The University of Southampton
University of Southampton Institutional Repository

Measurement of wind profiles by motion-stabilised ship-borne Doppler lidar

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.
1867-8548
4993-5007
Achtert, P.
deb38a34-039b-49d6-b5ba-b65146741470
Brooks, I.M.
e1e4e3cb-8165-40f2-900b-81ff12bc1de2
Brooks, B.J.
132ba817-9617-4a4c-b14a-2f1782e923cf
Moat, B.I.
497dbb18-a98f-466b-b459-aa2c872ad2dc
Prytherch, J.
6bad8c05-884c-42af-9b8e-8e56772aad9a
Persson, P.O.G.
d2786439-b989-4061-9ffc-70dc27e43195
Tjernström, M.
71cb72da-d618-4aa1-812a-22261569b128
Achtert, P.
deb38a34-039b-49d6-b5ba-b65146741470
Brooks, I.M.
e1e4e3cb-8165-40f2-900b-81ff12bc1de2
Brooks, B.J.
132ba817-9617-4a4c-b14a-2f1782e923cf
Moat, B.I.
497dbb18-a98f-466b-b459-aa2c872ad2dc
Prytherch, J.
6bad8c05-884c-42af-9b8e-8e56772aad9a
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), 4993-5007. (doi:10.5194/amt-8-4993-2015).

Record type: Article

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.

PDF
amt-8-4993-2015.pdf - Version of Record
Available under License Other.
Download (4MB)

More information

Published date: 30 November 2015
Organisations: Marine Physics and Ocean Climate

Identifiers

Local EPrints ID: 384834
URI: https://eprints.soton.ac.uk/id/eprint/384834
ISSN: 1867-8548
PURE UUID: 8c0d20f0-6192-4a52-add4-c83802bfae63

Catalogue record

Date deposited: 07 Dec 2015 16:05
Last modified: 17 Jul 2017 20:01

Export record

Altmetrics

Contributors

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

University divisions

Download statistics

Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.

View more statistics

Atom RSS 1.0 RSS 2.0

Contact ePrints Soton: eprints@soton.ac.uk

ePrints Soton supports OAI 2.0 with a base URL of https://eprints.soton.ac.uk/cgi/oai2

This repository has been built using EPrints software, developed at the University of Southampton, but available to everyone to use.

We use cookies to ensure that we give you the best experience on our website. If you continue without changing your settings, we will assume that you are happy to receive cookies on the University of Southampton website.

×