LIST OF ILLUSTRATIONS 



Page 



Fig. 1. Annual averages of surface temperatures according to two-degree zones for the Atlantic Ocean and according to five- 

 degree zones for tlie combined oceans 2 



2. Two-degree zonal averages of surface temperatures of the Atlantic Ocean for the months of February, May, August, 



and November 3 



3. Temperature gradients in degrees C. between the annual zonal averages of 2° lat. between 70° N. and 70° S 4 



4. Average position of the fronts and boundaries in the South Atlantic Ocean 7 



5. Vertical section of tlie temperatures through the Drake Passage (profile Va) 8 



6. Surface temperatures of profile Va according to the hourly values taken from the recording 8 



7. Surface temperatures of profile Vd (south of Africa) according to tlie hourly values taken from the recording 9 



8. Vertical section of the temperatures south of Cape Town (profile Vd) 10 



9. Surface currents south of Africa in January, drawn on tlie basis of the Dutch current displacements by A. Merz.. 10 



10. Surface currents south of Africa in May, drawn on the basis of the Dutch current displacements by A. Merz 11 



11. Surface currents south of Africa in October, drawn on the basis of the Dutch current displacements by A. Merz._ 11 



12. Diagram of a convergence-divergence line according to Bjerknes 12 



13. Surface currents in the middle South Atlantic Ocean in February 12 



14. Surface currents and temperature distribution in the area of the Falkland and Brazil currents in December 13 



15. Surface currents and temperature distribution in the area of the Falkland and Brazil currents in February 14 



16. Average position of the fronts and boundaries in the North Atlantic Ocean 15 



17. Diagram of the average water movement in the Irminger Sea and Denmark Straits in August, based on distribution 



of temperature, saline content, and density, according to the data obtained on the Meteor fisher}' patrols 16 



18. Position of the thermal equator at the surface of the hydrosphere 17 



19. Thermoisopleths on the surface for the one-degree field bands 30° W. to 31° W. between 15° N. and 13° S., with 



the position of the thermal equator 18 



20. Thermoisopleths at the surface for the one-degree field bands 20° W. to 21° W. between 20° N. and 10° S., with 



the position of the thermal equator 19 



21. Water movement at the surface in the equatorial area in April between 16° W. and 37° W., and between 2° N. and 



/■ 12° S., according to tlie Dutch current displacements for two-degree fields 19 



LIST OF TABLES 



Table 1. Annual average of the surface temperatures for every fifth degree of latitude of the Atlantic Ocean (tA) and of the 



combined oceans (tw) 3 



2. Temperature gradients for latitude differences of 1° at 65° W. long. (Drake Passage) 5 



3. Average position of the southern polar front and monthly averages of the water temperature at the front 6 



4. Average position of the subtropical boundary and its average monthly temperatures 6 



5. Position of the southern subtropical convergence according to current displacements in degrees of latitude 12 



6. Average position of the fronts and boundaries and average temperatures in the North Atlantic Ocean at 30° W. long. _ 14 



7. Most northerly, average, and most southerly positions of the tliermal equator 19 



Appendix I. Standard values of the surface temperature of the Atlantic Ocean for two-degree fields 21 



II. Two-degree zonal averages of surface temperature for the months and the year 50 



•These charts are not referred to in the text, but are included because of the valuable data shown thereon. 

 IV 



