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| Titel |
Sea surface wind speed estimation from space-based lidar measurements |
| VerfasserIn |
Y. Hu, K. Stamnes, M. Vaughan, J. Pelon, C. Weimer, D. Wu, M. Cisewski, W. Sun, P. Yang, B. Lin, A. Omar, D. Flittner, C. Hostetler, C. Trepte, D. Winker, G. Gibson, M. Santa-Maria |
| 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 ; 8, no. 13 ; Nr. 8, no. 13 (2008-07-08), S.3593-3601 |
| Datensatznummer |
250006272
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| Publikation (Nr.) |
 copernicus.org/acp-8-3593-2008.pdf |
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| Zusammenfassung |
| Global satellite observations of lidar backscatter measurements acquired by
the Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observation
(CALIPSO) mission and collocated sea surface wind speed data from the
Advanced Microwave Scanning Radiometer for the Earth Observing System
(AMSR-E), are used to investigate the relation between wind driven wave
slope variance and sea surface wind speed. The new slope variance – wind
speed relation established from this study is similar to the linear relation
from Cox-Munk (1954) and the log-linear relation from Wu (1990) for
wind speed larger than 7 m/s and 13.3 m/s, respectively. For wind speed less
than 7 m/s, the slope variance is proportional to the square root of the
wind speed, assuming a two dimensional isotropic Gaussian wave slope
distribution. This slope variance – wind speed relation becomes linear if a
one dimensional Gaussian wave slope distribution and linear slope variance – wind speed
relation are assumed. Contributions
from whitecaps and subsurface backscattering are effectively removed by
using 532 nm lidar depolarization measurements. This new slope variance –
wind speed relation is used to derive sea surface wind speed from CALIPSO
single shot lidar measurements (70 m spot size), after correcting for
atmospheric attenuation. The CALIPSO wind speed result agrees with the
collocated AMSR-E wind speed, with 1.2 m/s rms error. Ocean surface with
lowest atmospheric loading and moderate wind speed (7–9 m/s) is used as target
for lidar calibration correction. |
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