Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1038/NGEO2980 |
Formation of plateau landscapes on glaciated continental margins | |
Egholm, David L.1; Jansen, John D.1,2; Braedstrup, Christian F.1; Pedersen, Vivi K.3,4; Andersen, Jane L.1; Ugelvig, Sofie V.1; Larsen, Nicolaj K.1; Knudsen, Mads F.1 | |
2017-08-01 | |
发表期刊 | NATURE GEOSCIENCE |
ISSN | 1752-0894 |
EISSN | 1752-0908 |
出版年 | 2017 |
卷号 | 10期号:8 |
文章类型 | Article |
语种 | 英语 |
国家 | Denmark; Germany; Norway |
英文摘要 | Low-relief plateaus separated by deeply incised fjords are hallmarks of glaciated, passive continental margins. Spectacular examples fringe the once ice-covered North Atlantic coasts of Greenland, Norway and Canada, but low-relief plateau landscapes also underlie present-day ice sheets in Antarctica and Greenland. Dissected plateaus have long been viewed as the outcome of selective linear erosion by ice sheets that focus incision in glacial troughs, leaving the intervening landscapes essentially unaffected. According to this hypothesis, the plateaus are remnants of preglacial low-relief topography. However, here we use computational experiments to show that, like fjords, plateaus are emergent properties of long-term ice-sheet erosion. Ice sheets can either increase or decrease subglacial relief depending on the wavelength of the underlying topography, and plateau topography arises dynamically from evolving feedbacks between topography, ice dynamics and erosion over million-year timescales. This new mechanistic explanation for plateau formation opens the possibility of plateaus contributing significantly to accelerated sediment flux at the onset of the late Cenozoic glaciations, before becoming stable later in the Quaternary. |
领域 | 地球科学 ; 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000406641100015 |
WOS关键词 | ICE SHEETS ; EROSION RATES ; COSMOGENIC RADIONUCLIDES ; NORTHERN NORWAY ; EXPOSURE AGES ; EVOLUTION ; BE-10 ; QUATERNARY ; GLACIER ; HISTORY |
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/35181 |
专题 | 地球科学 气候变化 |
作者单位 | 1.Aarhus Univ, Dept Geosci, DK-8000 Aarhus, Denmark; 2.Univ Potsdam, Inst Earth & Environm Sci, D-14476 Potsdam, Germany; 3.Univ Bergen, Dept Earth Sci, N-5020 Bergen, Norway; 4.Bjerknes Ctr Climate Res, N-5020 Bergen, Norway |
推荐引用方式 GB/T 7714 | Egholm, David L.,Jansen, John D.,Braedstrup, Christian F.,et al. Formation of plateau landscapes on glaciated continental margins[J]. NATURE GEOSCIENCE,2017,10(8). |
APA | Egholm, David L..,Jansen, John D..,Braedstrup, Christian F..,Pedersen, Vivi K..,Andersen, Jane L..,...&Knudsen, Mads F..(2017).Formation of plateau landscapes on glaciated continental margins.NATURE GEOSCIENCE,10(8). |
MLA | Egholm, David L.,et al."Formation of plateau landscapes on glaciated continental margins".NATURE GEOSCIENCE 10.8(2017). |
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