We are extremely grateful to Dick Limeburner who was responsible for acquisition of the CTD data, Scott Worrilow who conducted the current meter operations, and Susan Tarbell who analyzed the current meter data. In all these cases the results are exceptionally good and it has been a pleasure to work with them. We also thank our Brazilian colleagues Anna Maria Scofano and Friedrich W. Herms and his students for assistance at sea. We received fine cooperation from Master Michael Dick of R/V Iselin and his crew and Master Carl Swanson of R/V Knorr and his crew, and we thank them all. Comments from referees greatly improved the final version of this paper. Thanks to Deborah Taylor for typing the manuscript. This research was supported by the Division of Ocean Sciences, National Science Foundation under Grant OCE91-05834.
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