shows the locations and sequence of 1& of these stations* Station 18 

 lies off the chart north of Cape Bird. Stations 7, 15* 16, and 11, 

 taken 31 January to 1 February, were selected to represent a west-east 

 transect across McMurdo Sound. Of these, stations 7 and 15 were taken 

 when ice was present, whereas 16 and 11 were taken in open water. 

 Figure 7 presents the vertical distribution of temperature, salinity, 

 and density for these stations. 



a. Temperature 



The extremely low temperature structure in McMurdo Sound is 

 readily seen in Figure 7« Throughout the water column, all values were 

 less than 0.00 "(J. Summer warming of the surface layer is evident at 

 stations 11 and 16, where slight negative gradients were formed. The 

 local effects of melting ice at stations 7 and 15 resulted in the very 

 low surface temperatures and resultant positive gradients. Below this, 

 temperatures decreased gradually to values as low as -1.93*0 near the 

 bottom at the deeper stations. 



b . Salinity 



The low surface salinities occurring at stations 7 and 15 are 

 due to melting ice; values at stations 11 and 16 are normal for the open 

 areas . 



c. Density 



The density pattern parallels that of salinity; values were 

 slightly lower in areas of ice and higher in the more open waters. Low 

 temperatures and high salinities account for the high density values of 

 greater than 28.00 near the bottom at the deeper stations. 



3. Western Ross Sea 



From 1 to 6 January, ATKA. conducted a series of oceanographic 

 stations to the west of Scott Island in an area bounded by 65° to 69 °S 

 and 175 *E to 180° (Fig. 2). Because of the vertical sampling interval, 

 no cross sections have been prepared. The tabulated data, however, are 

 presented in APPENDIX A. These data show a similar physical structure 

 to the stations taken across the Balleny Basin by EASTWIND (Fig. 6). 



k. Ross Ice Shelf 



Six oceanographic stations were taken in the vicinity of the Ross 

 Ice Shelf by GIACIER from 13 to 17 December 1959. Three of these were 

 taken along a northwest to southeast track to the shelf and the other 

 three closely paralleling the shelf edge (Fig. 2). Throughout the area, 

 temperatures were less than 0°C. Surface values ranged from -0.1*0°C, at 



15 



