139 



However, since the northern part of the bay from the 

 Hyperion plant was covered by the Bureau of Sanitation, and 

 the southern part by the University, and since the patterns 

 resulting from the data in each section are continuous from 

 one area to the other, it appears definitely reasonable to 

 assume that the data as recorded are compatible and the 

 patterns as shown are real. Furthermore, it is believed that 

 had there been more opportunities when the two organizations 

 could have conducted other joint surveys of this nature, that 

 patterns of equivalent complexity would have been noted. 



It is immediately apparent that the surface and subsurface 

 topographies were almost identical on the 13th, with the nor- 

 mal departures expectable from, the submarine topography and 

 the variations in the external forces acting on the flow of 

 ocean water. The center of the cold dome of water is dis- 

 placed to the north in the subsurface water, for example, 

 and the thermal slope along its eastern boundary is more con- 

 tinuous and pronounced. The temperature slope indicating a 

 southerly flow nearshore in the surface layers is absent in 

 the subsurface layer chosen because the 55 F isotherm inter- 

 sected the sea floor seaward of the zone. Any flow estab- 

 lished by thermal slopes was, of course, south and out of the 

 bay in the offshore and southern areas. The indication of a 

 northerly flow in the lower layers in the central part of the 

 bay is not as well defined in the surface water, but the 

 tendency is still present. That such patterns and consequent 

 current action can and do exist is confirmed by data from the 

 log of the VELERO IV on this and other days. Course corrections 



