underseas extension of the extremity of Baja California. This 

 corresponds to the water-mass boundary between the Gulf of 

 California Water and two other bodies of water, the California 

 Coastal Current Water and the Tropical Pacific Water. 



Log-log plots of power spectra averages for each of the 

 shallower and deeper isotherms result in nearly straight lines. 

 A small change in slopes occurs around 0. 15 cycle per minute 

 (cpm) for both curves and 0.30 cpm for the shallower curve. The 

 overall slopes appear to be near -5/3, which may mean that the 

 thermal structure is partly a turbulence phenomenon in the 

 frequency range between 0.05 and 0.30 cpm. 



73 



