contents 



l 



2 

 3 



4 



10 

 11 

 15 

 15 

 16 



PREFACE 



INTRODUCTION 



PREVIOUS INFORMATION 



OBSERVATIONS 



WATER MASS AND STRUCTURE 



CIRCULATION 



SOUND VELOCITY 



SUMMARY OF CONCLUSIONS 



RECOMMENDATIONS 



APPENDIX: DETAILED OCEANOGRAPHIC DATA 



illustrations 



4 

 4 



1 

 2o 



4 



2b 



5 



3a 



5 



3b 



6 



4a 



6 



4b 



6 



5a 



6 



5b 



7 



6a 



7 



6b 



10a 

 10b 



Vertical Distribution of Temperature, Salinity, and Dissolved Oxygen, Station 19 



Temperature Minimum, ° C 



Depth of Temperature Minimum, Meters 



Temperature-Salinity Relations at Selected Stations 



Locations of Sections Shown in Figures 4, 5, and 6 



Vertical Distributions of Temperature, Section I 



Vertical Distributions of Salinity, Section I 



Vertical Distributions of Temperature, Section II 



Vertical Distributions of Salinity, Section II 



Vertical Distributions of Temperature, Section III 



Vertical Distributions of Salinity, Section III 



Temperature Maximum, ° C 



Depth of Temperature Maximum, Meters 



Circulation of Surface Computed Relative to the 500-Meter Surface 



Circulation of 150-Meter Level Computed Relative to the 500-Meter Surface. 



Sound-Velocity Structure, Computed from Data Obtained by Bottle Cast, at Selected Stations 



(See Figure 3b for Locations) 



Sound Velocity at the Channel Axis, Feet per Second 



Depth of Sound-Channel Axis, Meters 



