FISHERY BULLETIN: VOL. 80, NO. 2 



Figure 1.— Seasonal changes in seawa- 

 ter temperature at 10 m intervals at Sta- 

 tions A-D during September 1978-May 

 1980. For simplicity 2 yr of data have 

 been pooled and are presented on a sin- 

 gle annual cycle. 



I l^l I I I I I I 1 L 



JFMAMJJASOND JFMAMJJASOND 



MONTH 



O SURFACE 

 • 10 m 

 A 20 m 



A 30 m 

 D 36 m 

 O 40 m 



 42 m 



 48 m 



* ALL DEPTHS 



STATION 



10 



20 



ft. 



Uj 30 



40 



50 



TEMPERATURE °C 

 AUGUST 31 , 1979 



DISSOLVED OXYGEN^ 

 % SATURATION 



90 70 50 

 I 1 1 1 1 1 



r- » 



10 



15 



41°13' 41 11' 41" 09' 4V07' 41°05' 41°03' 41°or 



LATITUDE °N 



Figure 2.— Water column temperature structure along the 

 transect from Stations A to D, 31 August 1979, illustrating the 

 intense thermocline and its intersection with the bottom. 



Figure 3.— Vertical profiles of percentage saturation of dis- 

 solved oxygen and pH at Station D for April (o) and August (•). 



318 



^ 20 



P~ 25 



Si 



30 



35 h 

 40 



45 

 48 



• ' 



• 9 



• 9 



Y 



cm 



PH 



8 20 810 80 

 I 1 1 1 1 1 



B 



