This study was finished when F. Vauclair was funded by the FAPESP (Grant 01/10585- 9) at the University of São Paulo, Brazil. Funding by PNEDC is gratefully acknowledged. The study relied on the availability of in situ data collected on VOS XBT lines, PIRATA moorings, ACCE profiling floats, and during several oceanographic cruises. Comments by B. Bourles, I. Wainer, and the reviewers were very valuable in improving the paper.
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