CHAPTER 4 



4rrn — r 



"1 I r 



40' 



39' 



J 1V_J \ I I \ \ I I I I I 



J L 



J \ L 



75° 



74° 



73° 



72° 



41' 



40' 



39' 



1 \ I r 



B 



J \ L 



75 74" 73" 72" 



FIGURE 4-13. — Ammonium concentrations of bottom (A) and surface (B) waters September 11 to 17, 1976. XWCC cruise 11 values in (ig-at/l. 



Ill 



