, urbanization, and economic development have led to serious air pollution problem. One of the critical parameters is photochemical ozone. Status and trend of 03 were studied in relation to the local meteorological conditions using ozone monitoring data from January 2002 until March 2004 at three monitoring stations. Diurnal monthly average showed maximum value in October during the afternoon peak from 10:00 to 13:00. O3 episode of October 17 to 18 in 2003 was selected for simulation study. CAMx domain consist of two domains, the coarse and the fine domain (two way nesting). The coarse domain covered 421km x 292km with selected horizontal grid of 10.8km x 10.8km (39 x 27 cells). The nested domain covered 72km x 72km with the selected horizontal grid of 3.6km x 3.6 km (20 x 20 cells) with the southwest corner coordinate at (8 ° S, 105 ° E). MM5 was simulated on three domains (3 way nesting) using the required input data taken from National Center for Environmental Prediction (NCEP) Global Tropospheric Analysis data set. The outermost domain covered 1,166.4km x 972km with the horizontal grid of 32.4km x 32.4km (36 x 30 cells). The first inner domain covered 712.8km x 518.4km with the horizontal grid of 10.8km x 10.8km (66 x 48 cells). The innermost domain covered 129.6km x 129.6km with the horizontal grid of 3.6km x 3.6km (36 x 36 cells). The vertical structure of MM5 model consisted of 23 layers with the model top 16,000m, while CAMx model consisted of 12 layers with the top height of 76m, 310m, 800m, 1,800m, 2,500m, 3,000m, 4,700m, 6,000m, 7,600m, 9,500m, 12,000m, and 16,000m. In October episode large scale simulation, the CAMx model showed discrepancy between simulated and observed 03 values and underestimate results. The simulated maximum 03 concentration during the episode days was 110-128 ppb. The Mean Normalized Bias Error (MNBE), for this study was 19% which exceeded the criteria of ±15%. The Mean Normalized Gross Error (MNGE) value was 47% which exceeded the criteria of 35%. The Unpaired Peak Prediction Accuracy (UPA) was still within the suggested criteria which value was 20%. Thus, in the October episode, simulated MM5/CAMx model system showed moderate performance. Meteorological and emission input data needs to be improved. This thesis provides some preliminary results. Hence, the follow up researches is needed for more accurate modeling results. |