Abstract
A series of step-layers, observed beneath the outflowing Mediterranean Water in the northeast Atlantic, were studied using a S.T.D. probe with expanded scale equipment. A region was established within which the vertical profiles showed 10 or more well-defined layers. Although it was possible to identify individual layers over distances at least as great as 30 nautical miles, closely spaced stations revealed the presence of discontinuities within the system. The layers beneath 1500 m displayed different characteristics to those above: the deeper layers were coherent over greater distances and showed only small horizontal variations of temperature and salinity. There was some evidence, from widely spaced stations, that the deep layers might have been coherent over distances greater than 50 nautical miles. The observations also suggest that the lifetime of the layers was at least several weeks.
Published Version
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