HR: 0830h
AN: A21A-08    [Abstracts]
TI: Space-Based Constraints on North American Emissions of Nitrogen Oxides
AU: * Chance, K
EM: kchance@cfa.harvard.edu
AF: Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138 United States
AU: Martin, R V
EM: rvmartin@fizz.phys.dal.ca
AF: Dalhousie University, Department of Physics and Atmospheric Science, Halifax, NS B3H 3J5 Canada
AU: Sioris, C E
EM: csioris@cfa.harvard.edu
AF: Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138 United States
AB: Global emission inventories of nitrogen oxides (NOx) remain uncertain to a factor of 2 with substantial implications for understanding of surface air quality, atmospheric oxidation, and climate. We will discuss recent progress in improving NOx emission inventories by combining traditional bottom-up inventories with top-down constraints from the GOME and SCIAMACHY satellite instruments. This integration results in an optimized surface NOx emission inventory with lower uncertainties. Additionally, comparisons with in-situ NO2 profile measurements during the ICARTT campaign (summer 2004) will be shown to establish the validity and quantify the accuracy of the SCIAMACHY tropospheric NO2 column abundances.
DE: 0345 Pollution--urban and regional (0305)
DE: 0365 Troposphere--composition and chemistry
SC: Atmospheric Sciences [A]
MN: 2005 Joint Assembly