SALINITY 



(%o) 



10.0 



33.8 



__l 



34.0 



I 



34.2 

 I 



34.4 

 I 



34.6 

 l__ 



STATION NUMBERS 

 COBB SEAMOUNT '? '.^ f '.^^ '.^ "l^l^I^" W.LLAPA BAY 



Figure 23. — Temperature vs. salinity curves for water of salinity greater than 33.8%o 

 Willapa Bay and Cobb Seamount, fall 1963. 



between 



of the tongue. During spring the 6.0° C. iso- 

 therm was discontinuous off southern Van 

 couver Island (fig. 24) where the geostrophic 

 currents indicated onshore movement (fig. 4). 

 The distribution of temperature greater than 

 6.0° C. showed a band of more southern water 

 about 40 km. wide seaward of the Continental 

 Shelf. 



The configuration of the isotherms on 

 34.0%o surface was generally similar to the 

 geostrophic currents at 200 m., and the south- 

 ern water mass was located to the right (if one 

 faces downstream), even when the current was 



southbound. 



The greater area encompassed by the south- 

 ern water (> 6.0° C.) off the coast of Wash- 

 ington during the fall suggests that the north- 

 ward flow was greater during fall (fig. 25), 

 but the increased flow was not reflected in the 

 net volume transport. 



A more quantitative approach to the de- 

 scription of the distribution of water masses 

 along the Pacific Coast of the United States 

 was made by Tibby (1941) who applied the 

 method of Sverdrup and Fleming (1941) to 

 data obtained by the E. W. Scripps in 1939. 



246 



U.S. FISH AND WILDLIFE SERVICE 



