rivers. It is hoped that these calculations will give new insight into the 

 global heat balance by providing an independent check on the extremely 

 divergent estimates previously derived from atmospheric data. 



Once diagnostic calculations of the circulation pattern have been com- 

 pleted, the next phase will be to use the model in a fully predictive mode. 

 The fields of temperature and salinity, as well as the velocity field, will be 

 predicted for the world ocean. Calculations will be made to determine the 

 equilibrium adjustment of both the density and velocity fields to a given in- 

 put of momentum, heat, and water transport at the surface. These calcula- 

 tions will develop the full potential of the numerical model. Observed sub- 

 surface temperature and salinity fields will be used for verification. The 

 degree to which the model predicts existing details of the temperature and 

 salinity structure will give an evaluation of its usefulness in forecasting 

 climatic changes caused by natural and artificial alterations of the earth's 

 environment. 



48 



