w 



ZOOPLANKTON BIOMASS 



W 



FISHERY BULLETIN: VOl- 86, NO 1 



W 



2 



1 .0 



o 

 ■o 



c 

 o 



to 



I - 



- 2 



Year 



Figure 5. — Time series estimates of quarterly zooplankton biomass values from northern Chile 

 (18°-24°S), 1964-73, standardized accordmg to the long term standard deviation. W = warm 

 years; C = cold years. From Bernal et al. 1983. 



SEA SURFACE 

 ATMOSPHERIC PRESSURE ANOMALIES 



3 - 



3 - 



I960 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 



Year 



Figure 6. — Sea surface atmospheric pressure anomalies off of (A) Arica (18'Sl and (B) Iquique (20''Sl, 1960-82. From 



Kelly and Blanco 1983. 



20 



