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ACKNOWLEDGMENTSFukuzawa, T. and E. Akitaya. 1993. Depth- hoar crystal growth
The authorswouldlike toexpress ourthankstoDr.K.in the surface layer under high temperature gradient.Annals of
NishimuraofInstituteofLowTemperatureScience,Glaciology ,18 , 39- 45.
HokkaidoUniversity,forhelpfulsuggestions.We areLang, R. M., B. R. Leo, and R. L. Brown. 1984. Observations on
gratefultothe staff of the TeshioExperimentalForeststhe growth process and strength characteristics of surface hoar.
of Hokkaido University fortheirlogistic support.ThisProceedingsInternationalSnowScienceWorkshop ,Aspen,
researchwassupportedbythefundforavalanchere-Colorado, 188- 195.
searchoftheMinistryofEducation,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.

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Hachikubo, A., T.Fukuzawa and E.Akitaya. 1995. FormationTakeuchi, 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]
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