气候变化领域集成服务门户(CCPortal): Understanding snow bedform formation by adding sintering to a cellular automata model

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DOI	10.5194/tc-13-3239-2019
	Understanding snow bedform formation by adding sintering to a cellular automata model
	Sharma V.; Braud L.; Lehning M.
发表日期	2019
ISSN	19940416
EISSN	13
起始页码	3239
结束页码	3260
卷号	13 期号:12
英文摘要	Cellular-automata-based modelling for simulating snow bedforms and snow deposition is introduced in this study. The well-known ReSCAL model, previously used for sand bedforms, is adapted for this purpose by implementing a simple sintering mechanism. The effect of sintering is first explored for solitary barchan dunes of different sizes and flow conditions. Three types of behaviour are observed: small barchans continue their motion without any perceptible difference while large barchans sinter immediately. Barchans of intermediate size split, leaving behind a sintered core and a smaller barchan is formed. It is found that sintering introduces an upper limit to the size of bedforms that can remain mobile. The concept of "maximum streamwise length" (MSL) is introduced and MSL is identified for different wind speeds using the solitary dune scenario. Simulations of the full evolution from an initially flat snow layer to a complex dune field are performed next. It is found that the largest bedforms lie below the MSL threshold. Additionally, it is found that shallow snow layers are most susceptible to mechanical destabilization by the wind. © 2020 BMJ Publishing Group. All rights reserved.
学科领域	barchan; bedform; cellular automaton; dune field; model; simulation
语种	英语
scopus关键词	barchan; bedform; cellular automaton; dune field; model; simulation
来源期刊	The Cryosphere
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/118797
作者单位	School of Architecture, Civil and Environmental Engineering, Swiss Federal Institute of Technology, Lausanne, Switzerland; WSL Institute for Snow and Avalanche Research SLF, Davos, Switzerland
推荐引用方式 GB/T 7714	Sharma V.,Braud L.,Lehning M.. Understanding snow bedform formation by adding sintering to a cellular automata model[J],2019,13(12).
APA	Sharma V.,Braud L.,&Lehning M..(2019).Understanding snow bedform formation by adding sintering to a cellular automata model.The Cryosphere,13(12).
MLA	Sharma V.,et al."Understanding snow bedform formation by adding sintering to a cellular automata model".The Cryosphere 13.12(2019).