Atmos. Chem. Phys. Discuss., 11, 25099-25153, 2011
www.atmos-chem-phys-discuss.net/11/25099/2011/
doi:10.5194/acpd-11-25099-2011
© Author(s) 2011. This work is distributed
under the Creative Commons Attribution 3.0 License.
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This discussion paper has been under review for the journal Atmospheric Chemistry and Physics (ACP). Please refer to the corresponding final paper in ACP.
The influence of boreal biomass burning emissions on the distribution of tropospheric ozone over North America and the North Atlantic during 2010
M. Parrington1, P. I. Palmer1, D. K. Henze2, D. W. Tarasick3, E. J. Hyer4, R. C. Owen5, D. Helmig6, C. Clerbaux7, K. W. Bowman8, M. N. Deeter9, E. M. Barratt1, P.-F. Coheur10, D. Hurtmans10, M. George7, and J. R. Worden8
1School of GeoSciences, The University of Edinburgh, Edinburgh, UK
2Department of Mechanical Engineering, University of Colorado, Boulder, Colorado, USA
3Air Quality Research Division, Environment Canada, Downsview, Ontario, Canada
4Marine Meteorology Division, Naval Research Laboratory, Monterey, California, USA
5Department of Civil and Environmental Engineering, Michigan Technological University, Houghton, Michigan, USA
6Institute of Arctic and Alpine Research, University of Colorado, Boulder, Colorado, USA
7UPMC Univ. Paris 06; Université Versailles St.-Quentin; CNRS/INSU, LATMOS-IPSL, Paris, France
8Jet Propulsion Laboratory, California Institute of Technology, Pasadena, California, USA
9Atmospheric Chemistry Division, National Center for Atmospheric Research, Boulder, Colorado, USA
10Spectroscopie de l'Atmosphère, Service de Chimie Quantique et Photophysique, Université Libre de Bruxelles (ULB), Brussels, Belgium

Abstract. We analyse the tropospheric ozone distribution over North America and the North Atlantic to boreal biomass burning emissions during the summer of 2010 using the GEOS-Chem 3-D global tropospheric chemical transport model, and observations from in situ and satellite instruments. In comparison to observations from the PICO-NARE observatory in the Azores, ozonesondes across Canada, and the Tropospheric Emission Spectrometer (TES) and Infrared Atmospheric Sounding Instrument (IASI) satellite instruments, the model ozone distribution is shown to be in reasonable agreement with mean biases less than 10 ppbv. We use the adjoint of GEOS-Chem to show the model ozone distribution in the free troposphere over Maritime Canada is largely sensitive to NOx emissions from biomass burning sources in Central Canada, lightning sources in the central US, and anthropogenic sources in eastern US and south-eastern Canada. We also use the adjoint of GEOS-Chem to evaluate the Fire Locating And Monitoring of Burning Emissions (FLAMBE) inventory through assimilation of CO observations from the Measurements Of Pollution In The Troposphere (MOPITT) satellite instrument. The CO inversion showed that, on average the FLAMBE emissions needed to be reduced to 89 % of their original values, with scaling factors ranging from 12 % to 102 %, to fit the MOPITT observations in the boreal regions. Applying the CO scaling factors to all species emitted from boreal biomass burning sources led to a decrease of the model tropospheric distributions of CO, PAN, and NOx by as much as −20 ppbv, −50 ppbv, and −20 ppbv respectively. The impact of optimizing the biomass burning emissions was to reduce the model ozone distribution by approximately −3 ppbv (−8 %) and on average improved the agreement of the model ozone distribution compared to the observations throughout the free troposphere reducing the mean model bias from 5.5 to 4.0 ppbv for the PICO-NARE observatory, 3.0 to 0.9 ppbv for ozonesondes, 2.0 to 0.9 ppbv for TES, and 2.8 to 1.4 ppbv for IASI.

Citation: Parrington, M., Palmer, P. I., Henze, D. K., Tarasick, D. W., Hyer, E. J., Owen, R. C., Helmig, D., Clerbaux, C., Bowman, K. W., Deeter, M. N., Barratt, E. M., Coheur, P.-F., Hurtmans, D., George, M., and Worden, J. R.: The influence of boreal biomass burning emissions on the distribution of tropospheric ozone over North America and the North Atlantic during 2010, Atmos. Chem. Phys. Discuss., 11, 25099-25153, doi:10.5194/acpd-11-25099-2011, 2011.
 
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