ABSTRACT 



in order to derive a method of predicting thermocline depth. 

 BT data and associated weather conditions at the Atlantic 

 Ocean Weather Station (OWS) CHARLIE (52°N, 35° W) were 

 studied. Selected groups of bathythermograms covering one 

 or several days were used to compute mean level of the 

 interface between the mixed layer and the thermocline. 

 Velocity and vertical extent of pure wind current are consid- 

 ered to be proportional to the surface wind -wave parameters. 

 A mixing parameter, k, which is a function of wave amplitude 

 A, wave length k, and mixed-layer thickness h, has been 

 determined from the BT groups and associated weather data. 

 Mixing parameter k is considered to be proportional to the 

 vertical component of the mixing length at the interface of 

 the mixed layer and the thermocline. As a function of sea 

 state parameter ^ and stability index At, mixing parameter k 

 is applied to mean thermocline depth prediction by use of 

 different functional curves for sea state in uniform current 

 flow or in convergent and divergent current conditions. 



