Abstract
As part of Doldrums, the third of three International Geophysical Year oceanographical expeditions of the Scripps Institution of Oceanography, direct current measurements were made in the centre of the equatorial countercurrent, 7° 52′ N., 107° 30′ W. The techniques were similar to those used three months previously, when measurements were made of the Cromwell current at the equator, 140° W.1. In the top 300 m. observations were made by suspending a propeller-type current meter (a modified Roberts meter) from a drifting ship and measuring the apparent velocity at different depths from the flow of water past the meter while at the same time observing by radar the drift of the ship from a fixed reference point—a taut wire buoy anchored in 2,200 fathoms. Below 300 m. measurements were made by following the drift of Swallow current floats2.
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References
Knauss, J. A., and King, J. E., Nature, 182, 601 (1958).
Swallow, J. C., Deep Sea Res., 3, 74 (1955).
Sverdrup, H. U., Johnson, M. W., and Fleming, R. H., “The Oceans” (Prentice-Hall, New York, 1942).
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KNAUSS, J., PEPIN, R. Measurements of the Pacific Equatorial Countercurrent. Nature 183, 380 (1959). https://doi.org/10.1038/183380a0
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DOI: https://doi.org/10.1038/183380a0
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