Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1016/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
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ISSN | 0169-555X |
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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