DEPTH IN METERS 
Gulf of California — Roden 
37 
of Cabo San Lucas and south of Cabo Cor- 
rientes aside, thus giving rise to the fronts 
observed. 
UPWELLING 
Upwelling in the Gulf can be expected 
along the east coast with northerly winds and 
along the west coast with southerly winds. 
So far only upwelling along the east coast 
has been investigated (Allen, 1937). 
The upwelled water is characterized by a 
low temperature and a low salinity when com- 
pared to the temperature and salinity of the 
surroundings. The surface oxygen content of 
the water is not necessarily a good indicator 
of upwelling, since it is strongly influenced 
by phytoplankton productivity, and by ex- 
change with the atmosphere. 
TEMPERATURE (°C) 
Fig. 14. Bathythermograph section from Cabo Corrientes to Cabo San Lucas, April, 1949. 
