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Detailed Reference Information |
Cromwell, D. (2001). Sea surface height observations of the 34°N ‘waveguide’ in the North Atlantic. Geophysical Research Letters 28: doi: 10.1029/2001GL012936. issn: 0094-8276. |
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We present a study of the energetic zonal band at 34 ¿N 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 34 ¿N 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. ¿ 2001 American Geophysical Union |
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Abstract |
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Keywords
Oceanography, Physical, Eddies and mesoscale processes, Oceanography, Physical, Sea level variations, Oceanography, Physical, Upper ocean processes |
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Publisher
American Geophysical Union 2000 Florida Avenue N.W. Washington, D.C. 20009-1277 USA 1-202-462-6900 1-202-328-0566 service@agu.org |
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