Séminaire vendredi 25 nov 13h30 / Seminar Friday Nov 25th 13h30 

Conférencier/Lecturer: Michael Buchwitz et al.,
                       Institute of Environmental Physics, University of Bremen, Bremen, Germany

        Sujet/Subject: SCIAMACHY on ENVISAT: Measurements of carbon gases and selected highlights from the first 3.5 years in orbit
		       Presentation: Anglais / English
            Lieu/Room: Grande salle du premier étage CMC 

                 iweb: http://iweb.cmc.ec.gc.ca/rpn/SEM 
                  web: http://collaboration.cmc.ec.gc.ca/science/rpn/SEM/index.php

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                                 RESUME / ABSTRACT 


SCIAMACHY is a spectrometer onboard the European satellite ENVISAT that 
observes the Earth atmosphere in nadir, limb and solar and lunar 
occultation viewing geometries in the UV-/visible/near-infrared 
(240-2400 nm) spectral region. A large number of (mainly) atmospheric 
data products can be derived from the SCIAMACHY spectra.
An overview will be given about the SCIAMACHY instrument and the data 
products that have been retrieved from SCIAMACHY so far.
Focus will be on vertical columns of three important "carbon gases" 
retrieved from the near-infrared nadir observations, namely CO2, CH4, 
and CO, including an initial comparison of the retrieved CO columns with

MOPITT. In the second part of the talk a short overview will be given 
about several of the other data products that have been obtained from 
SCIAMACHYs nadir, limb and occultation measurements in the UV/visible 
spectral region including the gases ozone, NO2, BrO, SO2, OClO, NO3, 
H2O, and several metals but also clouds (PSCs, NLCs, cloud top height 
and cloud phase index), solar activity, and marine 
phytoplankton/chlorophyll.