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Science 19 November 1976:
Vol. 194. no. 4267, pp. 837 - 839
DOI: 10.1126/science.194.4267.837
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Articles

Increased Transport of Antarctic Bottom Water in the Vema Channel During the Last Ice Age

MICHAEL T. LEDBETTER 1 and DAVID A. JOHNSON 2

1 Graduate School of Oceanography, University of Rhode Island, Kingston
2 Woods Hole Oceanographic Institution, Woods Hole, Massachusetts

Particle size analyses of surface sediments in the Vema Channel reveal a spatial variation related to the present hydrography. Similar analyses of sediment deposited during the last ice age (18,000 years before the present) indicate a maximum shallowing of the upper limit of Antarctic Bottom Water (AABW) of about 100 meters, coupled with an increase in velocity, which resulted in an increase in AABW transport.

Submitted on July 2, 1972
Revised on August 4, 1976


THIS ARTICLE HAS BEEN CITED BY OTHER ARTICLES:
Influence of bottom currents on sediment texture and sea-floor morphology in the Argentine Basin.
M. T. Ledbetter and A. Klaus (1987)
Geological Society, London, Special Publications 31, 23-31
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The High-Velocity Core of the Western Boundary Undercurrent at the Base of the U.S. Continental Rise.
D. L. Bulfinch, D. L. BULFINCH, M. T. LEDBETTER, B. B. ELLWOOD, and W. L. BALSAM (1982)
Science 215, 970-973
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Paleocurrent Indicators in Deep-Sea Sediment.
B. B. Ellwood, B. B. ELLWOOD, and M. T. LEDBETTER (1979)
Science 203, 1335-1337
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