globalchange  > 影响、适应和脆弱性
DOI: 10.1002/2017MS000982
Scopus记录号: 2-s2.0-85039067959
论文题名:
A New Formula for Estimating the Threshold Wind Speed for Snow Movement
作者: He S; , Ohara N
刊名: Journal of Advances in Modeling Earth Systems
ISSN: 19422466
出版年: 2017
卷: 9, 期:7
起始页码: 2514
结束页码: 2525
语种: 英语
英文关键词: Atmospheric movements ; Deposition ; Hydrology ; Meteorology ; Models ; Particle size ; Process engineering ; Sintering ; Snow ; Speed ; Constant threshold ; Empirical parameters ; Incipient motion ; Meteorological data ; Natural environments ; Sintering process ; Snow movement ; Threshold wind speed ; Wind ; calibration ; data assimilation ; hydrological modeling ; hypothesis testing ; model validation ; numerical model ; particle size ; sinter ; snow cover ; temperature effect ; threshold ; wind velocity ; Alps
英文摘要: Threshold wind speed for snow movement is one of the most important parameters describing the wind-transport snow process. A majority of previous studies used empirical and constant threshold wind speeds while the variations of atmosphere condition and snow age seem to greatly affect the snow settlement process. This study tested the hypothesis that the threshold wind speed for snow transport increases as deposition time passed since last snowfall by introducing a new formula of the threshold wind speed for snow movement. It was theoretically derived based on the sintering process modeling and the moment balance of a snow particle. Through this formula, the influences of snow particle size, temperature, and deposition time on the threshold wind speed were explicitly taken into consideration. However, two empirical parameters in the sintering process modeling remained in the new formula, and they were determined by a calibration-validation procedure using the field observed snow flux data. The snow flux and meteorological data collected at the ISAW stations (http://www.iav.ch) including large number of snow transport events during five winter seasons were used to test this formula. It was shown that the new formula qualitatively described the threshold wind speed required for the incipient motion of snow under various conditions in the natural environment of the Alps. © 2017. The Authors.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/75701
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: Department of Civil and Architectural Engineering, University of Wyoming, Laramie, WY, United States

Recommended Citation:
He S,, Ohara N. A New Formula for Estimating the Threshold Wind Speed for Snow Movement[J]. Journal of Advances in Modeling Earth Systems,2017-01-01,9(7)
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