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An examination of existing data sources clearly shows that the methods utilized to determine the principal characteristics of ocean currents leave much to be desired. From the many and varied types of information, currents have been identified on the basis of faunal zones, increase or decrease in temperature or salinity, changes in water color, exchange of heat and water vapor with the atmosphere, cloud cover, mixing, dilution by rain, river discharge, heating and evaporation, Coriolis force, distribution of organisms, etc. It is agreed that all these factors, to varying degrees, can help to distinguish the currents, but it also appears that the importance of these factors, when stressed individually, can be greatly exaggerated. The currents shown in Figure 1 and described in this report are those where the movement within specified boundaries exhibits a definite permanent or seasonal flow. The approximate boundaries and the main body of each major current shown are based on ship drift observations and direct measurements by instrument, which describe the two main features of the current, namely direction and speed. (Author).
Ocean Currents
Excerpt from Navigation of the Atlantic Ocean: Containing a Brief Account of the Winds, Weather, and Currents, Prevailing Therein According to the Most Experienced Authorities In order to consider the winds common to this ocean, we shall divide it into three regions: the first, that com prised between the parallels of 30 N orth and South latitudes; the second between the latitude of 30 South and the South pole; the third between 30 N orth and the N orth pole. We shall divide each of these twe last named regions into two zones: the temperate zone, ex tending from the parallel of 30 to and the frozen zone between the latitude of 60 and the poles. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.