In the Climate Observations division we study the global and regional
atmospheric composition using satellite observations of trace gases, aerosols
and clouds. The observations contribute to monitoring and research of Climate,
Ozone, and Air Quality. The main satellite instruments used in our division are
OMI, GOME, GOME2, SCIAMACHY and SEVIRI. We develop calibration and retrieval
algorithms for these instruments, and process and distribute the satellite data
to users, e.g. via TEMIS, in collaboration with international partners. To
validate the satellite observations and to provide local monitoring we also
operate several ground-based instruments, like the Brewer, the ozone sonde and
the NO2 sonde. Our division has the Principal Investigatorship for the
Dutch-Finnish instrument OMI, launched in 2004 on NASA's EOS-Aura satellite,
and for the Dutch-ESA instrument TROPOMI, to be launched early in 2016 on ESA's
Sentinel-5 Precursor satellite.
A thirty year time series of the ozone hole (left) and a global air
pollution map of NO2 (right).
2014-07-15: OMI 10 years in orbit
On 15 July 2014 we celebrated at KNMI the 10-th anniversary of OMI, the Ozone Monitoring Instrument.Read more...
Contiguous polarisation spectra of the Earth from 300 to 850 nm measured by GOME-2 onboard MetOp-A
In this paper we present the first contiguous high-resolution spectra of
the Earth's polarisation observed by a satellite instrument. The
measurements of the Stokes fraction Q/I are performed by the spectrometer
GOME-2 onboard the MetOp-A satellite.Read more...
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2014-05-20: Evaluation of SCIAMACHY Oxygen A band cloud heights using Cloudnet measurements
Two SCIAMACHY O2 A band cloud height products (FRESCO v6 and ESA Level 2 v5.02) are evaluated using ground-based radar/lidar measurements between January 2003 and December 2011. The radar/lidar profiles are obtained at the Cloudnet sites of Cabauw and Lindenberg, and are averaged for 1 h centered at the SCIAMACHY overpass time. In total we have 217 cases of single-layer clouds and 204 cases of multilayer clouds. We find that the ESA L2 cloud top height has a better agreement with the Cloudnet cloud top height than the Cloudnet cloud middle height.Read more...