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ACKNOWLEDGMENTS Fukuzawa, T. and E. Akitaya. 1993. Depth- hoar crystal growth
The authors would like to express our thanks to Dr. K. in the surface layer under high temperature gradient. Annals of
Nishimura of Institute of Low Temperature Science, Glaciology , 18 , 39- 45.
Hokkaido University, for helpful suggestions. We are Lang, R. M., B. R. Leo, and R. L. Brown. 1984. Observations on
grateful to the staff of the Teshio Experimental Forests the growth process and strength characteristics of surface hoar.
of Hokkaido University for their logistic support. This Proceedings International Snow Science Workshop , Aspen,
research was supported by the fund for avalanche re- Colorado, 188- 195.
search of the Ministry of Education, Science, Culture Ozeki, T. and E. Akitaya. 1996. Field observations of sun crust
and Sports, Japan. formation in Hokkaido, Japan. Arctic and Alpine Research , 28
(2), 244- 248.

REFERENCES Perla, R. I. and M. Martinelli, Jr. 1976. Avalanche Handbook .
Hachikubo, A. and E. Akitaya. 1997. The effect of wind on sur- Agric. Handb. 489, USDA Forest Service, Fort Collins, Colo-
face hoar growth on snow. J. Geophys. Res. , submitted. rado, 254 pp.
Hachikubo, A., T. Fukuzawa and E. Akitaya. 1995. Formation Takeuchi, K., and J. Kondo. 1981. Atmosphere near the Ground
rate of surface hoar crystals under various wind velocities. Pro- Surface. Tokyo University Press, Tokyo, 226 pp. [In Japanese]
ceedings International Snow Science Workshop , Snowbird,
Utah, 132- 137.
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