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[chap. 4 



(a) 



(b) 



Fig. 49. Photograph of smoke laid parallel to the wind by an aircraft flying horizontally at 

 92 m elevation over the Caribbean, December 19, 1944. Wind speed at 10 m, 6.2 m/sec. 

 Sea minus air temperature, 0.2°C. Airspeed of plane, 120 knots. Elapsed time between 

 (a) and (b) is 88 seconds. (After Woodcock and Wywnan, 1947, Plate 5. By courtesy 

 of the N.Y. Academy of Sciences.) 



Fig. 50. Schematic representation of eddy motion at low levels over tropical oceans. 

 (After Riehl, 1954a, Fig. 1.) 



