Figure 1 1 B . Vertical Distributions of Nitrate and Reactive Silicate 

 For Cross Section of Stations 3 to 22. 



4. Horizontal Charts. 



Figures 12 through 25 present the horizontal distribution of 

 salinity and temperature at various levels. When data from an observation 

 depth did not correspond to a selected level, interpolated data were 

 used. As in the case of the vertical sections, the data were contoured 

 as if they were synoptic. Consequently, the 'pinched' nature of 

 some of the isopleths between stations 35 and 42 may be partially 

 due to their being occupied 11/2 days apart. Only stations for 

 which data were available to the depth of a given level have been 

 indicated on the charts depicting conditions at that level. Although 

 stations 1 and 50 were taken at approximately the same location, 

 only the data from station 1 were used in constructing these diagrams. 



A. -and 10-meter levels: Conditions at and 10 meters (Figs. 

 12 through 15) were quite similar. Perhaps the most outstanding feature 

 at these depths was the thermal 'front' (sometimes called the Polar 

 Front) found in the central and western portions of the survey region. 

 This ' front ' marks the boundary between the warm waters carried north 

 by the West Spitsbergen Current and the cold waters of the East Greenland 

 Current. The waviness of the isotherms suggests the presence of 

 large meanders or vortices. 



22 



