A Comparison of Summer Current Measurements in the Drake Passage

A. F. Treshnikov Arctic and Antarctic Résearch Institute, Leningrad, U.S.S.R.

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R. D. Pillsbury School of Oceanography, Oregon State University, Corvallis 97331

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W. D. Nowlin Jr. Department of Oceanography, Texas A&M University, College Station 77843

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E. I. Sarukanyan Arctic and Antarctic Research Institute, Leningrad, U.S.S.R.

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N. P. Smirnov Arctic and Antarctic Research Institute, Leningrad, U.S.S.R.

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Abstract

During the austral summer of 1974–75 direct measurements of currents in the Drake Passage were made. One data set was collected by the Soviet Arctic and Antarctic Research Institute while another set was collected by Oregon State University as a part of the IDOE/ISOS program. The Soviet data from 61°11′S, 62°31′W beginning on 25 December and ending on 10 January are compared with the U. S. data collected at 60°45′S, 62°15′W. While there is a spatial separation of 44 km and a time separation of 47 days, there are significant similarities in the energy spectra and in the trends of the velocity components. Comparison between moorings at 59°03′S, 63°24′W and 58°46.5′S, 64°24′W yields similar results.

Abstract

During the austral summer of 1974–75 direct measurements of currents in the Drake Passage were made. One data set was collected by the Soviet Arctic and Antarctic Research Institute while another set was collected by Oregon State University as a part of the IDOE/ISOS program. The Soviet data from 61°11′S, 62°31′W beginning on 25 December and ending on 10 January are compared with the U. S. data collected at 60°45′S, 62°15′W. While there is a spatial separation of 44 km and a time separation of 47 days, there are significant similarities in the energy spectra and in the trends of the velocity components. Comparison between moorings at 59°03′S, 63°24′W and 58°46.5′S, 64°24′W yields similar results.

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