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The extreme yet tra...
The extreme yet transient nature of glacial erosion
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Patton, H. (author)
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Hubbard, A. (author)
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- Heyman, Jakob (author)
- Gothenburg University,Göteborgs universitet,Institutionen för geovetenskaper,Department of Earth Sciences
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Alexandropoulou, N. (author)
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Lasabuda, A. P. E. (author)
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Stroeven, A. P. (author)
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Hall, A. M. (author)
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Winsborrow, M. (author)
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Sugden, D. E. (author)
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Kleman, J. (author)
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Andreassen, K. (author)
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(creator_code:org_t)
- 2022-11-30
- 2022
- English.
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In: Nature Communications. - : Springer Science and Business Media LLC. - 2041-1723. ; 13:1
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Abstract
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- Ice can sculpt extraordinary landscapes, yet the efficacy of, and controls governing, glacial erosion on geological timescales remain poorly understood and contended, particularly across Polar continental shields. Here, we assimilate geophysical data with modelling of the Eurasian Ice Sheet—the third largest Quaternary ice mass that spanned 49°Nto82°N—to decipher its erosional footprint during the entire last ~100 ka glacial cycle. Our results demonstrate extreme spatialandtemporal heterogeneity in subglacial erosion, with rates ranging from 0 to 5 mm a−1 and anetvolume equating to ~130,000 km3 of bedrock excavated to depths of ~190 m. A hierarchy of environmental controls ostensibly underpins this complex signature: lithology, topography and climate, though it is basal thermodynamics that ultimately regulates erosion, which can be variously protective, pervasive, or, highly selective. Our analysis highlights the remarkable yet fickle nature of glacial erosion—critically modulated by transient ice-sheet dynamics—with its capacity to impart a profound but piecemeal geological legacy across mid- and highlatitudes.
Subject headings
- NATURVETENSKAP -- Geovetenskap och miljövetenskap (hsv//swe)
- NATURAL SCIENCES -- Earth and Related Environmental Sciences (hsv//eng)
Publication and Content Type
- ref (subject category)
- art (subject category)
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- By the author/editor
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Patton, H.
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Hubbard, A.
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Heyman, Jakob
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Alexandropoulou, ...
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Lasabuda, A. P. ...
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Stroeven, A. P.
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show more...
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Hall, A. M.
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Winsborrow, M.
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Sugden, D. E.
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Kleman, J.
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Andreassen, K.
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show less...
- About the subject
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Earth and Relate ...
- Articles in the publication
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Nature Communica ...
- By the university
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University of Gothenburg