Peter Spietz
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Juan Carlos Gomez Martin
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Bilgehan Gür
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The research of the Department
of Physics and Chemistry of the Atmosphere is focussed on improving
our understanding of the troposphere and stratosphere. In addition to laboratory
studies of the kinetics and spectroscopy of atmospheric free radicals
and gases, it has active research groups making both in situ and remote
sensing measurements of atmospheric trace constituents.
Within this context the studies undertaken
by the Molecular Spectroscopy and Chemical Kinetics Group are
- to provide accurate reference spectra to
be used in atmospheric remote sensing using GOME and SCIAMACHY satellite
spectrometers,
- to provide rate coefficient reference
data needed to determine absolute cross sections of relevant atmospheric
species,
- to determine atmospheric trace gas concentrations
using optical methods,
- to study molecular physics and chemistry
related to atmospheric problems,
- and - in close co-operation with the corresponding
agencies and industrial facilities - the on-ground calibration of satellite
spectrometers as done for GOME-1 and SCIAMACHY.
The technique in general
is absorption spectroscopy: the interaction of light with atoms and molecules.
In more detail the activities cover:
- High resolved UV/vis/NIR Fourier Transform
Spectroscopy (FTS);
- Time resolved UV/vis/NIR Fourier Transform
Spectroscopy (TR-FTS);
- High speed time resolved UV/vis
absorption spectroscopy using flash photolysis combined with a modern
fast CCD time resolved detection set-up;
- Time resolved VUV/UV resonance absorption
spectroscopy of atomic species;
- High resolved UV/vis/NIR monitoring of
atmospheric trace gases using Fourier Transform Spectroscopy (SOCCER);
- Mobile gas handling and optical absorption
set-up for direct on-ground trace gas absorption measurements with satellite
flight models (CATGAS);
- "Quantum theoretical calculations" of UV-visible molecular
spectra.
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