- 4 - 



slope of the interface. We can show that this slope is a nattiral 

 result of the mixing process. 



For the mixing process assumed here p' changes such that 



Ap' = ^ (p_p.) . (8) 



n 



Equation (8) tells us that since space changes exist because of mixing 



<j X H ox. 

 This is essentially the same as equation (7). Thus the 



slope of the interface resulting from mixing balances the geostrophic 



current created by mixing. 



Some of the features of such a wind mixing current are 



shoiAm in Figure 2. The assumptions are made that a steady wind 



uniform over the region is blowing over the right-hand portion, while 



a calm exists over the left portion of the figure. These conditions 



hive prevailed for some time so that transient effects are no longer 



present. The density is constant in the vertical above and below 



the thermocline transition zone, although it varies in the x-direction. 



The induced current thus would produce the isobaric pattern shown. 



A geostrophic current would thus be directed into the figure, and 



would vary from zero at the top surface to a maximum at the deepest 



part of the transition zone. Figure 2 differs from Figure 1C6 in 



The O ceans (p. A4-6) in that Figure 2 shows a horizontal variation in 



density above the transition zone, while there is no such density 



transition in Figure 3 adapted from The Oceans . 



