globalchange  > 影响、适应和脆弱性
DOI: 10.5194/tc-10-3043-2016
Scopus记录号: 2-s2.0-85006705669
论文题名:
Near-surface snow particle dynamics from particle tracking velocimetry and turbulence measurements during alpine blowing snow storms
作者: Aksamit N; O; , Pomeroy J; W
刊名: Cryosphere
ISSN: 19940416
出版年: 2016
卷: 10, 期:6
起始页码: 3043
结束页码: 3062
语种: 英语
英文关键词: accuracy assessment ; alpine environment ; blowing snow ; measurement method ; numerical model ; particle motion ; snow cover ; storm ; subsurface flow ; three-dimensional flow ; turbulence ; two phase flow ; wind tunnel ; Peru tomato mosaic virus
英文摘要: Many blowing snow conceptual and predictive models have been based on simplified two-phase flow dynamics derived from time-averaged observations of bulk flow conditions in blowing snow storms. Measurements from the first outdoor application of particle tracking velocimetry (PTV) of near-surface blowing snow yield new information on mechanisms for blowing snow initiation, entrainment, and rebound, whilst also confirming some findings from wind tunnel observations. Blowing snow particle movement is influenced by complex surface flow dynamics, including saltation development from creep that has not previously been measured for snow. Comparisons with 3-D atmospheric turbulence measurements show that blowing snow particle motion immediately above the snow surface responds strongly to high-frequency turbulent motions. Momentum exchange from wind to the dense near-surface particle-laden flow appears significant and makes an important contribution to blowing snow mass flux and saltation initiation dynamics. The more complete and accurate description of near-surface snow particle motions observable using PTV may prove useful for improving blowing snow model realism and accuracy. � Author(s) 2016.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/75022
Appears in Collections:影响、适应和脆弱性
气候变化与战略

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作者单位: Centre for Hydrology, University of Saskatchewan, Saskatoon, Canada

Recommended Citation:
Aksamit N,O,, Pomeroy J,et al. Near-surface snow particle dynamics from particle tracking velocimetry and turbulence measurements during alpine blowing snow storms[J]. Cryosphere,2016-01-01,10(6)
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