C. 100-meter level ; A thermal 'front' was still present at 

 100 meters, but the horizontal temperature gradients were weaker, 

 and shapes of the isotherms (Fig. 17) were often quite different 

 than at 0, 10, and 50 meters. The -1°C isotherm indicates that at 

 this level relatively warm water may be flowing into the western 

 portion of the survey region from the northeast. 



Salinities at 100 meters (Fig. 18) displayed the same tendency 

 to decrease towards the west as was found at and 10 meters. However, 

 the maximum horizontal salinity gradients were not as great as those 

 in the upper levels, and the largest gradients were found west of 

 the Polar Front. 



Figure 17. Horizontal Temperature 



Distribution at 100 Meters. 

 Contour Interval - 1°C. 



Figure 18. 



Horizontal Salinity 

 Distribution at 100 

 Meters . Contour 

 Interval- 0.5%„. 



D. 200 -meter level : One of the more interesting aspects of 

 the temperature distribution at 200 meters (Fig. 19) is that all 

 of the temperatures are greater than 0°C. Since the boundary between 

 the cold waters of the East Greenland Current and the relatively 

 warm waters of the Return Atlantic Current is usually taken to be 

 the 0°C isotherm, it is clear that this boundary was between 100 

 and 200 meters throughout the entire survey region. 



Maximum temperatures were again found close to Svalbard, but 

 they were noticeably colder than at 50 and 100 meters, indicating 

 that the 'core' of the West Spitsbergen Current probably lay above 

 the 200-meter level. As in the upper layers, a strong tendency for 

 isotherms to turn east near northern Svalbard can be noticed. 



25 



