IUAPPA Sao Paulo1 Air Quality Modeling at Santiago, Chile: Impact of Transportation Sources Héctor Jorquera Chemical and Bioprocess Engineering Catholic.

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Presentation transcript:

IUAPPA Sao Paulo1 Air Quality Modeling at Santiago, Chile: Impact of Transportation Sources Héctor Jorquera Chemical and Bioprocess Engineering Catholic University of Chile

IUAPPA Sao Paulo2 Acknowledgements n Funding from National Commision for the Environment (CONAMA). n CONAMA staff: M. Fernández, P. Oyola, J. García n PUC Staff and students: L. Cifuentes, J. Castro, R. Bown, J. Weissbluth, C. Gacitúa, A. Mitnik, and many others... n CENMA Staff: J.Escobar, A. Cabello n Swedish staff: L. Gidhagen, P. Ivarsson

IUAPPA Sao Paulo3 Santiago then… and in winter 1991

IUAPPA Sao Paulo4 Modelling framework: CAMx (available at n Simulate atmospheric processes: –wind advection –turbulent dispersion (mostly vertical) –chemical reactions (gas and PM phase) –PM generation and decay –deposition processes (dry and wet) n Dynamic emissions: mobile sources stationary sources area sources This is the major source of uncertainty in the model output results!

IUAPPA Sao Paulo5 Emissions for Santiago (2000) PollutantEmission (ton/yr)% from Transportation CO 303, NOx 81, SOx 9, COV 93, PM10 5,800 70

IUAPPA Sao Paulo6 Modelling Domain Grid settings: 60 E-W, 40 N-S 2 x 2 km cells 8 vertical levels, up to 3 km a.g.l. Origin: 270 km (E), 6250 km (N) Grid settings: 60 E-W, 40 N-S 2 x 2 km cells 8 vertical levels, up to 3 km a.g.l. Origin: 270 km (E), 6250 km (N)

IUAPPA Sao Paulo7 Complex Topography:

IUAPPA Sao Paulo8 Emissions at 8 am: CO

IUAPPA Sao Paulo9 Emissions at 8 am: NOx

IUAPPA Sao Paulo10 Model Evaluation: only within city boundaries...

IUAPPA Sao Paulo11 Case study: episode of May 1998

IUAPPA Sao Paulo12 CO impacts, F, May 1998

IUAPPA Sao Paulo13 CO impacts, M, May 1998

IUAPPA Sao Paulo14 CO impacts, N, May 1998

IUAPPA Sao Paulo15 NOx impacts, F, May 1998

IUAPPA Sao Paulo16 NOx impacts, L, May 1998

IUAPPA Sao Paulo17 NOx impacts, O, May 1998

IUAPPA Sao Paulo18 O3 impacts, B, May 1998

IUAPPA Sao Paulo19 O3 impacts, M, May 1998

IUAPPA Sao Paulo20 Conclusions n A model for AQ impacts is operative for the greater Santiago metro area n Mobile source impacts properly simulated by the model (CO, NOx) n Features of the photochemistry are well described by the model simulations n Eastern side of Santiago is facing the highest photochemical impacts n EDB for mobile sources seems fine, but needs further refinements

IUAPPA Sao Paulo21 Future work n Include PM 2.5 in CAMx simulations n Running another model with the same basic inputs (emissions+meteorology). n Improve the emission database with: –biogenic emissions –improved estimates of VOC emissions from stationary sources –better estimates of activity levels (time, space) for transportation sources n Produce a base case, ‘synthetic year’