SECT. 2] 



LARGE-SC!ALE INTERACTIONS 



125 



their own energy input. Tlie apparent paradox raised concerning how equatorial 

 regions may still serve as the atmosphere's "firebox" will be resolved at the end 

 of this section and in Section 5 (page 164). The radiation balance of the sea 

 surface grows rapidly with decreasing latitude only in temperate zones, while 

 in tropical regions it is only slightly dependent on the latitude. 



O -I - 



Svefdrup 



Fig. 12. Net ocean-current heat transports in Northern Hemisphere obtained by in- 

 tegrating Qj^o of Sverdrup (1957) and Budyko (1956). (After Bryan and Webster, 1960, 

 unpubHshed.) Positive heat transport poleward. Abscissa in degrees North Latitvide; 

 ordinate heat transport in units 10^9 cal/day. 



