Abstract
WE have succeeded in measuring the flow of the Pacific Equatorial Undercurrent first described by Cromwell, Montgomery and Stroup1. Taut-wire buoys2 were anchored in 2,300 fathoms as reference points. Measurements at different depths were made by suspending a modified Roberts current meter3 from a drifting ship. A vibrotron pressure element was used to give the depth of the meter, and the drift of the ship relative to the anchored buoy was measured by radar. To define the bottom of the undercurrent four measurements were made with Swallow type neutral buoyant floats4. These measurements were the principal object of the Dolphin Expedition March 27–June 10, 1958, one of the special cruises of the International Geophysical Year oceanographic programme.
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References
Cromwell, T., Montgomery, R. B., and Stroup, E. D., Science, 119, 648 (1954).
Isaacs, J., Huffer, R. P., and Kidd, L. W., Science, 125, 341 (1957).
Roberts, E. B., “Roberts Radio Current Meter Modified II Operating Manual”, 32 (U.S. Dept. of Commerce, Washington, D.C., 1952).
Swallow, J. C., Deep Sea Res., 3, 74 (1955).
Volkmann, G., Knauss, J., and Vine, A., Trans. Amer. Geophys. Union, 37, 573 (1956).
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KNAUSS, J., KING, J. Observations of the Pacific Equatorial Undercurrent. Nature 182, 601–602 (1958). https://doi.org/10.1038/182601a0
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DOI: https://doi.org/10.1038/182601a0
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