Arid
DOI10.1016/j.geomorph.2009.02.028
Sand dune movement in the Victoria Valley, Antarctica
Bourke, Mary C.1,2; Ewing, Ryan C.3; Finnegan, David4; McGowan, Hamish A.5
通讯作者Bourke, Mary C.
来源期刊GEOMORPHOLOGY
ISSN0169-555X
出版年2009
卷号109期号:3-4页码:148-160
英文摘要

We use vertical aerial photographs and LiDAR topographic survey data to estimate dune migration rates in the Victoria Valley dunefield, Antarctica, between 1961 and 2001. Results confirm that the dunes migrated an average of 1.5 m/year. These values are consistent with other estimates of dune migration from cold climate deserts and are significantly lower than estimates from warm deserts. Dune migration rates are retarded by the presence of entrained ice, soil moisture and a reversing wind regime. Dune absorption, merging and limb extension are apparent from the time-series images and account for significant changes in dune form and the field-scale dune pattern. Dune-field pattern analysis shows an overall increase in dune-field organization with an increase in mean dune spacing and a reduction in total crest length and defect density. These data suggest that dunes in other cold desert environments on Earth, Mars or Titan, that may also have interbedded frozen laminae, still have the potential to migrate and organize, albeit at lower rates than dunes in warm deserts. (C) 2009 Elsevier B.V. All rights reserved.


英文关键词Antarctica Dune Niveo-aeolian Migration
类型Article
语种英语
国家USA ; England ; Australia
收录类别SCI-E
WOS记录号WOS:000267794800007
WOS关键词BARCHAN DUNES ; SOUTHERN PERU ; SPATIALLY DIVERSE ; EOLIAN SEDIMENT ; IMPERIAL VALLEY ; FIELD PATTERNS ; WIND ; CALIFORNIA ; TRANSPORT ; DEPOSITS
WOS类目Geography, Physical ; Geosciences, Multidisciplinary
WOS研究方向Physical Geography ; Geology
来源机构University of Oxford
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/160808
作者单位1.Planetary Sci Inst, Tucson, AZ USA;
2.Univ Oxford, Sch Geog, OUCE, Oxford OX1 3QY, England;
3.Univ Texas Austin, Jackson Sch Geosci, Dept Geol Sci, Austin, TX 78712 USA;
4.USA, Cold Reg Res & Engn Lab, Hanover, NH 03755 USA;
5.Univ Queensland, Sch Geog Planning & Architecture, St Lucia, Qld 4072, Australia
推荐引用方式
GB/T 7714
Bourke, Mary C.,Ewing, Ryan C.,Finnegan, David,et al. Sand dune movement in the Victoria Valley, Antarctica[J]. University of Oxford,2009,109(3-4):148-160.
APA Bourke, Mary C.,Ewing, Ryan C.,Finnegan, David,&McGowan, Hamish A..(2009).Sand dune movement in the Victoria Valley, Antarctica.GEOMORPHOLOGY,109(3-4),148-160.
MLA Bourke, Mary C.,et al."Sand dune movement in the Victoria Valley, Antarctica".GEOMORPHOLOGY 109.3-4(2009):148-160.
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