HR: 0800h
AN: A41A-0021    [Abstracts]
TI: Nitrogen Dioxide (NO₂) Total and Tropospheric Vertical Column Densities from OMI on EOS Aura
AU: * Gleason, J F
EM: james.f.gleason@nasa.gov
AF: Goddard Space Flight Center, Mail Code 613.3, Greenbelt, MD 20771
AU: Bucsela, E
EM: bucsela@redwind.gsfc.nasa.gov
AF: UMBC, GSFC Mail Code 613.2, Greenbelt, MD 20771
AU: Celarier, E
EM: celarier@redwind,gsfc.nasa.gov
AF: SGT, GSFC Mail Code 613.2, Greenbelt, MD 20771
AU: Wenig, M
EM: wenig@redwind.gsfc.nasa.gov
AF: Goddard Space Flight Center, Mail Code 613.3, Greenbelt, MD 20771
AU: veefkind, J P
EM: veefkind@knmi.nl
AF: KNMI, P.O.Box 201, De Bilt, NL-3730 AE Netherlands
AU: Boersma, K F
EM: boersma@knmi.nl
AF: KNMI, P.O.Box 201, De Bilt, NL-3730 AE Netherlands
AU: Brinksma, E
EM: brinksma@knmi.nl
AF: KNMI, P.O.Box 201, De Bilt, NL-3730 AE Netherlands
AB: NO₂ is a trace gas, important in the chemistry of the stratosphere and troposphere. The Ozone Monitoring Instrument (OMI), which is on the EOS AURA satellite, retrieves vertical column densities (VCDs) of NO₂, along with those of several other trace gases. The relatively high spatial resolution and daily global coverage of the instrument make it particularly well-suited to monitoring tropospheric pollution at scales on the order of 20 km. The OMI NO₂ algorithm distinguishes polluted regions from background stratospheric NO₂ using a separation algorithm that relies on the smoothly varying stratospheric NO₂ and estimations of both stratospheric and tropospheric air mass factors (AMFs). The AMFs are calculated from a simplified set of profiles derived from GSFC CTM and Harvard GEOS-CHEM model output. We present total and tropospheric vertical column densities of NO₂ from several days of OMI data and discuss the effects of algorithm assumptions on the retrieved VCD values and their uncertainties.
DE: 0345 Pollution: urban and regional (0305, 0478, 4251)
DE: 0365 Troposphere: composition and chemistry
DE: 0368 Troposphere: constituent transport and chemistry
SC: Atmospheric Sciences [A]
MN: Fall Meeting 2005