GSTDTAP  > 气候变化
DOI10.1029/2021GL093101
The impact of lithology on fjord morphology
M. Bernard; P. Steer; K. Gallagher; D. L. Egholm
2021-07-30
发表期刊Geophysical Research Letters
出版年2021
英文摘要

Assessing the impact of glaciations on topography and the co-evolution of ice-sheet dynamics requires a thorough understanding of the factors that control fjord morphology. We investigate the role of lithology on glacial valley form using topographic analyses and numerical landscape evolution models. We measure fjord depths and widths from East Central Greenland (68°-75°N), and find a control of lithology on fjord width, with wider fjords in softer rocks (i.e., sedimentary rocks). This dependency of fjord width to bedrock properties is predicted by a quarrying erosion law, but not by an abrasion one, when considering results from a simple 2D model and a more detailed 3D ice flow model (iSOSIA). Our analyses and numerical results reveal a potential control of lithology on the width of glacial valleys with glacial quarrying as a plausible responsible mechanism.

领域气候变化
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文献类型期刊论文
条目标识符http://119.78.100.173/C666/handle/2XK7JSWQ/335361
专题气候变化
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GB/T 7714
M. Bernard,P. Steer,K. Gallagher,et al. The impact of lithology on fjord morphology[J]. Geophysical Research Letters,2021.
APA M. Bernard,P. Steer,K. Gallagher,&D. L. Egholm.(2021).The impact of lithology on fjord morphology.Geophysical Research Letters.
MLA M. Bernard,et al."The impact of lithology on fjord morphology".Geophysical Research Letters (2021).
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