Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2019GL084012 |
Radar-Detected Englacial Debris in the West Antarctic Ice Sheet | |
Winter, Kate1; Woodward, John1; Ross, Neil2; Dunning, Stuart A.2; Hein, Andrew S.3; Westoby, Matthew J.1; Culberg, Riley4; Marrero, Shasta M.3; Schroeder, Dustin M.4,5; Sugden, David E.3; Siegert, Martin J.6,7 | |
2019-09-10 | |
发表期刊 | GEOPHYSICAL RESEARCH LETTERS |
ISSN | 0094-8276 |
EISSN | 1944-8007 |
出版年 | 2019 |
文章类型 | Article;Early Access |
语种 | 英语 |
国家 | England; Scotland; USA |
英文摘要 | Structural glaci-geological processes can entrain basal sediment into ice, leading to its transportation and deposition downstream. Sediments potentially rich in essential nutrients, like silica and iron, can thus be transferred from continental sources to the ocean, where deposition could enhance marine primary productivity. However, a lack of data has limited our knowledge of sediment entrainment, transfer, and distribution in Antarctica, until now. We use ice-penetrating radar to examine englacial sediments in the Weddell Sea sector of the West Antarctic Ice Sheet. Radargrams reveal englacial reflectors on the leeside of nunataks and subglacial highlands, where Mie scattering analysis of the reflectors suggests particle sizes consistent with surface moraine sediments. We hypothesize that these sediments are entrained at the thermal boundary between cold and warm-based ice. Conservative estimates of >130 x 10(9) kg of englacial sediment in Horseshoe Valley alone suggest that the ice sheet has significant entrainment potential unappreciated previously. |
英文关键词 | radio echo sounding ground-penetrating radar West Antarctic Ice Sheet sediment transfer debris entrainment blue ice areas |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000485396900001 |
WOS关键词 | ELLSWORTH MOUNTAINS ; LATE PLEISTOCENE ; CLIMATE RECORD ; PATRIOT HILLS ; WEDDELL SEA ; STREAM ; EVOLUTION ; MORAINES ; BED |
WOS类目 | Geosciences, Multidisciplinary |
WOS研究方向 | Geology |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/186979 |
专题 | 气候变化 |
作者单位 | 1.Northumbria Univ, Fac Engn & Environm, Dept Geog & Environm Sci, Newcastle Upon Tyne, Tyne & Wear, England; 2.Newcastle Univ, Sch Geog Polit & Sociol, Newcastle Upon Tyne, Tyne & Wear, England; 3.Univ Edinburgh, Sch Geosci, Edinburgh, Midlothian, Scotland; 4.Stanford Univ, Dept Elect Engn, Stanford, CA 94305 USA; 5.Stanford Univ, Dept Geophys, Stanford, CA 94305 USA; 6.Imperial Coll London, Grantham Inst, London, England; 7.Imperial Coll London, Dept Earth Sci & Engn, London, England |
推荐引用方式 GB/T 7714 | Winter, Kate,Woodward, John,Ross, Neil,et al. Radar-Detected Englacial Debris in the West Antarctic Ice Sheet[J]. GEOPHYSICAL RESEARCH LETTERS,2019. |
APA | Winter, Kate.,Woodward, John.,Ross, Neil.,Dunning, Stuart A..,Hein, Andrew S..,...&Siegert, Martin J..(2019).Radar-Detected Englacial Debris in the West Antarctic Ice Sheet.GEOPHYSICAL RESEARCH LETTERS. |
MLA | Winter, Kate,et al."Radar-Detected Englacial Debris in the West Antarctic Ice Sheet".GEOPHYSICAL RESEARCH LETTERS (2019). |
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