50 



reading of 35.8° were mistaken for 35.3°, the correct centigrade 

 potential temperature would have been 1.73° which would be much 

 more plausible. 



For years the source of the deep water of the North Atlantic has 

 been a much debated topic. The foregoing charts of deep level tem- 

 peratures (figures 41 and 43), the deep level current maps (figs. 49 to 

 51), and the bottom temperature charts (figs. 52 and 53), combine to 



Figure 54.— Dynamic topography at 800 decibars relative to 2,000 decibars. July 10- August 23, 1935. 

 Differences in anomaly of dynamic height expressed in centimeters. 



demonstrate the contribution of water from the Labrador Basin to 

 the deep water of the North Atlantic. They further support the 

 picture of the origin and circulation of the waters of the Labrador 

 Sea drawn by Smith, Soule, and Mosby in United States Coast 

 Guard Bulletin No. 19, Part 2. 



Lateral mixing. — As Wiist ^ has considered that in the region cov- 

 ered by this survey we have a source of North Atlantic intermediate 

 water which has a major southward component, it will be of interest 



» Die Stratosphare. Wissenschaftliche Ergebnisse der Deutehen Atlantischen Expedition auf Jem 

 Forschungs- und Vermessungsschiffe JV/e^eor, 1925-27. Band VI. ErsterTeil. Berlin. 1935. 



