Relating Satellite Data to NOx Source Estimates Through Inverse Modelling : a 10-year Emission Assessment

HR: 16:45h
AN: A34B-04 [Abstracts]
TI: Relating Satellite Data to NOx Source Estimates Through Inverse Modelling : a 10-year Emission Assessment
AU: * Stavrakou, T
EM: jenny@aeronomie.be
AF: Belgian Institute for Space Aeronomy, Avenue Circulaire 3, Brussels, 1180, Belgium
AU: Muller, J
EM: jfm@aeronomie.be
AF: Belgian Institute for Space Aeronomy, Avenue Circulaire 3, Brussels, 1180, Belgium
AU: Boersma, F
EM: boersma@fas.harvard.edu
AF: Division of Engineering and Applied Sciences, Harvard University Pierce Hall, 29 Oxford St., Cambridge, MA 02155,
AU: De Smedt, I
EM: isad@aeronomie.be
AF: Belgian Institute for Space Aeronomy, Avenue Circulaire 3, Brussels, 1180, Belgium
AU: van der A, R
EM: avander@knmi.nl
AF: Royal Netherlands Meteorological Institute, Wilhelminalaan 10, De Bilt, 3732, Netherlands
AB: A one decade record (1997-2006) of tropospheric NO₂ columns retrieved by the GOME and SCIAMACHY satellite instruments is used to derive a top-down inventory for anthropogenic, pyrogenic and natural NOx emissions. This is realized by combining the satellite observations together with a chemistry-transport model and its adjoint, which enables to estimate the influence of the emission updates on the chemical lifetime of NOx by taking chemical feedbacks into account. The optimization is performed at the spatial resolution of the model, which allows to improve for the fine scale distribution, the seasonality and the interannual variability of the emissions. The long-term data record used allows inferring anthropogenic emission trends over the main industrialized regions of the Northern Hemisphere. The NOx emission changes inferred by the inversion imply changes on OH and O₃ concentrations. These changes as well as potential trends will be quantified in this paper, especially over regions bearing rapid economic changes or emission abatement strategies.
DE: 0322 Constituent sources and sinks
DE: 0325 Evolution of the atmosphere (1610, 8125)
DE: 0365 Troposphere: composition and chemistry
SC: Atmospheric Sciences [A]
MN: 2007 Fall Meeting