Figure 7: (a) The difference between land and ocean temperature gradients, for T = 25° 0,
as a function of ocean area ratio c and the logarithm of the ratio between the zonal and
meridional heat transport efficiencies, IOg10 (JlJ X) . (b) Zonal mean temperature gradient,
for T = 25°0, against c and IOg10(/k/X). (c) Effective ocean area ratio CL against c and
10glO(/k/X) .