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| Titel |
Measurement of wind profiles by motion-stabilised ship-borne Doppler lidar |
| VerfasserIn |
P. Achtert, I. M. Brooks, B. J. Brooks, B. I. Moat, J. Prytherch, P. O. G. Persson, M. Tjernström |
| 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 ; 8, no. 11 ; Nr. 8, no. 11 (2015-11-30), S.4993-5007 |
| Datensatznummer |
250116696
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| Publikation (Nr.) |
 copernicus.org/amt-8-4993-2015.pdf |
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| Zusammenfassung |
| Three months of Doppler lidar wind measurements were obtained during
the Arctic Cloud Summer Experiment on the icebreaker Oden during the
summer of 2014. Such ship-borne Doppler measurements require active
stabilisation to remove the effects of ship motion. We demonstrate
that the combination of a commercial Doppler lidar with a custom-made
motion-stabilisation platform enables the retrieval of wind profiles
in the Arctic atmospheric boundary layer during
both cruising and ice-breaking with statistical
uncertainties comparable to land-based
measurements. This held true particularly within the
atmospheric boundary layer even though the overall aerosol
load was very low. Motion stabilisation was successful for high wind
speeds in open water and the resulting wave conditions. It allows for
the retrieval of vertical winds with a random error below
0.2 m s−1. The comparison of lidar-measured wind and
radio soundings gives a mean bias of 0.3 m s−1 (2°)
and a mean standard deviation of 1.1 m s−1 (12°)
for wind speed (wind direction). The agreement for wind direction
degrades with height. The combination of a motion-stabilised platform
with a low-maintenance autonomous Doppler lidar has the
potential to enable
continuous long-term high-resolution ship-based wind profile
measurements over the oceans. |
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