Landscape evolution and sediment delivery in a High Arctic proglacial lake, Ellesmere Island, Canadian Arctic Archipelago
Abstract Geophysical and morphosedimentary investigations were conducted at Strathcona Lake, a High Arctic proglacial lake and its catchment connected to the Taggart Lake Glacier, northwest corner of the Prince of Wales Icefield in Ellesmere Island (eastern Canadian Arctic Archipelago). The mapping...
Published in: | Earth Surface Processes and Landforms |
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Online Access: | http://dx.doi.org/10.1002/esp.5811 https://onlinelibrary.wiley.com/doi/pdf/10.1002/esp.5811 |
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crwiley:10.1002/esp.5811 2024-06-02T07:59:56+00:00 Landscape evolution and sediment delivery in a High Arctic proglacial lake, Ellesmere Island, Canadian Arctic Archipelago Chassiot, Léo Lajeunesse, Patrick Francus, Pierre Normandeau, Alexandre Lapointe, François Massa, Charly De Coninck, Arnaud Natural Sciences and Engineering Research Council of Canada 2024 http://dx.doi.org/10.1002/esp.5811 https://onlinelibrary.wiley.com/doi/pdf/10.1002/esp.5811 en eng Wiley http://creativecommons.org/licenses/by-nc-nd/4.0/ Earth Surface Processes and Landforms ISSN 0197-9337 1096-9837 journal-article 2024 crwiley https://doi.org/10.1002/esp.5811 2024-05-03T10:39:38Z Abstract Geophysical and morphosedimentary investigations were conducted at Strathcona Lake, a High Arctic proglacial lake and its catchment connected to the Taggart Lake Glacier, northwest corner of the Prince of Wales Icefield in Ellesmere Island (eastern Canadian Arctic Archipelago). The mapping of glaciomarine landforms and units provides, together with updated radiocarbon information, a framework for catchment evolution and sediment delivery to the lake during deglaciation and glacio‐isostatically induced relative sea level fall. A staircase of deltas with descending altitudes provide evidence for a spatially diachronous timing of ice retreat from the catchments around Strathcona Lake. Swath bathymetric mapping coupled with acoustic sediment stratigraphy show draped infills with a transition from marine to rhythmically bedded lacustrine sediments produced by hyperpycnal flows. Multiproxy investigations on a set of sediment cores highlight proglacial varves interrupted by rhythmites resulting from the erosion of fluvially incised glaciomarine sediments stored in the catchment. Pluricentimetric proglacial varves formed during the last century in response to periods of intense glacial melt, notably since the 21st century. The sedimentary record suggests the varved sediments from Strathcona Lake can be used to reconstruct the melting history of the Prince of Wales Icefield. This work provides a geomorphological, sedimentological, and geochemical framework that should guide future varve‐based reconstructions of glacial and climatic variability in Ellesmere Island. Article in Journal/Newspaper Arctic Archipelago Arctic Canadian Arctic Archipelago Ellesmere Island Wiley Online Library Arctic Canadian Arctic Archipelago Ellesmere Island Prince of Wales Icefield ENVELOPE(-78.998,-78.998,78.252,78.252) Strathcona ENVELOPE(99.200,99.200,-67.417,-67.417) Earth Surface Processes and Landforms |
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Open Polar |
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Wiley Online Library |
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crwiley |
language |
English |
description |
Abstract Geophysical and morphosedimentary investigations were conducted at Strathcona Lake, a High Arctic proglacial lake and its catchment connected to the Taggart Lake Glacier, northwest corner of the Prince of Wales Icefield in Ellesmere Island (eastern Canadian Arctic Archipelago). The mapping of glaciomarine landforms and units provides, together with updated radiocarbon information, a framework for catchment evolution and sediment delivery to the lake during deglaciation and glacio‐isostatically induced relative sea level fall. A staircase of deltas with descending altitudes provide evidence for a spatially diachronous timing of ice retreat from the catchments around Strathcona Lake. Swath bathymetric mapping coupled with acoustic sediment stratigraphy show draped infills with a transition from marine to rhythmically bedded lacustrine sediments produced by hyperpycnal flows. Multiproxy investigations on a set of sediment cores highlight proglacial varves interrupted by rhythmites resulting from the erosion of fluvially incised glaciomarine sediments stored in the catchment. Pluricentimetric proglacial varves formed during the last century in response to periods of intense glacial melt, notably since the 21st century. The sedimentary record suggests the varved sediments from Strathcona Lake can be used to reconstruct the melting history of the Prince of Wales Icefield. This work provides a geomorphological, sedimentological, and geochemical framework that should guide future varve‐based reconstructions of glacial and climatic variability in Ellesmere Island. |
author2 |
Natural Sciences and Engineering Research Council of Canada |
format |
Article in Journal/Newspaper |
author |
Chassiot, Léo Lajeunesse, Patrick Francus, Pierre Normandeau, Alexandre Lapointe, François Massa, Charly De Coninck, Arnaud |
spellingShingle |
Chassiot, Léo Lajeunesse, Patrick Francus, Pierre Normandeau, Alexandre Lapointe, François Massa, Charly De Coninck, Arnaud Landscape evolution and sediment delivery in a High Arctic proglacial lake, Ellesmere Island, Canadian Arctic Archipelago |
author_facet |
Chassiot, Léo Lajeunesse, Patrick Francus, Pierre Normandeau, Alexandre Lapointe, François Massa, Charly De Coninck, Arnaud |
author_sort |
Chassiot, Léo |
title |
Landscape evolution and sediment delivery in a High Arctic proglacial lake, Ellesmere Island, Canadian Arctic Archipelago |
title_short |
Landscape evolution and sediment delivery in a High Arctic proglacial lake, Ellesmere Island, Canadian Arctic Archipelago |
title_full |
Landscape evolution and sediment delivery in a High Arctic proglacial lake, Ellesmere Island, Canadian Arctic Archipelago |
title_fullStr |
Landscape evolution and sediment delivery in a High Arctic proglacial lake, Ellesmere Island, Canadian Arctic Archipelago |
title_full_unstemmed |
Landscape evolution and sediment delivery in a High Arctic proglacial lake, Ellesmere Island, Canadian Arctic Archipelago |
title_sort |
landscape evolution and sediment delivery in a high arctic proglacial lake, ellesmere island, canadian arctic archipelago |
publisher |
Wiley |
publishDate |
2024 |
url |
http://dx.doi.org/10.1002/esp.5811 https://onlinelibrary.wiley.com/doi/pdf/10.1002/esp.5811 |
long_lat |
ENVELOPE(-78.998,-78.998,78.252,78.252) ENVELOPE(99.200,99.200,-67.417,-67.417) |
geographic |
Arctic Canadian Arctic Archipelago Ellesmere Island Prince of Wales Icefield Strathcona |
geographic_facet |
Arctic Canadian Arctic Archipelago Ellesmere Island Prince of Wales Icefield Strathcona |
genre |
Arctic Archipelago Arctic Canadian Arctic Archipelago Ellesmere Island |
genre_facet |
Arctic Archipelago Arctic Canadian Arctic Archipelago Ellesmere Island |
op_source |
Earth Surface Processes and Landforms ISSN 0197-9337 1096-9837 |
op_rights |
http://creativecommons.org/licenses/by-nc-nd/4.0/ |
op_doi |
https://doi.org/10.1002/esp.5811 |
container_title |
Earth Surface Processes and Landforms |
_version_ |
1800743986230460416 |