is to be expected since such features often change considerably with 

 time. 



It should be kept in mind that the dynamic topography charts 

 are based on data collected over a short period of time, and therefore 

 it is quite possible that some of the current schemes presented by 

 earlier workers may be more representative of average conditions. 

 As Figure 6 shows, large temporal variations can occur within the 

 survey region. 



3. Salinity and Temperature Distributions in Arctic Bottom Water. 



Salinities in the nearly isohaline bottom waters were not appreciably 

 different than those encountered in the early part of the century. 

 However, a comparison of the temperatures encountered by the BELGICA 

 in 1905 (Due D'orleans 1907) with those encountered in 1964 indicates 

 that within the EDISTO survey area, minimum temperatures in the Arctic 

 Bottom Water were lower at the time of the BELGICA cruiset Also, 

 when nearby stations were compared (Table II) , there was a tendency 



TABLE II. Comparison of Arctic Bottom Water Temperatures Found at BELGICA 

 (1905) and FARM ( 1910) Stations with Those Found at Nearby EDISTO (1964) Stations 



Station 



Lat.°N 



Long. 





Temperature in ° 



r- 









800m 



1200m 



1594m 



" 1800m 



BELGICA- 15 



80°03' 



2°47'E 



-0.14° 



-0.72° 







-1 .06° 



EDISTO-42 



79°58' 



3°00'E 



0.03° 



-0.77° 



-0.97° 











800m 



1200m 



1800m 



2392m 



BELGICA- 17 



79°34' 



2°40'E 



0.00° 



-0.70° 



-0.95° 







EDISTO-41 



79°20' 



2°30'E 



0.21° 



-0.55° 



-0.84° 



-0.87° 









800m 



1200m 



1800m 



2350m 



BELGICA- 18 



79° 12' 



1°52'E 



-0.28° 



-0.74° 



-0.95° 







EDISTO-47 



79°00' 



2°30'E 



0.05° 



-0.59° 



-0.86° 



-0.93° 









800m 



1200m 



1800m 



2300m 



BELGICA- 19 



78°43' 



0°00' 



-0.34° 



-0.71° 



-1.10° 



-1.17° 



EDISTO-46 



79°00' 



0°00' 



0.0P 



-0.61° 



-0.87° 



-0.93° 









800m 



1200m 



1500m 



2300m 



FARM-21 



78°08' 



0°35'W 



-0.57° 



-0.93° 



-1.04° 



-1.19° 



EDISTO-3 



78°08' 



0°00' 



-0.56° 

 800m 



-0.88° 

 1200m 



-0.97° 



-1.01° 



FARM- 18 



79°03' 



5°02'E 



-0.59° 



-lo02° 







EDISTO-48 



78°40' 



5°08'E 



-0.02° 



-0.81° 







Within the EDISTO survey region, the minimum bottom water temperature encountered by the 

 BELGICA was »-l .25°C, whereas the coldest bottom water temperature found during the EDISTO 

 survey was -1 ,01°C . 



35 



