气候变化领域集成服务门户(CCPortal): The evolution of snow bedforms in the Colorado Front Range and the processes that shape them

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DOI	10.5194/tc-13-1267-2019
	The evolution of snow bedforms in the Colorado Front Range and the processes that shape them
	Kochanski K.; Anderson R.S.; Tucker G.E.
发表日期	2019
ISSN	19940416
EISSN	13
起始页码	1267
结束页码	1281
卷号	13 期号:4
英文摘要	When wind blows over dry snow, the snow surface self-organizes into bedforms such as dunes, ripples, snow waves, and sastrugi. These bedforms govern the interaction between wind, heat, and the snowpack, but thus far they have attracted few scientific studies. We present the first time-lapse documentation of snow bedform movement and evolution, as part of a series of detailed observations of snow bedform movement in the Colorado Front Range. We show examples of the movement of snow ripples, snow waves, barchan dunes, snow steps, and sastrugi. We also introduce a previously undocumented bedform: the stealth dune. These observations show that (1) snow dunes accelerate minute-by-minute in response to gusts, (2) sastrugi and snow steps present steep edges to the wind and migrate downwind as those edges Erode, (3) snow waves and dunes deposit layers of cohesive snow in their wake, and (4) bedforms evolve along complex cyclic trajectories. These observations provide the basis for new conceptual models of bedform evolution, based on the relative fluxes of snowfall, aeolian transport, erosion, and snow sintering across and into the surface. We find that many snow bedforms are generated by complex interactions between these processes. The prototypical example is the snow wave, in which deposition, sintering, and erosion occur in transverse stripes across the snowscape. © Author(s) 2019. This work is distributed under the Creative Commons Attribution 4.0 License.
学科领域	barchan; bedform; movement; shape; snow cover; snowpack; wake; Colorado; Erode; Front Range; India; Rocky Mountains; Tamil Nadu
语种	英语
scopus关键词	barchan; bedform; movement; shape; snow cover; snowpack; wake; Colorado; Erode; Front Range; India; Rocky Mountains; Tamil Nadu
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/118892
作者单位	Department of Geological Sciences, University of Colorado Boulder, Boulder, CO 80309, United States; Institute of Arctic and Alpine Research, University of Colorado Boulder, Boulder, CO 80309, United States; Cooperative Institute for Research in Environmental Sciences, University of Colorado Boulder, Boulder, CO 80309, United States
推荐引用方式 GB/T 7714	Kochanski K.,Anderson R.S.,Tucker G.E.. The evolution of snow bedforms in the Colorado Front Range and the processes that shape them[J],2019,13(4).
APA	Kochanski K.,Anderson R.S.,&Tucker G.E..(2019).The evolution of snow bedforms in the Colorado Front Range and the processes that shape them.The Cryosphere,13(4).
MLA	Kochanski K.,et al."The evolution of snow bedforms in the Colorado Front Range and the processes that shape them".The Cryosphere 13.4(2019).