All-101 15 



more, the mass transport through the Gulf Stream responds to 

 the v/ind but lags behind it at all times except at the instants 

 of extreme wind variation v/hen the tv;o are in phase. 



(ii) The maximum lag appears when the wind is in its 

 mean position and an interval of about nine days elapses between 

 the time at v;hich the wind reaches its mean value and the time 

 at v/hich the transport reaches its mean value. The actual 

 length of the interval, i.e., nine days, is independent of the 

 frequency of the wind variation, 



(iii) The value of the maximum mass transport through the 

 Gulf Stream does not depend on the frequency but only on the 

 maximum strength of the wind. 



(iv) The Gulf Stream does not undergo any noticeable east- 

 west shift nor is its width altered because of the v/ind variation. 



For the steady tv/o-layer problem, the streamline pattern 

 coincides with that of the one-layer case. The computed steady 

 position of the thermocline can be made to agree qualitatively 

 with the position of the observed thermocline provided the tv/o 

 parameters (a) the thickness of the top layer and (b) the density 

 difference, are chosen appropriately. 



At the outset of our investigation we had hoped to solve 

 the lineari'3ed, non-steady, two-layer problem with no a priori 

 assumption concerning the vertical distribution of velocity. 

 However, we v/ere unsuccessful in doing so except for the case 

 of a v/ind with a period of oscillation of 100 years or more. 

 For such a low frequency, the retention of the time derivative 



