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	Frost sorting on slopes by needle ice: A laboratory simulation on the effect of slope gradient
	Li, Anyuan1,2,3; Matsuoka, Norikazu4; Niu, Fujun1
刊名	EARTH SURFACE PROCESSES AND LANDFORMS
	2018-03-15
卷号	43期号:3页码:685-694
关键词	sorted stripes freeze-thaw needle ice laboratory simulation frost creep patterned ground periglacial process
ISSN号	0197-9337
DOI	10.1002/esp.4276
通讯作者	Li, Anyuan(anyuanli1013@lzb.ac.cn)
英文摘要	Following a previous attempt to reproduce miniature sorted patterns on a level surface, we report the results of a full-scale laboratory simulation on frost sorting produced by needle ice activity on inclined surfaces. Four models, with different slope gradients (5 degrees, 7 degrees, 9 degrees, 11 degrees), were designed. Stones 6 mm in diameter placed in a grid covered 20% of the surface of frost-susceptible water-saturated soil. These models were subjected to 20-40 freeze-thaw cycles between 10 degrees C and -5 degrees C in 12 hours. The evolution of surface patterns was visually traced by photogrammetry. Needle ice growth and collapse induced downslope movement and concentrations of stones. A model produced incipient sorted circles on a 5 degrees slope, whereas it resulted in three distinct sorted stripes on a 7 degrees slope. The average diameter or spacing of these forms is 9.7-19.4 cm, comparable to those in the field dominated by diurnal freeze-thaw cycles. Surface parallel displacements of stone markers were traced with motion analysis software. The observed downslope stone displacements agree with those expected assuming that surface soil and stones move by repeated heaving perpendicular to the surface and vertical settlement due to gravity, although the growth of curved needle adds complexity to the overall displacements. Copyright (C) 2017 John Wiley & Sons, Ltd.
收录类别	SCI
WOS关键词	ALPINE ENVIRONMENT ; SORTED STRIPES ; SOLIFLUCTION ; RATES
WOS研究方向	Physical Geography ; Geology
WOS类目	Geography, Physical ; Geosciences, Multidisciplinary
语种	英语
出版者	WILEY
WOS记录号	WOS:000427007100009
内容类型	期刊论文
URI标识	http://www.corc.org.cn/handle/1471x/2557853
专题	寒区旱区环境与工程研究所
通讯作者	Li, Anyuan
作者单位	1.Chinese Acad Sci, Cold & Arid Reg Environm & Engn Res Inst, State Key Lab Frozen Soil Engn, Lanzhou 730000, Gansu, Peoples R China 2.Univ Chinese Acad Sci, Coll Resources & Environm, Beijing, Peoples R China 3.Univ Tsukuba, Grad Sch Life & Environm Sci, Tsukuba, Ibaraki, Japan 4.Univ Tsukuba, Fac Life & Environm Sci, Tsukuba, Ibaraki, Japan
推荐引用方式 GB/T 7714	Li, Anyuan,Matsuoka, Norikazu,Niu, Fujun. Frost sorting on slopes by needle ice: A laboratory simulation on the effect of slope gradient[J]. EARTH SURFACE PROCESSES AND LANDFORMS,2018,43(3):685-694.
APA	Li, Anyuan,Matsuoka, Norikazu,&Niu, Fujun.(2018).Frost sorting on slopes by needle ice: A laboratory simulation on the effect of slope gradient.EARTH SURFACE PROCESSES AND LANDFORMS,43(3),685-694.
MLA	Li, Anyuan,et al."Frost sorting on slopes by needle ice: A laboratory simulation on the effect of slope gradient".EARTH SURFACE PROCESSES AND LANDFORMS 43.3(2018):685-694.

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