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| Titel |
FTIR Limb-Sounding in the Arctic UTLS under Cloudy Conditions: The MIPAS-STR PSC Flights during RECONCILE and ESSenCe |
| VerfasserIn |
W. Woiwode, H. Oelhaf, T. Gulde, C. Piesch, A. Ebersoldt, J. Orphal |
| Konferenz |
EGU General Assembly 2012
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 14 (2012) |
| Datensatznummer |
250069059
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| Zusammenfassung |
| The FTIR Limb-Sounder MIPAS-STR (Michelson Interferometer for Passive Atmospheric
Sounding - STRatospheric Aircraft) was operated onboard the high-flying (~19 km) research
aircraft M55-Geophysica during the RECONCILE (Reconciliation of essential process
parameters for an enhanced predictability of arctic stratospheric ozone loss and its
climate interactions) and the ESSenCe (ESa Sounder Campaign 2011) campaigns
in arctic spring 2010 and early arctic winter 2011/2012. From the MIPAS-STR
measurements, vertical profiles and spatially resolved vertical cross-sections of temperature,
trace-gases (e.g. HNO3, O3, ClONO2, ClO, CFCs) and cloud-coverage are derived in the
vertical range between 4 and 20 km. During some RECONCILE and ESSenCe
flights, MIPAS-STR probed air-masses below and inside Polar Stratospheric Clouds
(PSCs). This region is hardly accessible by satellite-borne and balloon-borne IR
remote-sensing, since vertically extended and optical thick PSC clouds complicate
or even hamper IR measurements in this altitude-range. In contrast, MIPAS-STR
onboard the Geophysica aircraft sampled the lower boundary of extended PSC
clouds and the area below, allowing for spatially resolved insights into the chemical
properties of this region. We discuss our retrieval approach for spectra with low cloud
indices (i.e. increased optical thickness in the IR) and show current results from
cloud-affected measurements at tropospheric and stratospheric altitudes, with emphasis on
denitrification processes and chlorine chemistry. The results support the candidate Earth
Explorer 7 mission PREMIER (PRocess Exploration through Measurements of
Infrared and millimetre-wave Emitted Radiation) with regard to the probing of the
UTLS region under cloud-free and cloudy conditions with high spatial resolution,
and gives a perspective of the capabilities of the new GLORIA (Gimballed Limb
Observer for Radiance Imaging of the Atmosphere) instrument, which has been
developed at the KIT (Karlsruhe Institute of Technology, Germany) and the FZJ
(Forschungszentrum Jülich GmbH, Germany), followed by maiden flights in December 2011. |
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