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| Titel |
Water vapour profiles by ground-based FTIR spectroscopy: study for an optimised retrieval and its validation |
| VerfasserIn |
M. Schneider, F. Hase, T. Blumenstock |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1680-7316
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| Digitales Dokument |
URL |
| Erschienen |
In: Atmospheric Chemistry and Physics ; 6, no. 3 ; Nr. 6, no. 3 (2006-03-14), S.811-830 |
| Datensatznummer |
250003524
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| Publikation (Nr.) |
 copernicus.org/acp-6-811-2006.pdf |
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| Zusammenfassung |
| The sensitivity of ground-based instruments measuring in the
infrared with respect to tropospheric water vapour content is
generally limited to the lower and middle troposphere. The large
vertical gradients and variabilities avoid a better sensitivity
for the upper troposphere/lower stratosphere (UT/LS) region. In
this work an optimised retrieval is presented and it is
demonstrated that compared to a commonly applied method, it
improves the performance of the FTIR technique. The reasons for
this improvement and the possible deficiencies of the method are
discussed. Only by applying the method proposed here and using
measurements performed at mountain observatories can water vapour
variabilities in the UT/LS be detected in a self-consistent
manner. The precision, expressed as noise to signal ratio, is
estimated at 45%. In the middle and lower troposphere,
precisions of 22% are achieved. These estimations are
confirmed by a comparison of retrieval results based on real FTIR
measurements with coinciding measurements of synoptical
meteorological radiosondes. |
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