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dc.contributor.authorChester, David B.  Concept link
dc.coverage.spatial38°N, 55°W
dc.date.accessioned2012-11-06T20:00:10Z
dc.date.available2012-11-06T20:00:10Z
dc.date.issued1993-02
dc.identifier.urihttps://hdl.handle.net/1912/5511
dc.descriptionSubmitted in partial fulfillment of the requirements for the degree of Doctor of Philosophy at the Massachusetts Institute of Technology and the Woods Hole Oceanographic Institution February 1993en_US
dc.description.abstractReciprocal acoustic transmissions made in a region just south of the Gulf Stream are analyzed to determine the structure and variability of temperature, current velocity, and vorticity fields at the northern extent of the southern recirculation gyre. For ten months (November, 1988 through August, 1989), a pentagonal array of tomographic transceivers was situated in a region centered at 38°N, 55°W as part of the eastern array of the SYNOP (SYNoptic Ocean Prediction) Experiment. The region of focus is one rich in mesoscale energy, with the influence of local Gulf Stream meandering and cold-core ring activity strikingly evident. Daily-averaged acoustic transmissions yielded travel times which were inverted to obtain estimates of range-averaged temperature and current velocity fields, and area-averaged relative vorticity fields. The acoustically determined estimates are consistent with nearby current meter measurements and satellite infrared imagery. The signature of cold-core rings is clearly evident in the sections. Spectral estimates of the fields are dominated by motions with periodicities ranging from 32-128 days. Second-order statistics, such as eddy kinetic energies, and heat and momentum fluxes, are also estimated. The integrating nature of the tomographic measurement has been exploited to shed some light on the radiation of eddy energy from the Gulf Stream. The Eliassen-Palm flux diagnostic has been applied to an investigation of wave radiation from the Gulf Stream. Results of the diagnosis suggest that the Gulf Stream itself is the source of wave energy radiating into the far field and found in the interior of the North Atlantic subtropical gyre.en_US
dc.description.sponsorshipThis research was carried out under Office of Naval Research (ONR) University Research Initiative contract N00014-86-K-0751 and ONR contract N00014- 90-J-1481. Construction of the tomographic instruments was supported by grants and contracts with MIT: National Science Foundation grant OCE 85-12430 and by ONR. The field work was supported by ONR under contract N00014-85-G-0241 (Secretary of the Navy Professorship (C. Wunsch)).en_US
dc.format.mimetypeapplication/pdf
dc.language.isoen_USen_US
dc.publisherMassachusetts Institute of Technology and Woods Hole Oceanographic Institutionen_US
dc.relation.ispartofseriesWHOI Thesesen_US
dc.subjectOcean circulationen_US
dc.subjectTomographyen_US
dc.titleA tomographic view of the Gulf Stream southern recirculation gyre at 38°N, 55°Wen_US
dc.typeThesisen_US
dc.identifier.doi10.1575/1912/5511


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