ESTUARINE MODEL OF SUB-ARCTIC PACIFIC OCEAN 



433 



SALINITY {%„) STRUCTURE ALONG LONGITUDE 140° W. 

 August, 1955 



56 S8 60 



SALINITY (SX.) STRUCTURE ALONG LONGITUDE 156- W (Approx) 

 Jul» - August. 1955 (NORPAC) 



SALINITY STRUCTURES ALONG LONGITUDE I57*W 



Fig. 4 



A representative distribution of fresh water in the eastern sub- 

 Arctic Pacific is shown in Fig. 6. This varies from about 3 m in the 

 vicinity of the sahnity maximum in the Gulf of Alaska (Figs. 3 

 and 4) to about 5 m near the coast. Two features of this distri- 

 bution are of interest. The average depth of fresh water is about 

 3.5 m, and the average rate of input is about 0.6 m per year 

 (Fig. 5). Hence the average time of transit through the sub-Arctic 

 region, as a whole (Fig. 4), must be about six years. 



