RECOMMENDATIONS 



1. A study should be made of the variation of all parameters over one entire ice 

 season at one location. In conjunction with this survey, an attempt should be made 

 to relate the plate-wave velocity variation with the state of the sea ice and the state 

 of the sea ice with its breaking properties. 



2. Continuous measurements over a complete ice season should be made of: 

 (1) the temperature gradients through an ice sheet with a snow cover, (2) wind 

 gradients above the ice sheet, (3) wet and dry temperature gradients above the ice 

 sheet, and (4) the net radiation. This would give the heat transfer through an ice 

 sheet by three different methods. From these measurements the thermal conduc- 

 tivity of the sea-ice sheet, the surface albedo, and the exchange coefficients at the 

 air-snow or ice boundary can be determined. 



REFERENCES 



1. T. C. Poulter Geophysical Studies in the Antarctic Stanford Research Insti- 

 tute, [1950] p. 27. 



2. M. Ewing, et al. "Propagation of Elastic Waves in Ice. Part I" Journal of 

 Applied Physics vol. 5, no. 6, June 1934, pp. 165-168. 



3. N. E. Dorsey Properties of Ordinary Water-Substance in all its Phases: water- 

 vapor, water, and all the ices Reinhold, 1940, p. 461. 



4. J. Oliver, et al. "Elastic Waves in Arctic Pack Ice" American Geophysical 

 Union. Transactions vol. 35, no. 2, April 1954, pp. 282-292. 



5. J. B. Macelwane and F. W. Sohon Introduction to Theoretical Seismology 

 Wiley, 1936, pp. 89-105. 



6. Rayleigh, Lord The Theory of Sound 2d ed., Dover, 1945, vol. I, pp. 242-254. 



7. F. Press, et al. "Air-coupled Flexural Waves in Floating Ice" American Geo- 

 physical Union. Transactions vol. 32, no. 2, April 1951, pp. 166-172. 



8. L. R. IngersoU, et al. Heat Conduction; with engineering, geological, and 

 other applications McGraw-Hill, 1954, p. 3. 



9. M. B. Dobrin Introduction to Geophysical Prospecting McGraw-Hill, 1952, 

 pp. 292-297. 



10. H. U. Sverdrup, et al. The oceans, their physics, chemistry, and general bi- 

 ology Prentice-Hall, 1942, pp. 216-219. 



11. F. Malmgren On the Properties of Sea-Ice (Norwegian North Polar Expe- 

 dition with the Maud 1918-1925, Scientific Results vol. 1, no. 5) n. d. pp. 7-14. 



12. T. D. Northwood "Sonic Determination of the Elastic Properties of Ice" 

 Canadian Journal of Research sec A, vol. 25, no. 2, March 1947, pp. 88-95. 



13. F. Malmgren On the Properties of Sea-Ice (Norwegian North Polar Expedition 

 with the Maud 1918-1925, Scientific Results vol. 1, no. 5) n. d. pp. 15-18. 



14. F. Malmgren On the Properties of Sea-Ice (Norwegian North Polar Expedition 

 with the Maud 1918-1925, Scientific Results vol. 1, no. 5) n. d. pp. 64-65. 



15. N. E. Dorsey Properties of Ordinary Water-Substance in all its Phases: water- 

 vapor, water, and all the ices Reinhold, 1940, p. 483. 



16. W. J. DJchtel and G. A. Lundquist An Investigation into the Physical and 

 Electrical Characteristics of Sea Ice Naval Ordnance Laboratory [1950]. 



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