HR: 15:10h
AN: A53C-07    [Abstracts]
TI: Profile measurements and OMI NO2 retrievals: New results from validation campaigns
AU: * Bucsela, E J
EM: bucsela@ix.netcom.com
AF: GEST/UMBC, 5523 Research Park Drive, Suite 320, Baltimore, MD 21228 United States
AU: Celarier, E A
EM: celarier@jwocky.gsfc.nasa.gov
AF: SGT, Inc., 7701 Greenbelt Rd, Suite 100, Greenbelt, MD 20770 United States
AU: Gleason, J F
EM: gleason@redwind.gsfc.nasa.gov
AF: NASA Goddard Space Flight Center, Code 613.3, Greenbelt, MD 20771 United States
AU: Cohen, R C
EM: rccohen@berkeley.edu
AF: Department of Chemistry, University of California, Berkeley, Berkeley, CA 94720 United States
AU: Bertram, T H
EM: tbertram@berkeley.edu
AF: Department of Chemistry, University of California, Berkeley, Berkeley, CA 94720 United States
AU: Brinksma, E
EM: brinksma@knmi.nl
AF: Royal Dutch Meteorological Institute (KNMI), Postbus 201, AE, De Bilt, 3730 Netherlands
AU: Veefkind, P
EM: veefkind@knmi.nl
AF: Royal Dutch Meteorological Institute (KNMI), Postbus 201, AE, De Bilt, 3730 Netherlands
AU: Swart, D
EM: daan.swart@rivm.nl
AF: National Institute for Public Health and Environment (RIVM), PO Box 1, BA, Bilthoven, 3720 Netherlands
AU: Berkhout, S
EM: stijn.berkhout@rivm.nl
AF: National Institute for Public Health and Environment (RIVM), PO Box 1, BA, Bilthoven, 3720 Netherlands
AU: Martin, R V
EM: rvmartin@fizz.phys.dal.ca
AF: Department of Physics, Dalhousie University, Halifax, NS B3H 3J5 Canada
AB: The retrieval of atmospheric NO2 from Ozone Monitoring Instrument (OMI) measurements requires a variety of a priori information. In particular, accurate knowledge of the vertical distribution of relative NO2 concentrations in the troposphere is needed to compute air mass factors (AMFs) for converting observed slant column densitites to tropospheric vertical column densities. Until recently, few measurements of tropospheric NO2 vertical profiles existed, and the profiles used in the retrieval algorithm were estimated from models. New data are now available from aircraft campaigns, such as the Intercontinental Chemical Transport Experiment (INTEX-A) in 2004 and the Polar AURA Validation Experiment(PAVE) in January-February 2005. Ground-based instruments during the Dutch Aerosol and Nitrogen Dioxide Experiments for Validation of OMI and SCHIAMACHY (DANDELIONS) have provided tropospheric NO2 measurements at Cabauw, The Netherlands, during OMI overpasses in May-June 2005. Together, these new measurements can help validate total NO2 column amounts from OMI and improve the a priori profiles for the OMI NO2 algorithm. We discuss the results from the validation campaigns in light of the most recent OMI data and examine the effects of improved profile information on AMF estimates.
DE: 0300 ATMOSPHERIC COMPOSITION AND STRUCTURE
DE: 0345 Pollution: urban and regional (0305, 0478, 4251)
DE: 0365 Troposphere: composition and chemistry
DE: 0394 Instruments and techniques
SC: Atmospheric Sciences [A]
MN: Fall Meeting 2005