Global ocean mean wave period data: validation and description
Global ocean mean wave period data: validation and description
A global comparison of altimeter and ERA-40 mean wave period data is performed for the first time. Altimeter and ERA-40 mean wave period are shown to compare well in non-swell-dominated conditions. Triply collocated altimeter, buoy, and ERA-40 data show that the variance of the random errors is bigger for the ERA-40 data and smaller for the buoy data. A new expression is given to relate altimeter data to wave period in wind-dominated conditions. Provided this correction is applied, altimeter data are adequate for the most needed validation of global model mean wave period data in non-swell-dominated conditions. Triply collocated altimeter, buoy, and ERA-40 also reveal that altimeter mean wave period is reliable even in swell conditions for moderate to high winds, in contrast to previous suggestions which limited its validity to wind-dominated seas.
C02003-[12pp]
Caires, S.
4e3a2511-cca9-48ee-865b-b85a1e16985b
Sterl, A.
edc19096-737b-44f2-8d49-95203d6b9b17
Gommenginger, C.P.
f0db32be-34bb-44da-944b-c6b206ca4143
February 2005
Caires, S.
4e3a2511-cca9-48ee-865b-b85a1e16985b
Sterl, A.
edc19096-737b-44f2-8d49-95203d6b9b17
Gommenginger, C.P.
f0db32be-34bb-44da-944b-c6b206ca4143
Caires, S., Sterl, A. and Gommenginger, C.P.
(2005)
Global ocean mean wave period data: validation and description.
Journal of Geophysical Research, 110 (C2), .
(doi:10.1029/2004JC002631).
Abstract
A global comparison of altimeter and ERA-40 mean wave period data is performed for the first time. Altimeter and ERA-40 mean wave period are shown to compare well in non-swell-dominated conditions. Triply collocated altimeter, buoy, and ERA-40 data show that the variance of the random errors is bigger for the ERA-40 data and smaller for the buoy data. A new expression is given to relate altimeter data to wave period in wind-dominated conditions. Provided this correction is applied, altimeter data are adequate for the most needed validation of global model mean wave period data in non-swell-dominated conditions. Triply collocated altimeter, buoy, and ERA-40 also reveal that altimeter mean wave period is reliable even in swell conditions for moderate to high winds, in contrast to previous suggestions which limited its validity to wind-dominated seas.
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Published date: February 2005
Identifiers
Local EPrints ID: 17409
URI: http://eprints.soton.ac.uk/id/eprint/17409
ISSN: 0148-0227
PURE UUID: 73712b2f-f77e-4a39-84f3-2828bf1fbdf7
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Date deposited: 07 Sep 2005
Last modified: 15 Mar 2024 05:59
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Author:
S. Caires
Author:
A. Sterl
Author:
C.P. Gommenginger
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