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| Titel |
Measurement of the Arctic UTLS composition in presence of clouds using millimetre-wave heterodyne spectroscopy |
| VerfasserIn |
E. Castelli, B. M. Dinelli, S. Del Bianco, D. Gerber, B. P. Moyna, R. Siddans, B. J. Kerridge, U. Cortesi |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1867-1381
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| Digitales Dokument |
URL |
| Erschienen |
In: Atmospheric Measurement Techniques ; 6, no. 10 ; Nr. 6, no. 10 (2013-10-16), S.2683-2701 |
| Datensatznummer |
250085083
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| Publikation (Nr.) |
 copernicus.org/amt-6-2683-2013.pdf |
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| Zusammenfassung |
| MARSCHALS (Millimetre-wave Airborne Receivers for Spectroscopic
CHaracterisation in Atmospheric Limb Sounding) is a limb viewing instrument
working in the millimetre and sub-millimetre spectral regions (from 294 to
349 GHz). The scientific rationale of MARSCHALS is the study of the Upper
Troposphere and Lower Stratosphere region. In March 2010 MARSCHALS was
deployed on-board the M-55 Geophysica stratospheric aircraft during the
PREMIER(PRocess Exploration through Measurements of Infrared and
millimetre-wave Emitted Radiation)-Ex field campaign. From the campaign base
at Kiruna, Sweden, a research flight to investigate the Arctic atmosphere was
conducted. For the first time the instrument fully exploited the three
spectral bands. In this paper, we present results of the analysis of
MARSCHALS measurements acquired during the PREMIER-Ex flight as processed by
the Millimetre-wave Atmospheric Retrieval Code. For the second time after the
SCOUT-O3 flight in 2005, MARSCHALS measured vertical distributions of
temperature, water vapour, ozone and nitric acid over an altitude range of 4
to 24 km. In addition, vertical profiles of carbon monoxide and nitrous
oxide were obtained for the first time. The measurements were performed in
clear sky conditions and in presence of low and high altitude clouds (that
were able to obscure measurements in the middle infrared spectroscopic
region) and some information about thick clouds were extracted from the data.
The capabilities to derive information on upper tropospheric and lower
stratospheric vertical profiles of temperature and minor constituents from
millimetre-wave limb sounding observations in the northern polar region are
presented and discussed for each of the individual targets. The results of
MARSCHALS data analysis contributed to demonstrate the scientific relevance
and technical feasibility of millimetre-wave limb-sounding of the UTLS
proposed for the ESA Earth Explorer 7 candidate Core Mission PREMIER. PREMIER
was not selected at the end of the Earth Explorer 7 evaluation process, but
it is still being considered for future launch opportunities. |
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