HR: 1340h
AN: A23C-1483    [Abstracts]
TI: Adjoint Inversion of Global NOx Emissions with SCIAMACHY NO2
AU: * Shim, C
EM: cshim@jpl.nasa.gov
AF: Jet propulsion laboratory, 4800 Oak grove dr., Pasadena, CA 91109, United States
AU: Li, Q
EM: qli@jpl.nasa.gov
AF: Jet propulsion laboratory, 4800 Oak grove dr., Pasadena, CA 91109, United States
AU: Henze, D
EM: daven@caltech.edu
AF: California Institute of Technology, 1220 E California Blvd, Pasadena, CA 91125, United States
AU: Martin, R
EM: randall.martin@dal.ca
AF: Dallhousie University, 6385 South Street, Halifax, NS B3H 1Z9, Canada
AU: Donkelaar, A V
EM: aaron.van.donkelaar@dal.ca
AF: Dallhousie University, 6385 South Street, Halifax, NS B3H 1Z9, Canada
AU: Kopacz, M
EM: kopacz@fas.harvard.edu
AF: Havard University, Pierce Hall, 29 Oxford St., Cambridge, MA 02138, United States
AU: Bowman, K W
EM: kevin.w.bowman@jpl.nasa.gov
AF: Jet propulsion laboratory, 4800 Oak grove dr., Pasadena, CA 91109, United States
AU: Eldering, A
EM: annmarie.eldering@jpl.nasa.gov
AF: Jet propulsion laboratory, 4800 Oak grove dr., Pasadena, CA 91109, United States
AB: An adjoint inversion of NOx emissions is conducted with tropospheric NO2 column measurements from SCIAMACHY to constrain NOx emissions for November 2005. The adjoint of the GEOS-Chem global 3-D model of tropospheric chemistry and transport is applied for the inversion. Vertical NO2 columns are obtained by computing AMF calculation with GEOS-Chem NO2 profiles. The November time period is chosen so that a comparison between the adjoint inversion and the mass-balance method [e.g., Martin et al., 2003] would shed light into the smearing effect due to transport associated with the later approach. Simulations were conducted at 2x2.5 horizontal resolution. NOx emissions from urban/industry, biomass burning, lightning, biofuel, soil, and NH3 oxidation are chosen as state variables. GEOS-Chem underestimates SCHIAMACHY NO2 tropospheric columns by 20-30%. A posteriori of urban/industry, biomass burning, lightning and soil NOx emissions are generally higher than the a priori values with regional variations. On the other hand, a posteriori of NH3 oxidation are generally lower than the a priori values.
DE: 0365 Troposphere: composition and chemistry
DE: 0368 Troposphere: constituent transport and chemistry
DE: 3315 Data assimilation
DE: 3360 Remote sensing
SC: Atmospheric Sciences [A]
MN: 2007 Fall Meeting