HR: 17:00h
AN: A54C-05    [Abstracts]
TI: Inferring Ground-level Nitrogen Dioxide Concentrations From OMI
AU: * Lamsal, L
EM: lok.lamsal@fizz.phys.dal.ca
AF: Department of Physics and Atmospheric Science, Dalhousie University, James Dunn Building, Halifax, NS B3H 3J5, Canada
AU: Martin, R
EM: randall.martin@dal.ca
AF: Department of Physics and Atmospheric Science, Dalhousie University, James Dunn Building, Halifax, NS B3H 3J5, Canada
AU: Steinbacher, M
EM: Martin.Steinbacher@empa.ch
AF: Swiss Federal Laboratories for Material Testing and Research, Laboratory for Air Pollution/Environmental Technology, LA 027, Ueberlandstrasse 129, Duebendorf, CH-8600, Switzerland
AU: Celarier, E A
EM: edward.a.celarier@nasa.gov
AF: SGT Inc., 7701 Greenbelt Rd., Greenbelt, MD 20770, United States
AU: Bucsela, E
EM: eric.bucsela@gsfc.nasa.gov
AF: NASA Goddard Space Flight Center, Greenbelt, Greenbelt, MD 20771, United States
AU: Dunlea, E J
EM: dunlea@cires.colorado.edu
AF: University of Colorado at Boulder, CIRES, UCB 216, Boulder, CO 80309, United States
AU: Pinto, J
EM: Pinto.Joseph@epamail.epa.gov
AF: EPA, Research Triangle Park, NC, NC 27711, United States
AB: Surface NO₂ concentrations are strongly associated with mortality. We present an approach to infer ground- level NO₂ concentrations using tropospheric NO₂ columns from the OMI satellite instrument and NO₂ profile shapes from a global chemical transport model (GEOS-Chem). The derived surface NO₂ concentrations are compared with in situ NO₂ data from 214 monitoring sites from the AQS/NAPS networks in the United States and Canada. Laboratory and field measurements are used to develop and test a correction algorithm for interference by reactive nitrogen in the in-situ ground- based measurements. The OMI derived ground-level NO₂ data exhibit significant agreement with the corrected in situ measurements. This comparison not only demonstrates the capability of monitoring surface air quality from space but also serves as an indirect validation of the OMI tropospheric NO₂ columns.
DE: 0345 Pollution: urban and regional (0305, 0478, 4251)
DE: 0365 Troposphere: composition and chemistry
DE: 3360 Remote sensing
SC: Atmospheric Sciences [A]
MN: 2007 Fall Meeting