Shearmeter floats in the area of the WHOI Brazil Basin Tracer Release Experiment : technical and oceanographic data


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dc.contributor.author Duda, Timothy F.
dc.contributor.author Guest, Brian J.
dc.contributor.author Wooding, Christine M.
dc.contributor.author Jones, Clayton M.
dc.contributor.author Lelievre, Scott
dc.contributor.author Webb, Douglas C.
dc.coverage.spatial Brazil Basin
dc.date.accessioned 2005-07-15T20:13:58Z
dc.date.available 2005-07-15T20:13:58Z
dc.date.issued 2002-01
dc.identifier.uri http://hdl.handle.net/1912/26
dc.description.abstract Six drifting floats designed to measure shear were deployed in the vicinity of the Brazil Basin Tracer Release Experiment. The one-year long time series of oceanographic conditions obtained by the floats are for direct comparison with long-term tracer dispersion. The purpose of the tracer dispersion experiment was to study mixing of Antarctic Bottom Water at approximately 4000 m depth with less dense water above. Two of the floats returned shear records, one from about 1660 m depth and one from about 2800 m depth. Mean shear at 1660 m was 2.2 x 10 -3 s-1 with N = 1.1 cph, about 1.9 times the Garrett-Munk model amount. Mean shear at 2800 m was 1.1 x 10-3 with N = 0.5 cph, about 2.2 times Garrett-Munk. There was no apparent depth structure to the shear recorded by the near-bottom float moving over the mountainous seafloor. The two shear time series and the local tidal velocities were not strongly correlated, but the tide and shear series did have some similarities. Some variability in the 1660-m shear may be due to atmospheric forcing. Three floats deeper than 2800 m returned one-year long trajectories. Two trajectories were persistently eastward. en
dc.description.sponsorship Funding was provided by the National Science Foundation under Grant Nos. OCE-9416014 and OCE-9906685. en
dc.format.extent 7865323 Bytes
dc.format.mimetype application/pdf
dc.language.iso en_US en
dc.publisher Woods Hole Oceanographic Institution en
dc.relation.ispartofseries WHOI Technical Reports en
dc.relation.ispartofseries WHOI-2002-01 en
dc.subject Shear en
dc.subject Abyssal currents en
dc.subject Finestructure en
dc.title Shearmeter floats in the area of the WHOI Brazil Basin Tracer Release Experiment : technical and oceanographic data en
dc.type Technical Report en
dc.identifier.doi 10.1575/1912/26

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