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 in 2014/15 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).
2013-05-27: TES tropospheric O3 validated with sonde data: spatial patterns and temporal stability in the bias
Satellite measurements provide a relatively new perspective on global tropospheric ozone (O3) distributions and their changes in time. The Tropospheric Emission Spectrometer, TES, is operational since mid 2004 and is a suitable sensor to investigate multi-annual changes in tropospheric O3 from space.Read more...
2012-12-11: A new pole hole
In winter 2011, an ozone hole appeared over the Arctic for the first time. Read more...
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2012-10-05: Monitoring volcanic ash aerosol height from GOME-2 Oxygen A band measurements
Large volcanic ash plumes can have a serious impact on aviation. The height of the ash layer is an relevant parameter in the derivation of aerosol mass concentration which can be harmful for aircraft engines in case of high concentration. Recently Wang et al. (2012) demonstrate that it is possible to derive aerosol height from Oxygen A band measurement for absorbing aerosols such as volcanic ash plumes, biomass burning aerosols and desert dust aerosols.Read more...