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	Pecularities of water vapor migration at snow cover-atmosphere and snow cover-ground boundaries
	Golubev V.N.; Frolov D.M.
发表日期	2015
ISSN	15607496
卷号	19 期号:1
英文摘要	Concentration gradient of water vapor in snow cover is determined by the presence of temperature gradient. The formation of water vapor concentration gradient on the boundaries of contacting media (snow cover-atmosphere and snow cover-underlying ground) is conditioned by the difference between water vapor content in pore spaces of snow and in boundary layers of atmosphere and ground. The result is the sublimation of ice grains and the migration of forming vapor. It has been demonstrated that the snow sublimation intensity under isothermal conditions depends on microstructure and varies from 42·10-8 kg/(m2·s) at -8 °C for ice and 40·10-8 kg/(m2·s) for snow with density 500 kg/m3 to 32·10-8 kg/(m2·s) for snow with density 160 kg/m3. Water vapor content in pore space of snow amounts to 1.08 at -22 °C and 1.045 at -5 °C in regard to its concentration defined by Clapeyron-Clausius equation. Consideration of water vapor transfer on the snow-ground boundary for isothermal conditions and at the presence of temperature gradient for sand and clay models has demonstrated that flux values range (8.0-39.3)·10-8 kg/(m2·s) (from ground to snow) and (1.0-2.5)× ×10-8 kg/(m2·s) (from snow to ground).
英文关键词	Mass transfer; Snow; Sublimation; Water vapour
学科领域	concentration (composition); mass transfer; pore space; snow cover; sublimation; water content; water vapor
语种	英语
scopus关键词	concentration (composition); mass transfer; pore space; snow cover; sublimation; water content; water vapor
来源期刊	Earth's Cryosphere
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/119989
作者单位	Lomonosov Moscow State University, Laboratory of Snow Avalanches and Mudflows, Department of Geography, Leninskie Gory, 1, Moscow, 119991, Russian Federation
推荐引用方式 GB/T 7714	Golubev V.N.,Frolov D.M.. Pecularities of water vapor migration at snow cover-atmosphere and snow cover-ground boundaries[J],2015,19(1).
APA	Golubev V.N.,&Frolov D.M..(2015).Pecularities of water vapor migration at snow cover-atmosphere and snow cover-ground boundaries.Earth's Cryosphere,19(1).
MLA	Golubev V.N.,et al."Pecularities of water vapor migration at snow cover-atmosphere and snow cover-ground boundaries".Earth's Cryosphere 19.1(2015).