气候变化领域集成服务门户(CCPortal): Near-surface snow particle dynamics from particle tracking velocimetry and turbulence measurements during alpine blowing snow storms

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DOI	10.5194/tc-10-3043-2016
	Near-surface snow particle dynamics from particle tracking velocimetry and turbulence measurements during alpine blowing snow storms
	Aksamit N.O.; Pomeroy J.W.
发表日期	2016
ISSN	19940416
卷号	10 期号:6
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.
学科领域	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
语种	英语
scopus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
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/119528
作者单位	Centre for Hydrology, University of Saskatchewan, Saskatoon, S7N 5C8, Canada
推荐引用方式 GB/T 7714	Aksamit N.O.,Pomeroy J.W.. Near-surface snow particle dynamics from particle tracking velocimetry and turbulence measurements during alpine blowing snow storms[J],2016,10(6).
APA	Aksamit N.O.,&Pomeroy J.W..(2016).Near-surface snow particle dynamics from particle tracking velocimetry and turbulence measurements during alpine blowing snow storms.Cryosphere,10(6).
MLA	Aksamit N.O.,et al."Near-surface snow particle dynamics from particle tracking velocimetry and turbulence measurements during alpine blowing snow storms".Cryosphere 10.6(2016).