Nearly 4 million ship drift report from 1900 through 1972 have been summarized in squares of 5¿ latitude ¿10¿ longitude for the oceans of the world and separately in 5¿¿5¿ squares for the North Pacific. The averages for the squares have themselves been averaged to provide mean latitudinal values of the components and their standard deviations. This has been done for each of the four seasons and for the year. The resulting profiles of these values reveal such features as the equatorial countercurrent and show how it changes with season. Profiles of the first differences of the v component reveal the latitudes of upwelling and downwelling. |