that this warming is advective and is part of a Gulf Stream meander. 

 Several isolated deep warm cells occurred south of the Gulf Stream in 

 both phases, and the warm eddy had deep layer depths during phase II. 



A persistent feature south of the Gulf Stream, the relatively 

 shallow area (<30 meters) near 38°N between 65°W and 67°W, indicates 

 a slow-moving countercurrent which is influenced significantly by the 

 weather. This region has cooled slightly (1°C) during the survey, thus 

 the layers would be expected to be deeper in phase II. 



SUWARY 



The fine structure and water mass movements in the Gulf Stream 

 region were shown through these surveys. Wave-like motion of the north- 

 ern boundary of the Gulf Stream wall was demonstrated, shallow warm and 

 cool filaments were located immediately north of the stream, a major 

 warm eddy drifted westward, a cold intrusion pushed south to form a sec- 

 ondary front, and a subsurface cold ring drifted south of the stream. 

 Atmospheric effects were evident but were overshadowed by water mass 

 advection. The ability of an airborne radiation thermometer to show 

 changes in the Gulf Stream by means of a series of synoptic analyses has 

 been shown. Ship data, though not synoptic, can depict the three-dimen- 

 sional structure in the changing Gulf Stream region. 



