ESTUARINE MODEL OF SUB-ARCTIC PACIFIC OCEAN 



445 



10 



T-S Relation* 

 In tha 

 Sub- Arctic 

 Pacific Ocean 



General Classifications 



(Dodimaad, 1958) 



32.8 33.0 33.2 334 33.6 33.8 34.0 34.2 34.4 34.6 

 Salinity (■/..) 



Fig. 8 



by Dodimead (1958) as shown in Figs. 8 and 9. Here the water 

 masses in the halocline were classified arbitrarily according to the 

 temperature level in the halocline as shown in the first diagram, 

 and their distribution in the region was deduced from the data as 

 shown in the second diagram. By comparing this with the corre- 

 sponding halocline (temperature on salinity 33.8%c) plot, for 

 August 1956 in Fig. 10, it is evident that the interpretations 

 coincide in every important respect. Perhaps for this purpose this 

 halocline plot is preferable to the conventional T-S interpretation 

 in Fig. 9 since it requires no arbitrary definitions, and provides 

 single-valued numerical indices of the waters. 



The sequence of diagrams in Fig. 10 shows a progressive north- 

 ward intrusion of relatively warm water (shaded) past the Cana- 

 dian coast through 1957 and 1958. These may be compared, 

 regardless of season, because the data are everywhere below the 

 level of seasonal influence. 



