A bottom temperature map published in "Three Cruises of the Blake", Alexander Agassiz, 1888

A bottom temperature map published in “Three Cruises of the Blake”, Alexander Agassiz, 1888. p. 218. The majority of these temperatures were obtained by the CHALLENGER Expedition. The cold pool in the southwest Atlantic Ocean is indicative of no communication between the southwest and southeast Atlantic basins as the result of an obstruction - the Mid-Atlantic Ridge.

Photo Category: Historical Ships - Oceanography - Temperature