HR: 0830h
AN: A21C-0979    [PDF]
TI: Cloud Retrieval Using the O2-O2 477 nm Absorption Band as Observed by the Ozone Monitoring Instrument
AU: Acarreta, J
AF: Royal Dutch Meteorological Institute, P.O.Box 301, De Bilt, 3730AE Netherlands
AU: De Haan, J F
EM: haandej@knmi.nl
AF: Royal Dutch Meteorological Institute, P.O.Box 301, De Bilt, 3730AE Netherlands
AU: Veefkind, J P
AF: Royal Dutch Meteorological Institute, P.O.Box 301, De Bilt, 3730AE Netherlands
AU: Stammes, P
AF: Royal Dutch Meteorological Institute, P.O.Box 301, De Bilt, 3730AE Netherlands
AU: * Brinksma, E
AF: Royal Dutch Meteorological Institute, P.O.Box 301, De Bilt, 3730AE Netherlands
AU: Levelt, P F
AF: Royal Dutch Meteorological Institute, P.O.Box 301, De Bilt, 3730AE Netherlands
AB: The Ozone Monitoring Instrument (OMI) is a nadir pointing imaging spectrometer with a wide swath (about 2600 km) that records reflected radiance spectra in the wavelength range 270-500 nm with a spectral resolution of about 0.5 nm. The high spatial resolution (13x24 km at nadir) makes it possible to obtain information on tropospheric pollution provided one can accurately account for problems associated with (partly) cloud covered pixels. OMI is scheduled for launch early 2004 as part of the NASA EOS-Aura mission. Currently operational spectrometers such as GOME and SCIAMACHY use the oxygen A band to obtain information on the effective cloud fraction and effective cloud altitude for a ground pixel. This information is essential to correct vertical column densities of trace gases for cloud contaminated pixels. As OMI does not record spectra beyond 500 nm, an alternative method has to be used to obtain information on cloud properties. A simple and robust method based on absorption by the O2-O2 collision complex at 477 nm has been developed for OMI. The method has been applied to GOME data and its results have been compared with those obtained from the O2-A band algorithm. In this poster presentation the method used will be briefly described and the comparisons with cloud information obtained form the oxygen A band will be presented.
DE: 0300 ATMOSPHERIC COMPOSITION AND STRUCTURE
DE: 0320 Cloud physics and chemistry
DE: 0360 Transmission and scattering of radiation
SC: Atmospheric Sciences [A]
MN: 2003 Fall Meeting