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DOI	10.5194/tc-8-1825-2014
	Influence of stress, temperature and crystal morphology on isothermal densification and specific surface area decrease of new snow
	Schleef S.; Löwe H.; Schneebeli M.
发表日期	2014
ISSN	19940416
卷号	8 期号:5
英文摘要	Laboratory-based, experimental data for the microstructural evolution of new snow are scarce, though applications would benefit from a quantitative characterization of the main influences. To this end, we have analyzed the metamorphism and concurrent densification of new snow under isothermal conditions by means of X-ray microtomography and compiled a comprehensive data set of 45 time series. In contrast to previous measurements on isothermal metamorphism on time scales of weeks to months, we analyzed the initial 24-48 h of snow evolution at a high temporal resolution of 3 hours. The data set comprised natural and laboratory-grown snow, and experimental conditions included systematic variations of overburden stress, temperature and crystal habit to address the main influences on specific surface area (SSA) decrease rate and densification rate in a snowpack. For all conditions, we found a linear relation between density and SSA, indicating that metamorphism has an immediate influence for the densification of new snow. The slope of the linear relation, however, depends on the other parameters which were analyzed individually to derive a best-fit parameterization for the SSA decrease rate and densification rate. In the investigated parameter range, we found that the initial value of the SSA constituted the main morphological influence on the SSA decrease rate. In turn, the SSA decrease rate constituted the main influence on the densification rate. © 2014 Author(s).
学科领域	data set; environmental stress; isotherm; metamorphism; morphology; parameterization; quantitative analysis; resolution; surface area; temperature effect
语种	英语
scopus关键词	data set; environmental stress; isotherm; metamorphism; morphology; parameterization; quantitative analysis; resolution; surface area; temperature effect
来源期刊	Cryosphere
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/120047
作者单位	WSL Institute for Snow and Avalanche Research SLF, Davos, Switzerland
推荐引用方式 GB/T 7714	Schleef S.,Löwe H.,Schneebeli M.. Influence of stress, temperature and crystal morphology on isothermal densification and specific surface area decrease of new snow[J],2014,8(5).
APA	Schleef S.,Löwe H.,&Schneebeli M..(2014).Influence of stress, temperature and crystal morphology on isothermal densification and specific surface area decrease of new snow.Cryosphere,8(5).
MLA	Schleef S.,et al."Influence of stress, temperature and crystal morphology on isothermal densification and specific surface area decrease of new snow".Cryosphere 8.5(2014).