NO. 4 TEMPERATURE VARIATIONS IN THE NORTH ATLANTIC 



9 



ture anomalies for this field (see table 4W and pi. 15, 29). These 

 values could hardly be regarded with very great confidence on 

 account of the small number of available observations. 



Figure 2. The surface currents of the Atlantic Ocean in the northern 

 winter according to Schott : Geography of the Atlantic Ocean. Full drawn lines 

 indicate warm currents, the dotted lines cold or cool currents, dotted regions 

 are regions of prevailing side streaming, circles indicate regions of prevailing 

 slack water, crosses indicate regions with up-flowing cold water from the 

 depths. Curve I gives the average boundary of the drifting ice and of the 

 icebergs, curve II the outside boundary of icebergs of extraordinarily cold 

 years, curve III the region of the prevailing presence of Gulf seaweed. 



III. SURVEY OF THE REGION INVESTIGATED 



The greater part of our region of investigation is ruled by the 



great oceanographic phenomenon called the Gulf Stream. The 



principal features of the surface relations of the ocean currents 



are given approximately in figure 2. The Labrador current with 



2 



