Riley (1955b), which depends upon the develop- 

 ment of a molybdenum blue complex in acid solu- 

 tion after oxidation with metol-sulfite-oxalate 

 solution. Samples were read at 882 nut on a DU 

 spectrophotometer. 



Profiles of the data for the sections in the Kane 

 Basin, Smith Sound, and Baffin Bay are given in 

 which the distribution of each nutrient measured 

 is indicated by smooth contours, omitting any 

 questionable points. The profiles are grouped by 

 area to form a series of figures for each determina- 

 tion. A longitudinal section which intersects the 

 east-west profiles is also given to indicate the dis- 

 tribution from the mouth of the Kennedy Channel 

 to the deep water of Baffin Bay. Exact placement 

 of the individual sections may be obtained from 

 the map of station positions or the station data, 

 given elsewhere in this publication. 



We wish to acknowledge the assistance of the 

 Coast Guard Oceanographic Unit in the prepara- 

 tion of the figures; and to thank all personnel for 

 their cooperation in every phase of this study. 



Distribution of Nutrients 



Inorganic Phosphate (figs. 32 through 25). 



The range of concentration for the inorganic 

 phosphate in the Kane Basin is relatively small. 

 Values at the surface are about 0.50 /ugA/1, with 

 a minimum surface concentration of less than 0.40 

 /xgA/1 extending out from the Greenland coast in 

 the northern sections. A concentration of more 

 than 1.00 /igA/1 occurs in each section but is usually 

 restricted to an area near the coasts. In the most 

 northern profile (fig. 32a), this maximum value is 

 found near 100 meters at the western end and at 

 200 meters at the eastern end of the basin. Con- 

 tour values slope downward toward the east, al- 

 though a small region of high concentration occurs 

 near the bottom at the western side of the basin. 

 The inorganic phosphate maximum in the center 

 of the Kane Basin (fig. 32b) is found at about 

 100 meters on the eastern side of the basin and 

 shows an increased extent away from the edge of 

 the basin; a very restricted maximum is also seen 

 at 50 meters along the western edge. The down- 

 ward slope of values eastward is less pronounced 

 in this section. At the southern end of the Kane 

 Basin, the inorganic phosphate maximum extends 

 across nearly the whole area at depths from 50 

 meters to 200 meters (fig. 32c). A pocket of re- 

 duced values appears on the eastern slope, while 



high phosphate concentrations are found in the 

 deepest water, close to the rugged bottom 

 topography. 



The areal extent of the inorganic phosphate 

 maximum increases in the sections from Smith 

 Sound southward, but the value of the maximum 

 concentration remains only slightly above 1.00 

 jugA/L The section from Gale Point to Cape 

 Alexander (fig. 33a), composed of only two sta- 

 tions, shows a restricted maximum near 100 meters 

 along the Greenland coast and a general value of 

 0.80 ftgA/1 in the subsurface water. In the next 

 section (fig. 33b), the inorganic phosphate maxi- 

 mum is confined to the region of the deep basin 

 and does not extend into the more shallow waters 

 of Murchison Sound, represented by station 8777. 

 Subsurface values are about 0.90 /xgA/1, with the 

 lowest subsurface reading being obtained at sta- 

 tion 8775 on the western end of the section. Be- 

 tween Cape Combermere and Cape Parry (fig. 

 33c) the inorganic phosphate maximum of 1.00 

 /itgA/1 does not appear until a depth of 200 meters 

 and then extends to the bottom of the basin at more 

 than 500 meters. The highest values occur from 

 200 to 400 meters at station 8778. Low deep-water 

 values are seen on the western end of the section, 

 between stations 8779 and 8780. 



The cross section from Cape Norton Shaw to 

 Cape Atholl (fig. 34) has the inorganic phosphate 

 maximum as a wide band across the whole profile 

 at a depth of 100 to 300 meters. A value of more 

 than 1.20 /*gA/l is found in the eastern part of the 

 section at stations 8787 through 8789. A concen- 

 tration of more than 1.00 /igA/1 occurs in the deep 

 water near the bottom of the eastern part of the 

 section. A region at a depth of 300 to 500 meters 

 where phosphate values are less than 0.90 /igA/1 

 separates these two areas of high concentration. 



The relative differences in inorganic phosphate 

 distribution from the Kane Basin to the deep 

 water of Baffin Bay can be seen in the longitudinal 

 section ( fig. 35) . The value of the phosphate max- 

 imum gradually increases. The deep water of 

 Baffin Bay, as seen at stations 8791 through 8793, 

 shows its highest phosphate level on the edge of 

 the basin. The concentration of 1.20 /xgA/1 oc- 

 curring between 600 and 800 meters in these sta- 

 tions seems to relate most directly to the phosphate 

 maximum at station 8787 which reaches 1.20 ^igA/1 

 at a depth of 300 meters. The range of values 

 from surface to bottom is greater in Baffin Bay 

 than in the Kane Basin. 



38 



