ABSTRACT 



BT data from five ocean weather stations in tiie western North Atlantic were 

 used to develop equations for time distribution of mean temperatures at the 

 400-foot level. Given variables in the equations are mean annual surface 

 temperature and annual amplitude (half annual range) of surface temperature; 

 both are plotted on individual charts. Other variables, such as reduction of 

 mean annual temperature at 400 feet with respect to the surface, reduction 

 of annual temperature amplitude at 400 feet with respect to the surface, 

 and phase angle at 400 feet are given as functions of latitude. Four equations, 

 suitable for certain areas of deep water beyond the continental shelf above 

 20°N in the North Atlantic, are presented. 



The actual temperature at 400 feet is computed by adding the surface tem- 

 perature anomaly to the mean temperature at 400 feet if anomalies at the 

 surface and 400 feet are correlated or by adding the specific anomaly at 

 400 feet to the mean temperature at 400 feet if anomalies at the surface and 

 400 feet are uncorrelated. 



