Ozone Production from Biomass Burning in the Amazon: Preliminary WRF-Chem Simulations and Comparison

with In-Situ Data from the CO-CLAIM Experiment

M. M. Bela1, K. M. Longo2, S. R. Freitas2, P. Artaxo1

1Institute of Physics, University of São Paulo2Center for Weather Forecasting and Climate Studies

(CPTEC), National Institute for Space Research (INPE)

Objectives

Identify Ozone Production Regimes in the Amazon

Validate/Compare WRF-Chem / CCATT-BRAMS

Test Model Sensitivity to Emissions

Improve South American Air Quality Forecasting

Context Data Emissions Simulations Conclusions

Amazonian Biomass BurningGlobal biomass burning: 70% of BC SW direct radiative forcing [Chin 2002]

Amazon deforestation: 70% of Brazil’s CO2 emissions [INPA]

Context Data Emissions Simulations Conclusions

Wet Season

Burning Season

Source: Paulo Artaxo

Ozone Production and Transport

Context Data Emissions Simulations ConclusionsSource: Saulo Freitas

Nox + VOCs + H2O + T -> O3

Vertical transport by deep convectionLongitudinal transport by high-level winds

Ozone Production and Transport

Context Data Emissions Simulations Conclusions

Dry deposition of ozone (1.e-3 kg/m^2)(Accum. 2 months 00Z30SEP2002)

Source: Karla Longo

Precursors emission area

Downwind formation

and deposition

São Paulo

CO-CLAIM Experiment

Southern Amazon burning season

10-21 October 2007

Ozone measurements (1s) on 8 flights

Context Data Emissions Simulations Conclusions

Manaus

Alta Floresta

..

Ozone Data

Context Data Emissions Simulations Conclusions

Model SetupWRF-Chem 3.0.140km, 136x168, 1-23 Oct. 2007Timestep: 200s (met),

600s (chem)ICs/BCs: ECMWF (met),

idealized profile (chem)Chemistry: RACM-GOCARTRadiation: RRTM (longwave),

Goddard (shortwave)Land-Surface Model: Noah Microphysics: 5-class mixed-phaseCumulus: Grell-Devenyi ensemble

Context Data Emissions Simulations Conclusions

Emissions Data

Fire pixels from remote sensing fire products (GOES-8 WF_ABBA, INPE_AVHRR, MODIS) weighted by vegetation type burning emissions factors [Longo and Freitas, 2006].

Context Data Emissions Simulations Conclusions

CO Emissions [mol/km^2-hr]

10km

dom

ain

Fire Product (DSA, ABBA)

40km

dom

ain

Model Results

Context Data Emissions Simulations Conclusions

Future Work

Context Data Emissions Simulations Conclusions

Improve Model Initial and Boundary ConditionsLand-Surface: High-Resolution Land Data Assimilation

Chemistry: Global Model

More Future Work

Model Validation with Meteorological Data10km / 1km two-way nesting

Comparisons with CCATT-BRAMSClean Case: LBA-BARCA (November 2008)

Context Data Emissions Simulations Conclusions

Obrigada!Fulbright Commission BrazilSteven Peckham,

Georg Grell (NOAA/FSL)Rafael Mello, Rafael Stockler

Marcelo Alonso (CPTEC-INPE)Maria da Fatima Andrade, Marcio Gledson, Pedro

Pais Lopes (IAG-USP)