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| Titel |
An integrated approach toward the incorporation of clouds in the temperature retrievals from microwave measurements |
| VerfasserIn |
F. Navas-Guzmán, O. Stähli, N. Kämpfer |
| 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 ; 7, no. 6 ; Nr. 7, no. 6 (2014-06-06), S.1619-1628 |
| Datensatznummer |
250115812
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| Publikation (Nr.) |
 copernicus.org/amt-7-1619-2014.pdf |
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| Zusammenfassung |
| In this paper, we address the characterization of clouds and its inclusion in
microwave retrievals in order to study its effect on tropospheric temperature
profiles measured by TEMPERA radiometer. TEMPERA is the first ground-based
microwave radiometer that makes it possible to obtain temperature profiles in the
troposphere and stratosphere at the same time. In order to characterize the
clouds a multi-instrumental approach has been adopted. Cloud base altitudes
were detected using ceilometer measurements while the integrated liquid water
was measured by TROWARA radiometer. Both instruments are co-located with
TEMPERA in Bern (Switzerland). Using this information and a constant Liquid
Water Content value inside the cloud a liquid profile is provided to
characterize the clouds in the inversion algorithm. Microwave temperature
profiles have been obtained incorporating this water liquid profile in the
inversion algorithm and also without considering the clouds, in order to
assess its effect on the retrievals. The results have been compared with the
temperature profiles from radiosondes which are launched twice a day at the
aerological station of MeteoSwiss in Payerne (40 km W of Bern). Almost 1
year of data have been analysed and 60 non-precipitating cloud cases were
studied. The statistical analysis carried out over all the cases evidenced
that temperature retrievals improved in most of the cases when clouds were
incorporated in the inversion algorithm. |
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