the surface to 50 meters there was a slight de- 

 crease in salinity, and between 50 and 100 

 meters there was a slight inversion. The lower 

 limit of the halocline was at about 800 meters. 

 The surface salinity had reached a maximum 

 during this patrol (Figure 16). However, it is 

 felt that the maximum salinity might occur 

 later in August. 



During the September-October 1967 patrol 

 of the USCGC MCCULLOCH at ocean station 

 ECHO the surface salinities had decreased. 

 However, there was a noticeable increase in 

 salinity between the depths of 100 and 900 

 meters. 



Figure 18 shows the temporal variation of 

 temperature at 100 meter intervals during the 

 five patrols at ocean station ECHO between 21 

 September 1966 and 13 October 1967. During 

 the September-October 1966 cruise of the 

 USCGC YAKUTAT the largest daily variation 

 in surface temperature was 1.27° C. between 

 September 23 and 24 which may have resulted 

 from the time of day the casts were taken. A 

 1.26° C. temperature difference occurred be- 

 tween September 21 and 22. This could be due 

 to spatial variation since similarly high tem- 

 perature values were noted from a station 

 taken in the same general area in February 

 1967. However the possibility that this is due 

 to advection can not be overlooked. It is ap- 

 parent that there was a tendency for the 

 temperature throughout the water column to 

 increase through September and into October. 

 Daily variations of surface temperature of 

 about 0.60° C. was the largest encountered dur- 

 ing the February 1967 patrol of the USCGC 

 MCCULLOCH. Larger daily variations (as 

 high as 1.68° C.) were observed between 200 

 and 1000 meters. These variations would have 

 to be due to spatial effects since they extend 

 well below the limits of the surface effects. 



The exceptionally cold water on 2 June 1967 

 is the predominant feature of the USCGC 

 ANDROSCOGGIN'S occupation of ocean sta- 

 tion ECHO. 



When the USCGC ABSECON began its occu- 

 pation of ocean station ECHO in July 1967, the 

 temperatures below the 100 meter level were 

 lower than those temperatures observed at the 

 end of the previous patrol. The temperature 

 then increased with time throughout the water 

 column with the largest temperature increase 



for the patrol occurring between 400 and 700 

 meters. The maximum variation was 3.72° C. 

 at the 600 meter level as compared to 1.28° C. 

 variation at the surface. 



Late September and early October 1967 re- 

 vealed higher temperatures at all levels below 

 25 meters over the previous patrol and tem- 

 peratures decreasing with time. The largest 

 daily variation of temperature occurred be- 

 tween 600 meters and 1100 meters. 



Figure 19 shows the temporal variation of I 

 salinity at 100 meter intervals during the 

 five patrols at ocean ECHO between September 

 1966 and October 1967. During the patrol of 

 the USCGC YAKUTAT, the surface had low 

 salinity values. Between 200 and 800 meters 

 there was a high degree of correlation between 

 temperature and salinity. Below 800 meters 

 the temperature-salinity correlation still ex- 

 isted, but not to the same degree. This was ; 

 the case during all of the patrols. The largest 

 daily variation of salinity was 0.30%,, at the 

 400 meter level between September 21 and 22. 

 These large variations occurred down to 700 

 meters, and could be due to the spatial variation i 

 of the stations. This was also a predominant 

 feature in the corresponding plot for tempera- 

 tui-e. Other abnormal variations occurred at 

 the 900, 1000, and 1100 meter levels between 

 October 11 and October 13. Upon close in- 

 spection of the data it appears as though this 

 is due to bad data and is not a true represen- 

 tation of the salinity. There was no correspond- 

 ing variation in temperature between these 

 dates. 



During February 1967, the surface salinity 

 had increased and displayed isohaline condi- 

 tions to a depth of 200-250 meters. Between 

 250 and 900 meters large daily variations in 

 salinity were the rule rather than the ex- 

 ception. These variations appear to be due to 

 both spatial variations and lateral motion of 

 water masses. 



In June spatial variation of salinity was 

 again evident as it was with temperature. The 

 salinity values at stations No. 1 and No. 2 

 were considerably lower and those at station 

 No. 11 were higher than those of other stations. 



The surface salinity during July-August 

 1967 was higher than during the previous 

 patrol, but lower values were recorded between 



