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| Titel |
Ice supersaturation as seen from TOVS |
| VerfasserIn |
K. Gierens, R. Kohlhepp, P. Spichtinger, M. Schroedter-Homscheidt |
| 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 ; 4, no. 2 ; Nr. 4, no. 2 (2004-03-29), S.539-547 |
| Datensatznummer |
250001610
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| Publikation (Nr.) |
 copernicus.org/acp-4-539-2004.pdf |
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| Zusammenfassung |
| We have analysed the upper tropospheric humidity with respect to ice
(UTHi) data product obtained from the Television Infrared Observation Satellite
(TIROS) Operational Vertical Sounder (TOVS)
instrument onboard the National Oceanic and Atmospheric Administration
NOAA-14 polar orbiting satellite. While in the production of the
official UTHi product values in excess of 100% are ignored,
we do not so - in view of many recent
results obtained from a variety of other in-situ and remote sensing
instruments showing that ice supersaturation frequently occurs in the
upper troposphere. We show that TOVS is able to detect ice
supersaturation at the correct locations (however, only in less than
one percent of its soundings, presumably because of TOVS's low
vertical resolution), and that the supersaturation follows the well
known exponential behaviour. We conclude that values of UTHi in excess
of saturation should not be considered a measurement error
anymore. The similar re-analysis of TOVS data back to 1979 could give
important insights into trends of upper tropospheric humidity. |
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