TABLE OF CONTENTS 



Vanf 



Foreword v 



The origin of currents 1 



Static consideration of a water mass 2 



Three general static conditions 3 



Dynamic consideration of a water mass 4 



Three variables in the sea 6 



Gravity 7 



Pressure 9 



Application of dynamic units 12 



Depth at which greatest obliquity of isobaric surfaces occur 13 



Specific volume 14 



Given temperature and salinity — a graphic method to find density 16 



Tables for converting densities into specific volumes in situ 18 



Distribution of mass 19 



Effect of earth rotation on ocean currents 20 



Resolution of forces in gradient currents 23 



The practical methods and form of computations generally followed in 



dynamic physical oceanography 24 



Determination of dynamic depth, stations 205 and 206 28 



Velocity of a current — how determined 31 



Direction of flow 35 



General suggestions for a program of hydrographical survey 36 



Description of a dynamic topographical chart (current map) 37 



Friction 41 



Effect of bottom configuration on currents 43 



Tides _ _ 44 



Variations in atmospheric pressure 45 



Winds _ 46 



(in) 



