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| Titel |
Retrieval of tropospheric water vapour by using spectra of a 22 GHz radiometer |
| VerfasserIn |
R. Bleisch, N. Kämpfer, A. Haefele |
| 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 ; 4, no. 9 ; Nr. 4, no. 9 (2011-09-15), S.1891-1903 |
| Datensatznummer |
250002096
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| Publikation (Nr.) |
 copernicus.org/amt-4-1891-2011.pdf |
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| Zusammenfassung |
In this paper, we present an approach to retrieve
tropospheric water vapour profiles from pressure broadened emission spectra
at 22 GHz, measured by a ground based microwave radiometer installed in the
south of Bern at 905 m.
Classical microwave instruments concentrating on the troposphere observe
several channels in the center and the wings of the water vapour line
(20–30 Ghz), whereas our retrieval approach uses spectra with a bandwidth of
1 GHz and a high resolution around the center of the 22 GHz water vapour
line.
The retrieval is sensitive up to 7 km with a vertical resolution of 3–5 km.
Comparisons with profiles from operational balloon soundings, performed at
Payerne, 40 km away from the radiometer location, showed a good agreement up
to 7 km with a correlation of above 0.8. The retrievals shows a wet bias of
10–20% compared to the sounding. |
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