Internal wave kinematics in the upper tropical Atlantic.

Käse, Rolf H. and Siedler, Gerold (1980) Internal wave kinematics in the upper tropical Atlantic. Deep Sea Research Part A. Oceanographic Research Papers, 26 (Suppl. 1). pp. 161-189. DOI 10.1016/B978-1-4832-8366-1.50014-5.

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Abstract

Horizontal velocity and temperature measurements observed from a two-dimensional array of moored instruments, mooring Fl, are analysed to describe the near-surface internal wave field in the GATE (GARP Atlantic Tropical Experiment) C-scale area. Spectral properties indicate strong deviations from the Garrett and Munk (1972, 1975) deep ocean internal wave models. The frequency spectrum in the upper pycnocline is dominated by three energetic bands centered at 0.0127 (inertial frequency), 0.08 (M2-tidal frequency) and 3 cph. The latter frequency band does not correspond to the local Brunt Väisälä frequency (< 10 cph) and contains about one half of the total internal wave energy of fluctuations with periods less than 10 hours. Cross-spectral analysis of the high frequency internal waves yields corresponding wavelengths of order 1 km consistent with westward propagating first mode wave groups, if the effect of Doppler shift due to a strong mean current is taken into account

Document Type: Article
Keywords: physical oceanography; Atlantic Ocean
Research affiliation: OceanRep > GEOMAR > FB1 Ocean Circulation and Climate Dynamics > FB1-TM Theory and Modeling
OceanRep > GEOMAR > FB1 Ocean Circulation and Climate Dynamics > FB1-PO Physical Oceanography
Refereed: Yes
Open Access Journal?: No
DOI etc.: 10.1016/B978-1-4832-8366-1.50014-5
ISSN: 0198-0149
Projects: GATE
Date Deposited: 11 Sep 2012 11:37
Last Modified: 22 Sep 2016 12:38
URI: http://oceanrep.geomar.de/id/eprint/15222

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