45 



60° 120° 180° 120° 60 



Figure 21. Wind-stress field used as an upper boundary condition for testing global ocean nnodel. 



current in the South Pacific is associated with the Mid-Pacific Rise. There 

 is also a pronounced southward displacement where the Circumpolar Cur- 

 rent is forced through a narrow gap south of New Zealand. 



During the last 2 years, the oceanography group at the Geophysical 

 Fluid Dynamics Laboratory has systematically compiled three-dimensional 

 fields of temperature and salinity for the world ocean based on the Na- 

 tional Oceanographic Data Center's files on 500,000 hydrographic stations. 

 Although these data are unevenly distributed in both space and time, the 

 NODC file is a valuable source for both input and verification of the world 

 .oceaii xopdei. A method of objective interpolation has been worked out to 

 compile temperature and salinity fields on a regular three-dimensional 

 grid. Using these synthetic synoptic data as input to the world ocean 

 model, it is possible to carry out diagnostic calculations to find a velocity 



