HR: 0830h
AN: A21A-24 [Abstracts]
TI: SCIAMACHY CO and CH4 Measurements Compared to MOPITT and TM3
AU: van den Broek, M P
EM: M.van.den.Broek@sron.nl
AF: SRON National Institute for Space Research, Sorbonnelaan 2, Utrecht, 3584 CA Netherlands
AU: Gloudemans, A M
EM: A.Gloudemans@sron.nl
AF: SRON National Institute for Space Research, Sorbonnelaan 2, Utrecht, 3584 CA Netherlands
AU: Aben, I
EM: E.A.A.Aben@sron.nl
AF: SRON National Institute for Space Research, Sorbonnelaan 2, Utrecht, 3584 CA Netherlands
AU: Schrijver, H
EM: schrijver@sron.nl
AF: SRON National Institute for Space Research, Sorbonnelaan 2, Utrecht, 3584 CA Netherlands
AU: * Maurellis, A N
EM: a.n.maurellis@sron.nl
AF: SRON National Institute for Space Research, Sorbonnelaan 2, Utrecht, 3584 CA Netherlands
AB:
The near-infrared spectra measured by SCIAMACHY in nadir mode on the ENVISAT satellite enable us to retrieve total columns
for CH4 and CO, from which global maps can be constructed. Since these trace species play an important role in air
pollution and global climate change, such a global knowledge on their distribution is a prerequisite to fully understand
their role in atmospheric chemistry and climate.
Scientific retrieval algorithms have been developed at SRON that make use of the calibration and characterization of the
near-infrared detectors, which have been performed in-house. Such a detailed characterization appeared to be necessary due to the growth of an ice layer on the IR detectors.
Despite these difficulties, there is clear evidence that SCIAMACHY is sensitive to the distribution of lower tropospheric CO
and CH4. For a few months in 2003 and 2004 CO and CH4 data from SCIAMACHY have been validated. Retrieved CH4 columns compare well with results of the TM3 atmospheric chemistry transport model. Similar model results have been compared to
total column CO. The latter species has also been compared with data from the satellite instrument MOPITT, which measures CO
in the thermal infrared.
DE: 0365 Troposphere--composition and chemistry
DE: 1640 Remote sensing
SC: Atmospheric Sciences [A]
MN: 2005 Joint Assembly