Výsledky vyhledávání - "Emma L. M. Lewington"

A new, multi-scale mapping approach for reconstructing the flow evolution of the Fennoscandian Ice Sheet using high-resolution digital elevation models

Autor: Frances E. G. Butcher, Anna L. C. Hughes, Jeremy C. Ely, Christopher D. Clark, Emma L. M. Lewington, Benjamin M. Boyes, Alex C. Scoffield, Stephen Howcutt, Thomas P. F. Dowling

Data-driven reconstructions of palaeo-ice sheets based on their landform records are required for validation and improvement of numerical ice sheet models. In turn, such models can be used to better predict the future responses of the Antarctic and G

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::350d91542c40a65cc151969ddf6d23b0
https://doi.org/10.5194/egusphere-egu22-4765

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Ice sheet scale subglacial meltwater conduit dimensions and processes: insights from 3D morphometry of a large sample of eskers

Autor: Stephen J. Livingstone, Emma L. M. Lewington, Robert D. Storrar, Frances E. G. Butcher, Andrew Jones, Chris R. Stokes, Chris D. Clark, Cathy Delaney, David M. Evans, Nico Dewald

Meltwater exerts an important influence on ice sheet dynamics and has attracted an increasing amount of attention over the last 20 years. However, the active subglacial environment remains difficult to study mainly due to its inaccessibility. Underst

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::34b73994ec7c893fdc9b80197ff10816
https://doi.org/10.5194/egusphere-egu21-11371

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MELTWATER LANDFORM PERSPECTIVES ON SUBGLACIAL HYDROLOGICAL PROCESSES: INSIGHTS FROM HIGH-RESOLUTION MAPPING IN NORTHERN CANADA

Autor: Felix Ng, Stephen J. Livingstone, Jean Vérité, Christopher Clark, Isabelle McMartin, Robert D. Storrar, Emma L. M. Lewington, Nico Dewald, Andrew Sole, Edouard Ravier

Publikováno v: Geological Society of America Abstracts with Programs.

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::e1840078d5f0b729cd3f5477ec941c7e
https://doi.org/10.1130/abs/2021am-364855

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A model for interaction between conduits and surrounding hydraulically connected distributed drainage based on geomorphological evidence from Keewatin, Canada

Autor: Emma L. M. Lewington, Andrew Sole, Stephen J. Livingstone, Chris D. Clark, Robert D. Storrar

Publikováno v: The Cryosphere, Vol 14, Pp 2949-2976 (2020)
The Cryosphere

We identify and map visible traces of subglacial meltwater drainage around the former Keewatin Ice Divide, Canada, from high-resolution Arctic Digital Elevation Model (ArcticDEM) data. We find similarities in the characteristics and spatial locations

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f33324774ae3e587265b1296598ba7ce
https://tc.copernicus.org/articles/14/2949/2020/

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A quasi-annual record of time-transgressive esker formation: implications\ud for ice sheet reconstruction and subglacial hydrology

Autor: Emma L. M. Lewington, Isabelle McMartin, Felix Ng, Andrew Sole, Chris D. Clark, Stephen J. Livingstone, Robert D. Storrar, Nico Dewald

Publikováno v: The Cryosphere, Vol 14, Pp 1989-2004 (2020)
The Cryosphere

We identify and map chains of esker beads (series of aligned mounds) up to 15 m high and on average ∼ 65 m wide in central Nunavut, Canada, from the high-resolution (2 m) ArcticDEM. Based on the close 1 : 1 association with regularly sp

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e0b7e6a71920044d0e70700fff2cd217

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Large-scale integrated subglacial drainage around the former Keewatin Ice Divide, Canada reveals interaction between distributed and channelised systems

Autor: Andrew Sole, Robert D. Storrar, Emma L. M. Lewington, Chris D. Clark, Stephen J. Livingstone

Despite being widely studied, subglacial meltwater landforms are typically mapped and investigated individually, thus the drainage system as a whole remains poorly understood. Here, we identify and map all visible traces of subglacial meltwater flow

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8d2810934ea6c3e1ece44832485021be
https://doi.org/10.5194/tc-2020-10

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Distribution, characteristics and formation of esker enlargements

Autor: Robert D. Storrar, Chris D. Clark, Emma L. M. Lewington, Stephen J. Livingstone, Nico Dewald

Publikováno v: Geomorphology. 392:107919

Eskers are primarily ridges of glaciofluvial sediment deposited in subglacial, englacial and supraglacial conduits. They are typically straight to sinuous features, however, their planform morphology can be highly diverse. Esker enlargements are spat

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7ed062dcb866824664c6e0bec764cc50
https://doi.org/10.1016/j.geomorph.2021.107919

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An automated method for mapping geomorphological expressions of former subglacial meltwater pathways (hummock corridors) from high resolution digital elevation data

Autor: Felix Ng, Emma L. M. Lewington, Stephen J. Livingstone, Andrew Sole, Chris D. Clark

Publikováno v: Geomorphology

Elongated tracts of hummocks or ‘hummock corridors’, exposed on palaeo-ice sheet beds, are believed to represent former subglacial meltwater pathways. Here, we present a method, coded in MATLAB, for automatically detecting and mapping hummock cor

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b70d884b52566c156144749fdd5987f6

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