Sea surface height observations of the 34N 'waveguide' in the North Atlantic.
We present a study of the energetic zonal band at 34oN in the North Atlantic using a wavelet analysis of more than 8 years of TOPEX/POSEIDON altimeter data. It is already well-established in the literature that this zonal ‘waveguide’ is dominated by large-scale propagating features. The wavelet anal...
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ftnerc:oai:nora.nerc.ac.uk:100202 2023-05-15T17:29:29+02:00 Sea surface height observations of the 34N 'waveguide' in the North Atlantic. Cromwell, D. 2001 application/pdf http://nora.nerc.ac.uk/id/eprint/100202/ https://nora.nerc.ac.uk/id/eprint/100202/1/Cromwell.pdf http://www.agu.org/journals/gl/gl0119/2001GL012936/pdf/2001GL012936.pdf en eng https://nora.nerc.ac.uk/id/eprint/100202/1/Cromwell.pdf Cromwell, D. 2001 Sea surface height observations of the 34N 'waveguide' in the North Atlantic. Geophysical Research Letters, 28 (19). 3705-3708. Publication - Article PeerReviewed 2001 ftnerc 2023-02-04T19:33:25Z We present a study of the energetic zonal band at 34oN in the North Atlantic using a wavelet analysis of more than 8 years of TOPEX/POSEIDON altimeter data. It is already well-established in the literature that this zonal ‘waveguide’ is dominated by large-scale propagating features. The wavelet analysis yields sea surface height variance at a range of periods and wavelengths, allowing us to observe and quantify evolution of the features in space and time. Signal variance west of the mid-Atlantic ridge at 34oN is larger than to the east of the ridge: by a factor of ~2 in the period band 0.5-0.9 years, in which baroclinic Rossby waves and eddies propagate. The period of the peak energy is reduced crossing the ridge from ~1 year to ~7-9 months, before rising again to the annual cycle on the other side. There is also evidence of energy peaks at periods of ~2-4 years in the Gulf Stream region and east of the ridge. Article in Journal/Newspaper North Atlantic Natural Environment Research Council: NERC Open Research Archive Mid-Atlantic Ridge |
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Open Polar |
collection |
Natural Environment Research Council: NERC Open Research Archive |
op_collection_id |
ftnerc |
language |
English |
description |
We present a study of the energetic zonal band at 34oN in the North Atlantic using a wavelet analysis of more than 8 years of TOPEX/POSEIDON altimeter data. It is already well-established in the literature that this zonal ‘waveguide’ is dominated by large-scale propagating features. The wavelet analysis yields sea surface height variance at a range of periods and wavelengths, allowing us to observe and quantify evolution of the features in space and time. Signal variance west of the mid-Atlantic ridge at 34oN is larger than to the east of the ridge: by a factor of ~2 in the period band 0.5-0.9 years, in which baroclinic Rossby waves and eddies propagate. The period of the peak energy is reduced crossing the ridge from ~1 year to ~7-9 months, before rising again to the annual cycle on the other side. There is also evidence of energy peaks at periods of ~2-4 years in the Gulf Stream region and east of the ridge. |
format |
Article in Journal/Newspaper |
author |
Cromwell, D. |
spellingShingle |
Cromwell, D. Sea surface height observations of the 34N 'waveguide' in the North Atlantic. |
author_facet |
Cromwell, D. |
author_sort |
Cromwell, D. |
title |
Sea surface height observations of the 34N 'waveguide' in the North Atlantic. |
title_short |
Sea surface height observations of the 34N 'waveguide' in the North Atlantic. |
title_full |
Sea surface height observations of the 34N 'waveguide' in the North Atlantic. |
title_fullStr |
Sea surface height observations of the 34N 'waveguide' in the North Atlantic. |
title_full_unstemmed |
Sea surface height observations of the 34N 'waveguide' in the North Atlantic. |
title_sort |
sea surface height observations of the 34n 'waveguide' in the north atlantic. |
publishDate |
2001 |
url |
http://nora.nerc.ac.uk/id/eprint/100202/ https://nora.nerc.ac.uk/id/eprint/100202/1/Cromwell.pdf http://www.agu.org/journals/gl/gl0119/2001GL012936/pdf/2001GL012936.pdf |
geographic |
Mid-Atlantic Ridge |
geographic_facet |
Mid-Atlantic Ridge |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_relation |
https://nora.nerc.ac.uk/id/eprint/100202/1/Cromwell.pdf Cromwell, D. 2001 Sea surface height observations of the 34N 'waveguide' in the North Atlantic. Geophysical Research Letters, 28 (19). 3705-3708. |
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1766123611231354880 |