IMHE OpenIR  > Journal of Mountain Science  > Journal of Mountain Science-2014  > Vol11 No.2
Metamorphism and Microstructure of Seasonal Snow: Single Layer Tracking in Western Tianshan, China
HONG Wen; WEI Wen-shou; LIU Ming-zhe; LU Heng; HAN Xi; ZHANG Yan-wei
Corresponding AuthorWEI Wen-shou
2014-03
Source PublicationJournal of Mountain Science
Volume11Issue:2Pages:496-506
AbstractSnowpack is a combination of several snow layers. Accordingly, snowpack natural metamorphism is composed of several stages. The aim of this study is to investigate the natural snow metamorphism at the snow layer unit. The field investigation was conducted at the Tianshan Station for Snow Cover and Avalanche Research, Chinese Academy of Sciences (43°16' N, 84°24' E, and 1,776 m a.s.l.), during the winter of 2010-2011. A complete metamorphic procedure and the corresponding microstructure of a target snow layer were tracked. The results indicate that: the ideal and complete metamorphic process and the corresponding predominant snow grain shape have 5 stages: 1) unstable kinetic metamorphism near the surface; 2) unstable kinetic metamorphism under pressure; 3) stable kinetic metamorphism; 4) equilibrium metamorphism; 5) wet snow metamorphism. Snow grain size sharply decreased in the surface stage, and then changed to continuously increase. Rapid increase of grain size occurred in the stable kinetic metamorphism and wet snow metamorphism stage. The characteristic length was introduced to represent the real sizes of depth hoar crystals. The snow grain circularity ratio had a variation of “rapid increase – slow decrease – slow increase”, and the snow aggregations continuously increased with time. Snow density grew stepwise and remained steady from the stable kinetic to the equilibrium metamorphism stage. The differences in metamorphism extent and stages among snow layers, led to the characteristic layered structure of snowpack.
KeywordSnow Metamorphism Snow Microstructure Tracking Seasonal Snow Tianshan
Indexed BySCI
Language英语
Document Type期刊论文
Identifierhttp://ir.imde.ac.cn/handle/131551/6861
CollectionJournal of Mountain Science_Journal of Mountain Science-2014_Vol11 No.2
Corresponding AuthorWEI Wen-shou
Recommended Citation
GB/T 7714
HONG Wen,WEI Wen-shou,LIU Ming-zhe,et al. Metamorphism and Microstructure of Seasonal Snow: Single Layer Tracking in Western Tianshan, China[J]. Journal of Mountain Science,2014,11(2):496-506.
APA HONG Wen,WEI Wen-shou,LIU Ming-zhe,LU Heng,HAN Xi,&ZHANG Yan-wei.(2014).Metamorphism and Microstructure of Seasonal Snow: Single Layer Tracking in Western Tianshan, China.Journal of Mountain Science,11(2),496-506.
MLA HONG Wen,et al."Metamorphism and Microstructure of Seasonal Snow: Single Layer Tracking in Western Tianshan, China".Journal of Mountain Science 11.2(2014):496-506.
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