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Methods to homogenize wind speeds from ships and buoys

Methods to homogenize wind speeds from ships and buoys
Methods to homogenize wind speeds from ships and buoys
Marine winds reported by Voluntary Observing Ships (VOS) and moored buoys require adjustment to provide a homogeneous record of the marine climate. Known sources of inhomogeneity arise from differences in measurement height and method, averaging method and atmospheric stability; methods are available to correct for these. However, significant differences remain in a paired dataset of ship and buoy winds. Regression methods to remove this remaining inconsistency are discussed, and a ranked regression method chosen as most appropriate to adjust ship wind speeds to yield a similar distribution. We show the factors, such as vessel type, that affect the regression results. The corrections, derived from a high-quality paired dataset with rigorous quality control, are effective at reducing inhomogeneity in monthly mean wind speed distributions derived from the International Comprehensive Ocean–Atmosphere Data Set.
wind speed, buoy, VOS, bias, ranked regression
979-995
Thomas, B.R.
7d0175f0-1594-492a-b7a1-e73defb8abf1
Kent, E.C.
ea23f6f0-ccf6-4702-a5c9-184e9c5d4427
Swail, V.R.
d248da05-6c75-4a30-b4b8-fc09fda91539
Thomas, B.R.
7d0175f0-1594-492a-b7a1-e73defb8abf1
Kent, E.C.
ea23f6f0-ccf6-4702-a5c9-184e9c5d4427
Swail, V.R.
d248da05-6c75-4a30-b4b8-fc09fda91539

Thomas, B.R., Kent, E.C. and Swail, V.R. (2005) Methods to homogenize wind speeds from ships and buoys. International Journal of Climatology, 25 (7), 979-995. (doi:10.1002/joc.1176).

Record type: Article

Abstract

Marine winds reported by Voluntary Observing Ships (VOS) and moored buoys require adjustment to provide a homogeneous record of the marine climate. Known sources of inhomogeneity arise from differences in measurement height and method, averaging method and atmospheric stability; methods are available to correct for these. However, significant differences remain in a paired dataset of ship and buoy winds. Regression methods to remove this remaining inconsistency are discussed, and a ranked regression method chosen as most appropriate to adjust ship wind speeds to yield a similar distribution. We show the factors, such as vessel type, that affect the regression results. The corrections, derived from a high-quality paired dataset with rigorous quality control, are effective at reducing inhomogeneity in monthly mean wind speed distributions derived from the International Comprehensive Ocean–Atmosphere Data Set.

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More information

Published date: 2005
Keywords: wind speed, buoy, VOS, bias, ranked regression

Identifiers

Local EPrints ID: 16205
URI: http://eprints.soton.ac.uk/id/eprint/16205
PURE UUID: 231926ff-3c6b-4760-9b90-14cdf76e2935

Catalogue record

Date deposited: 29 Jun 2005
Last modified: 15 Mar 2024 05:46

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Contributors

Author: B.R. Thomas
Author: E.C. Kent
Author: V.R. Swail

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