Nonlinear Theories — Inertial 125 



In order to make a close comparison between the results of theory and 

 those of observation, Charney has chosen a parabohc form for the transport 

 function along the outer edge of the boundary layer, and has introduced 

 an arbitrary Florida Straits transport. The depth of the interface in the 

 two-layer model is identified with the depth of the 10° C. isothermal surface. 

 The results of Charney 's attempt to reproduce the flow pattern in the growth 

 region of the Gulf Stream, between the Florida Straits and Cape Hatteras, 

 are shown in fig. 69. Fig. 69, a, depicts the theoretically deduced contours of 

 the thickness of the upper layer, D*, in intervals of 100 m. (sohd lines) ; and 

 also contours of the transport function, ijr*, at intervals of 10 x 10®m.^/sec. 

 (broken fines). The a:-scale has been exaggerated by a factor of five. Fig. 69,6, 

 is a schematization of the depths of the 10° C. isotherm taken from fig. 66. 

 The agreement between the two charts is good, and, as Charney says, could 

 doubtless be made even more complete by a numerical treatment involving 

 actual coastal geometry, and real continuous density stratification along 

 the outer edges of the boundary layer. At present such refinements do not 

 seem worth while, however. One cannot help believing that a correct zero- 

 order approximation has now been achieved. 



