TEMPERATURE °C 



1/1 



en 



Q. 



LlJ 



N0 3 -N, yugAt/ LITER 



20 





N0 2 -N ljU gAt/LITER 



30 12 3 4 5 6 7 8 



i t - 1 i i i i i i i 



NH 4 -N, /ugAt/LITER 

 12 3 4 5 6 7 8 9 



• STATION 16 

 ■ STATION 17 

 o STATION 21 



Figure 45. — Profiles of temperature and nutrients at location C-5 (intensive site) off Peru, 15°S, April 1-3, 1976. 



20 



\\ 



ik // . \ V/ / . . wk pta Lomos \ . \ . • 



TEMPERATURE (C) NITRATE {pg at/I) CHLOROPHYLL A 



((jgm/l) 



Figure 46. — Distribution of temperature, nitrate, and chlorophyll 

 around the Cabo Nazca site, where the intensive 

 JOINT-II studies were located. The alongshore and 

 offshore expansion of the traditional Cabo Nazca 

 upwelling center emphasizes the strength of the up- 

 welling in 1977 as compared with data from the 

 same months in previous years. 



75 



