. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. 164 bulletin: museum of comparative zoology, Bottom temperature. The chart of bottom temperature (Fig. 8) illus- trates the localization of cold bottom water on the mid-zone of the continental shelf south of Long Island and Marthas Vineyard in July, the southern boundary of which must have been somewhere between the latitude of New York and the line off Barnegat. Shore- ward as well as seaward, the bottom water was warmer than 45°. That this should have been the case nearer land was to be expected, because of the stea
. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. 164 bulletin: museum of comparative zoology, Bottom temperature. The chart of bottom temperature (Fig. 8) illus- trates the localization of cold bottom water on the mid-zone of the continental shelf south of Long Island and Marthas Vineyard in July, the southern boundary of which must have been somewhere between the latitude of New York and the line off Barnegat. Shore- ward as well as seaward, the bottom water was warmer than 45°. That this should have been the case nearer land was to be expected, because of the steady shoaling of the water. But the fact that the bottom water was warmer (50°-51°) between 50 and 125 fathoms. Fig. 10.— Temperature profile across the outer part of the continental slope southwest of Nantucket (Stations 10063, 10062, 10061). than at 35-50 fathoms, would have been a surprise had not a similar phenomenon been encountered by Libbey (1891) south of Marthas Vineyard in 1889 (p. 241). As pointed out (p. 165) this cold bottom water was not continuous with the cold water in the Gulf of Maine, being interrupted on Nantucket shoals, where the bottom tempera- ture is raised, and the surface correspondingly chilled, by vertical tidal mixing. But no doubt, in winter, the cold water is continuous across the shoals. On the continental slope the temperature was 45° at about 200 Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Harvard University. Museum of Comparative Zoology. Cambridge, Mass. : The Museum
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