/C3i 



WO 



i.n 









^ ^ ^ * fi g 



^ 



+ A £i 



/^ 



cal/cn-'day 



iKyi>' <? 



7^ 



/J" 



i C 



Fig. 5. Comparison of energy of irradiation optimal for AN (Eq^), with 

 incident radiation (Einc) (s) ^nd temperature (t,°C) at optimum depth 

 (b) : a: 1, optimum An at surface; 2, station with stratified water; 3, 

 station with mixed water or without hydrologic data; b: 1, optimum AN 

 at surface; 2, other stations. 



C, mg/a 



WOO 



■}£0 - 



■ti-i 



t fo 



S 1.0 



0.1 



fj/ 



P,l 1,0 10 IPP JCCP 



Fcnecratiag raJlatton, . 



al/c:i 



• day 



Fig. 6. Light curves of photosynthesis of phytoplankton in the tropical 

 area: a--photosynthesis , mg C/m-^'day; b--same, % of maximum. Abscissa 

 shows penetrating radiation, ca1/cm^«day. Primary production at 

 surface, mg C/m^-day: 1, < 2; 2, 2-5; 3, 5-10; 4, 10-100; 5, > 100. 



240 



