assumption, 



ot ~ ox vp~ ox/ + oy^p oy' Oz^p oz/ » 



where T is the temperature, and A„, A , A are exchange coefficients 



x y z 



for heat conduction. With an east-west symmetry, as in our model, 

 we need only to consider the resulting temperature distribution 

 in a meridional cross section. Stationary conditions are possible 



if 



Oy ^p oy' " " Oz vp oz' * 

 Due to the sun's radiation there is a heat gain at the equator 

 and a heat loss at the poles. Suppose that a meridional temperature 

 distribution is maintained at the sea surface, and let T(y) at the 

 sea surface be 



T(y) = T p + T cos fg y , (14) 



where T is the temperature of the sea surface at the pole, 

 (y = b), T + T the temperature at the equator (y = 0). 



If, for simplicity, we assume A and A to be constant in 



y z 



space, but A^>- A , a solution of the differential equation 



A v 4 + A 4 = (15) 



y dy 2 z dz 2 

 with the boundary condition (14) is 



T ^> - T p * T o COS co^ h ah Z) ""-ft'. Cl» 



where 



a ~ 2b / A • 



v z 



Assume that the ratio A /A ~ 10', and then, with b = 90° ~ 10,000 Km, 



a = 0,497 . 

 Further, let T Q = 25°C, T m = 3 C, and let h = 6000 m. 



18 



