The stations (38 through 61) upon which these calculations are based were taken 
south of the Convergence zone and north of the Divergence zone. They are located 
in the transition zone between the surface West Wind Drift to the north and East 
Wind Drift to the south. These stations were taken within a 10-day period, from 
27 January to 5 February 1961. 
A dominant feature at all surfaces is the strong counterclockwise circulation in 
the eastern side of the area (Figs. 16 through 18). The 2,000-fathom line passes 
generally through the western edge of this cell, with greater depths to the north and 
east. This cell increases in size from the bottom to the 250-decibar surface. From 
this surface to the zero-decibar surface, it is not as distinct and is displaced slightly 
to the northwest. 
In the western sector of the area, another cell with a counterclockwise circula- 
tion is apparent at all levels. This cell increases in magnitude from the surface to the 
250-decibar surface. Below this, it decreases to the 500-decibar surface, and increases 
to a maximum at the 1000- and 1500-decibar surfaces. This counterclockwise circula- 
tion then decreases to a small cell at the 2000-decibar surface. 
Between these two major cells, a clockwise circulation is evident at all levels. 
In contrast to the two major counterclockwise cells, this clockwise circulation decreases 
from the surface to the 1500-decibar surface, where it appears as a very small cell. 
From this level to the 2000-decibar surface, it increases to its maximum size. 
South of these three cells, a southeasterly transport is evident at all levels west 
of approximately 109°W. This transport then shifts to the northeast and continues to 
the easternmost sector of the area. 
D. Bellingshausen Sea Area 
1. General 
The Bellingshausen Sea is located between Thurston Island on the west and 
Palmer Peninsula on the east. The eighteen stations occupied north of Thurston Island 
and in western Bellingshausen Sea were in relatively shallow water; station 79, located 
between the Amundsen and Bellingshausen Seas, was the deepest in the area, with a 
depth of 2,300 meters. Station 68 was taken at the edge of heavy impenetrable shore- 
fast ice. The period of observation was 7 February to 9 March 1961. 
Vertical distribution of observed physical and chemical properties in the Bellings- 
hausen Sea is presented in four cross-sections, Figures 19 through 22. Bottom contours 
in these sections were constructed from wire soundings at the stations. 
28 
