Annual report of the Board of Regents of the Smithsonian Institution . he thesis that the movement of the waters of the Kriimmel, op. cit., Vol. 2, p. 441. 8 E. Le Danois: Etude hydrologique de IAtlantique-Nord, Annates Inst. Oceanographique, Vol. 1CN. S.), pp. 1-52 ,1924. 300 ANNUAL EEPORT SMITHSONIAN INSTITUTION, 19 2 9 North Atlantic consists of two currents—a circumpolar current andan equatorial current—and various so-called transgressions, by whichname he denominates slow periodic movements of the water of thenature of long-period tidal movements. The Gulf Stream in parti-cular he reduces
Annual report of the Board of Regents of the Smithsonian Institution . he thesis that the movement of the waters of the Kriimmel, op. cit., Vol. 2, p. 441. 8 E. Le Danois: Etude hydrologique de IAtlantique-Nord, Annates Inst. Oceanographique, Vol. 1CN. S.), pp. 1-52 ,1924. 300 ANNUAL EEPORT SMITHSONIAN INSTITUTION, 19 2 9 North Atlantic consists of two currents—a circumpolar current andan equatorial current—and various so-called transgressions, by whichname he denominates slow periodic movements of the water of thenature of long-period tidal movements. The Gulf Stream in parti-cular he reduces to a mixture of the equatorial current with thetidal current from the Gulf of Mexico, which tidal current he men-tions as being violent. This tidal current—the true Gulf Stream-is compelled to move into the open sea by the presence of the lastwaters of the Labrador Current which skirt the coast of the UnitedStates (p. 19). Now there are data at hand, as we shall see later, which completelydisprove the existence of violent tidal currents in the Gulf of Figure 7.—Isotherms of the surface waters, North Atlantic Ocean. (Adapted from Schott) Moreover, in characterizing the current in the Straits of Florida as atidal current Le Danois must have in mind something quite differentfrom what is commonly understood by the term, namely, a periodicforward and backward movement of the water with a period of halfa day or a day. And in invoking the presence of the Labrador Currentalong the coast of the United States he surely does not strengthen hiscase; for, as we have seen, the view that the Labrador Currentreaches the coast of the United States is no longer tenable. The reality of the movement of the water from the lower latitudesof the western North Atlantic to the higher latitudes of the eastern THE GULP STREAM MAEMER 301 North Atlantic is not only evidenced by a chart of the currents butis also clearly indicated by the temperature of the surface Figure 7 the is
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