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In-Situ Instrumentation
The measurements performed by the remote sensors
will be supported by the most advanced in-situ instruments currently
available. In-situ measurements
are foreseen
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on board
HALO and
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on board of the
DLR
Cessna Grand Caravan for measurements in the
planetary boundary layer
HALO:
JIG, the Jena Instrument for
Greenhouse gas measurements,
was successfully
certified and deployed onboard HALO for the in-situ
measurement of CO2, CH4, CO, and H2O during
the test campaign for the CHARM-F system. JIG uses
Cavity Ringdown Laser Spectrometry (CRDS) and
is
based on the GHG instrument developed for the regular measurements using
passenger aircraft within IAGOS (In-Service Aircraft for a Global Observing
System). |
Jena Instrument for Greenhouse Gases (JIG) on the HALO aircraft |
For
the CoMet campaign,
the whole air sampler JAS (Jena Air Sampler) will be deployed in addition to
JIG. The collected air samples will be subsequently analysed in the
laboratory for the following species: CO2, CH4, CO, N2O,
H2, SF6, as well as the isotopes 13C in CH4,
2H in CH4, 13C in CO2, and
18O in CO2. Using isotope analysis, the origin of the
GHGs (e.g. thermogenic vs. biogenic
CH4) can be inferred.
Both, JIG and JAS have been developed at Max Planck Institute for
Biogeochemistry (MPI-BGC). |
Jena Air Sampler (JAS) |
Cessna:
Onboard the DLR Cessna Grand Caravan, a set of very similar instruments will
be deployed and measure a variety of species mainly within the boundary
layer. Those are operated by DLR:
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A Cavity Ringdown Spectrometer (CRDS) to measure
CH4 and CO2
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A Quantum Cascade Laser Spectrometer (QCLS) to
measure CH4, CO2, CO, C2H6, and N2O.
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A whole air sampler (C-AS, Cessna Air sampler)
which is a downsized version of the JAS instrument for subsequent
laboratory analysis. The operation of this instrument is a joint
activity of MPI and
DLR.
Furthermore, the METPOD (developed by DLR Flight
Experiments) will be deployed, an instrument attached underwing to measure
the basic meteorological parameters (p, T, wind and relative humidity).
Cessna-CRDS |
Cessna-QCLS |
C-AS |
Cessna-METPOD |
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