Measurement of wind profiles by motion-stabilised ship-borne Doppler lidar
Measurement of wind profiles by motion-stabilised ship-borne Doppler lidar
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.
4993-5007
Achtert, P.
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Brooks, I.M.
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Brooks, B.J.
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Moat, B.I.
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Prytherch, J.
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Persson, P.O.G.
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Tjernström, M.
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30 November 2015
Achtert, P.
deb38a34-039b-49d6-b5ba-b65146741470
Brooks, I.M.
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Brooks, B.J.
132ba817-9617-4a4c-b14a-2f1782e923cf
Moat, B.I.
497dbb18-a98f-466b-b459-aa2c872ad2dc
Prytherch, J.
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Persson, P.O.G.
d2786439-b989-4061-9ffc-70dc27e43195
Tjernström, M.
71cb72da-d618-4aa1-812a-22261569b128
Achtert, P., Brooks, I.M., Brooks, B.J., Moat, B.I., Prytherch, J., Persson, P.O.G. and Tjernström, M.
(2015)
Measurement of wind profiles by motion-stabilised ship-borne Doppler lidar.
Atmospheric Measurement Techniques, 8 (11), .
(doi:10.5194/amt-8-4993-2015).
Abstract
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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Published date: 30 November 2015
Organisations:
Marine Physics and Ocean Climate
Identifiers
Local EPrints ID: 384834
URI: http://eprints.soton.ac.uk/id/eprint/384834
ISSN: 1867-8548
PURE UUID: 8c0d20f0-6192-4a52-add4-c83802bfae63
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Date deposited: 07 Dec 2015 16:05
Last modified: 14 Mar 2024 22:05
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Author:
P. Achtert
Author:
I.M. Brooks
Author:
B.J. Brooks
Author:
B.I. Moat
Author:
J. Prytherch
Author:
P.O.G. Persson
Author:
M. Tjernström
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