Chronology and sedimentology of a new 2.9 ka annually laminated record from South Sawtooth Lake, Ellesmere Island.
La transcription des symboles et des caractères spéciaux utilisés dans la version originale de ce résumé n’a pas été possible en raison de limitations techniques. La version correcte de ce résumé peut être lue en PDF. Few annually laminated (varved) lacustrine records exist in the Arctic, but these...
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ftinrsquebec:oai:espace.inrs.ca:9704 2023-05-15T14:53:10+02:00 Chronology and sedimentology of a new 2.9 ka annually laminated record from South Sawtooth Lake, Ellesmere Island. Lapointe, François Francus, Pierre Stoner, Joseph Abbott, Mark B. Balascio, Nicholas L. Cook, Timothy L. Bradley, Raymond S. Forman, Steven L. Besonen, Mark R. St-Onge, Guillaume 2019 application/pdf https://espace.inrs.ca/id/eprint/9704/ https://espace.inrs.ca/id/eprint/9704/1/P3629.pdf https://doi.org/10.1016/j.quascirev.2019.105875 en eng https://espace.inrs.ca/id/eprint/9704/1/P3629.pdf Lapointe, François, Francus, Pierre orcid:0000-0001-5465-1966 , Stoner, Joseph, Abbott, Mark B., Balascio, Nicholas L., Cook, Timothy L., Bradley, Raymond S., Forman, Steven L., Besonen, Mark R. et St-Onge, Guillaume (2019). Chronology and sedimentology of a new 2.9 ka annually laminated record from South Sawtooth Lake, Ellesmere Island. Quaternary Science Reviews , vol. 222 . p. 105875. DOI:10.1016/j.quascirev.2019.105875 <https://doi.org/10.1016/j.quascirev.2019.105875>. doi:10.1016/j.quascirev.2019.105875 cc_by_nc_nd_4 CC-BY-NC-ND holocene Arctic climate varves paleoclimatology chronology paleomagnetism Article Évalué par les pairs 2019 ftinrsquebec https://doi.org/10.1016/j.quascirev.2019.105875 2023-02-10T11:45:44Z La transcription des symboles et des caractères spéciaux utilisés dans la version originale de ce résumé n’a pas été possible en raison de limitations techniques. La version correcte de ce résumé peut être lue en PDF. Few annually laminated (varved) lacustrine records exist in the Arctic, but these high-resolution climate archives are needed to better understand abrupt climate change and the natural mode of climate variability of this sensitive region. This paper presents a new high-resolution 2900-year long varved lake sediment record from the Fosheim Peninsula, Ellesmere Island. The varve chronology is based on multiple varve counts made on high-resolution scanning electron microscope images of overlapping sediment thin sections, and is supported by several independent dating techniques, including 137Cs and 210Pb analysis, one optically stimulated luminescence age located close to the bottom of the composite sequence, and comparison between paleomagnetic variations of this record and the longest High-Arctic varve record, Lower Murray Lake, which confirms the reliability of the Sawtooth chronology. High-resolution backscattered images examined under a scanning electron microscope (SEM) were crucial to giving a more detailed view of sedimentation processes in the lake and thus help to delineate varves more precisely than in conventional image analysis. Fine-scale geochemical analysis reveals that lake sedimentation is mainly clastic and that elemental geochemistry is influenced by grain-size. Principal component analysis of multiple proxies and the coarse grain-size fraction of South Sawtooth Lake display similar fluctuations to the nearby Agassiz Ice Cap ∂18O record, including lower values during the Little Ice Age cold period. These results show this new high-resolution and continuous record has a reliable varve chronology and is sensitive to temperature variability. South Sawtooth Lake's mean sedimentation rate of 1.67 mm a−1 is higher than any other sedimentary sequence in the High Arctic providing a unique ... Article in Journal/Newspaper Arctic Climate change Ellesmere Island Fosheim Peninsula Ice cap Institut national de la recherche scientifique, Québec: Espace INRS Arctic Ellesmere Island Fosheim Peninsula ENVELOPE(-83.749,-83.749,79.669,79.669) Agassiz Ice Cap ENVELOPE(-75.996,-75.996,80.252,80.252) Quaternary Science Reviews 222 105875 |
institution |
Open Polar |
collection |
Institut national de la recherche scientifique, Québec: Espace INRS |
op_collection_id |
ftinrsquebec |
language |
English |
topic |
holocene Arctic climate varves paleoclimatology chronology paleomagnetism |
spellingShingle |
holocene Arctic climate varves paleoclimatology chronology paleomagnetism Lapointe, François Francus, Pierre Stoner, Joseph Abbott, Mark B. Balascio, Nicholas L. Cook, Timothy L. Bradley, Raymond S. Forman, Steven L. Besonen, Mark R. St-Onge, Guillaume Chronology and sedimentology of a new 2.9 ka annually laminated record from South Sawtooth Lake, Ellesmere Island. |
topic_facet |
holocene Arctic climate varves paleoclimatology chronology paleomagnetism |
description |
La transcription des symboles et des caractères spéciaux utilisés dans la version originale de ce résumé n’a pas été possible en raison de limitations techniques. La version correcte de ce résumé peut être lue en PDF. Few annually laminated (varved) lacustrine records exist in the Arctic, but these high-resolution climate archives are needed to better understand abrupt climate change and the natural mode of climate variability of this sensitive region. This paper presents a new high-resolution 2900-year long varved lake sediment record from the Fosheim Peninsula, Ellesmere Island. The varve chronology is based on multiple varve counts made on high-resolution scanning electron microscope images of overlapping sediment thin sections, and is supported by several independent dating techniques, including 137Cs and 210Pb analysis, one optically stimulated luminescence age located close to the bottom of the composite sequence, and comparison between paleomagnetic variations of this record and the longest High-Arctic varve record, Lower Murray Lake, which confirms the reliability of the Sawtooth chronology. High-resolution backscattered images examined under a scanning electron microscope (SEM) were crucial to giving a more detailed view of sedimentation processes in the lake and thus help to delineate varves more precisely than in conventional image analysis. Fine-scale geochemical analysis reveals that lake sedimentation is mainly clastic and that elemental geochemistry is influenced by grain-size. Principal component analysis of multiple proxies and the coarse grain-size fraction of South Sawtooth Lake display similar fluctuations to the nearby Agassiz Ice Cap ∂18O record, including lower values during the Little Ice Age cold period. These results show this new high-resolution and continuous record has a reliable varve chronology and is sensitive to temperature variability. South Sawtooth Lake's mean sedimentation rate of 1.67 mm a−1 is higher than any other sedimentary sequence in the High Arctic providing a unique ... |
format |
Article in Journal/Newspaper |
author |
Lapointe, François Francus, Pierre Stoner, Joseph Abbott, Mark B. Balascio, Nicholas L. Cook, Timothy L. Bradley, Raymond S. Forman, Steven L. Besonen, Mark R. St-Onge, Guillaume |
author_facet |
Lapointe, François Francus, Pierre Stoner, Joseph Abbott, Mark B. Balascio, Nicholas L. Cook, Timothy L. Bradley, Raymond S. Forman, Steven L. Besonen, Mark R. St-Onge, Guillaume |
author_sort |
Lapointe, François |
title |
Chronology and sedimentology of a new 2.9 ka annually laminated record from South Sawtooth Lake, Ellesmere Island. |
title_short |
Chronology and sedimentology of a new 2.9 ka annually laminated record from South Sawtooth Lake, Ellesmere Island. |
title_full |
Chronology and sedimentology of a new 2.9 ka annually laminated record from South Sawtooth Lake, Ellesmere Island. |
title_fullStr |
Chronology and sedimentology of a new 2.9 ka annually laminated record from South Sawtooth Lake, Ellesmere Island. |
title_full_unstemmed |
Chronology and sedimentology of a new 2.9 ka annually laminated record from South Sawtooth Lake, Ellesmere Island. |
title_sort |
chronology and sedimentology of a new 2.9 ka annually laminated record from south sawtooth lake, ellesmere island. |
publishDate |
2019 |
url |
https://espace.inrs.ca/id/eprint/9704/ https://espace.inrs.ca/id/eprint/9704/1/P3629.pdf https://doi.org/10.1016/j.quascirev.2019.105875 |
long_lat |
ENVELOPE(-83.749,-83.749,79.669,79.669) ENVELOPE(-75.996,-75.996,80.252,80.252) |
geographic |
Arctic Ellesmere Island Fosheim Peninsula Agassiz Ice Cap |
geographic_facet |
Arctic Ellesmere Island Fosheim Peninsula Agassiz Ice Cap |
genre |
Arctic Climate change Ellesmere Island Fosheim Peninsula Ice cap |
genre_facet |
Arctic Climate change Ellesmere Island Fosheim Peninsula Ice cap |
op_relation |
https://espace.inrs.ca/id/eprint/9704/1/P3629.pdf Lapointe, François, Francus, Pierre orcid:0000-0001-5465-1966 , Stoner, Joseph, Abbott, Mark B., Balascio, Nicholas L., Cook, Timothy L., Bradley, Raymond S., Forman, Steven L., Besonen, Mark R. et St-Onge, Guillaume (2019). Chronology and sedimentology of a new 2.9 ka annually laminated record from South Sawtooth Lake, Ellesmere Island. Quaternary Science Reviews , vol. 222 . p. 105875. DOI:10.1016/j.quascirev.2019.105875 <https://doi.org/10.1016/j.quascirev.2019.105875>. doi:10.1016/j.quascirev.2019.105875 |
op_rights |
cc_by_nc_nd_4 |
op_rightsnorm |
CC-BY-NC-ND |
op_doi |
https://doi.org/10.1016/j.quascirev.2019.105875 |
container_title |
Quaternary Science Reviews |
container_volume |
222 |
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105875 |
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