NO A A PROFESSIONAL PAPER II 



40 60 80 100 120 140 160 180 



DISTANCE OFFSHORE (km) 



B 



41' 



40' 



39' 



"1 r 



J__l \ \ I L 



75 74" 73° 72" 



FIGURE 4-7A. — Nitrate concentrations during May 1975. XWCC cruise 4 transect I (A) and bottom (B) nitrate in p.g-at/1 (May 3-lU, 1975). 



102 



