The distribution of total phosphorus in all three sections is similar 

 to the inorganic phosphate. Values are not significantly greater than 

 for inorganic phosphate except in the surface and especially in the 

 coastal regions of strong currents, where a noticeable amount of 

 organic phosphorus is present. These values represent as mucli as 

 0.30 MgA/1 of organic phosphorus in the West Greenland Current and 

 the Labrador Current as seen in the two sections across the Labrador 

 Sea from Canada to Greenland. 



The distribution of nitrate is also similar to that shown for the 

 inorganic phosphate but less sharply deUneated. In the section from 

 South Wolf Island to Cape Farewell, values near the surface increase 

 to a concentration of 10.0 MgA/1 at about 100 meters (fig. 52). A 

 small peak of more than 15.0 MgA/1 occurs at about 300 meters but 

 with a patchy and sporadic distribution. In the deep water a nitrate 

 maximum of greater than 15.0 MgA/1 is observed in the same area as 

 the phosphate maxinmm was seen. The longitudinal section into 

 Baffin Bay (fig. 53) again points out the possible relation of this high 

 nitrate level to the water which escapes over the sill. A general 

 concentration of 10.0 MgA/1 below the surface is seen in the Baffin 

 Bay region, with increases to more than 20.0 MgA/1 in the bottom of 

 the basin. Some mixing of low nitrate surface water into the deeper 

 strata is suggested in the cross section from Loks Land to Fyllas Bank 

 (fig. 54). 



The distribution of nitrite is of importance only in the near-surface 

 waters, where it represents an important stage in the regeneration of 

 nitrogen. The nitrite distribution from the surface to 500 meters is 

 shown in figure 55, where the top drawing is the southern cross section 

 and the middle figure the northern section from Loks Land to Fyllas 

 Bank. In the bottom figure the longitudinal section is shown. It 

 will be noted that nitrite remains at a very low level in Baffin Bay 

 while elsewhere in all three sections a maximum value up to 0.40 

 MgA/1 is obtained near 100 meters. The nitrite concentration is 

 greatest in the northern cross section in the area oft' the Greenland 

 coast. 



The silicate distribution in general follows the same pattern as seen 

 in other nutrients. A sihcate maximum of concentrations greater 

 than 10.0 MgAA is found in deep water of the southern cross section 

 but not in the northern cross section except for a limited region near 

 the western slope (figs. 56, 58). From the longitudinal section (fig. 

 57) it is seen that the silicate levels within Baffin Bay show a consider- 

 able increase with depth. The level in subsurface water is over 10.0 

 MgA/1 but it is not clear how much of this is carried beyond the region 

 of the sill. A great accumulation of sihcate is seen in the bottom 

 waters within Baffin Bay. 



81 



