Rapid Lacustrine Response to Recent High Arctic Warming: A Diatom Record from Sawtooth Lake, Ellesmere Island, Nunavut.
Diatoms from Sawtooth Lake (79°20′N, 81°51′W) on the Fosheim Peninsula in Central Ellesmere Island, Canada were analyzed to assess the temporal extent and magnitude of climatic change in the High Arctic during the late Holocene. Diatom results from the sediment cores show an absence of diatoms throu...
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ftinrsquebec:oai:espace.inrs.ca:9575 2023-05-15T14:14:42+02:00 Rapid Lacustrine Response to Recent High Arctic Warming: A Diatom Record from Sawtooth Lake, Ellesmere Island, Nunavut. Perren, Bianca B. Bradley, Raymond S. Francus, Pierre 2003 application/pdf https://espace.inrs.ca/id/eprint/9575/ https://espace.inrs.ca/id/eprint/9575/1/P1104.pdf https://doi.org/10.1657/1523-0430(2003)035[0271:RLRTRH]2.0.CO;2 en eng https://espace.inrs.ca/id/eprint/9575/1/P1104.pdf Perren, Bianca B., Bradley, Raymond S. et Francus, Pierre (2003). Rapid Lacustrine Response to Recent High Arctic Warming: A Diatom Record from Sawtooth Lake, Ellesmere Island, Nunavut. Arctic, Antarctic, and Alpine Research , vol. 35 , nº 3. p. 271-278. DOI:10.1657/1523-0430(2003)035[0271:RLRTRH]2.0.CO;2 <https://doi.org/10.1657/1523-0430%282003%29035%5B0271%3ARLRTRH%5D2.0.CO%3B2>. doi:10.1657/1523-0430(2003)035[0271:RLRTRH]2.0.CO;2 réchauffement climatique Extrême-Arctique Nunavut Article Évalué par les pairs 2003 ftinrsquebec https://doi.org/10.1657/1523-0430(2003)035[0271:RLRTRH]2.0.CO;2 2023-02-10T11:45:40Z Diatoms from Sawtooth Lake (79°20′N, 81°51′W) on the Fosheim Peninsula in Central Ellesmere Island, Canada were analyzed to assess the temporal extent and magnitude of climatic change in the High Arctic during the late Holocene. Diatom results from the sediment cores show an absence of diatoms throughout the last ∼2.5 ka (4.6 m) until the 1920s. However, ca. 1926 (5.3-cm depth), a rapid colonization of diatoms in the lake occurred. Within the uppermost section of the core (∼1920 to ∼1997), the diatom flora shift from a small Fragilaria-dominated assemblage to a more diverse assemblage that is dominated by large planktonic taxa (e.g., Cyclotella bodanica) and large raphid benthic species. The postglacial nature of this assemblage suggests a decrease in ice cover and a concomitant increase in light and nutrient availability for diatom growth over the last ∼75 yr. Of particular significance is this absence of diatoms prior to the ∼1920s, which indicates that environmental conditions of the last ∼75 yr are unlike any of the previous ∼2500 yr. Article in Journal/Newspaper Antarctic and Alpine Research Arctic Arctic Arctique* Ellesmere Island Fosheim Peninsula Nunavut Institut national de la recherche scientifique, Québec: Espace INRS Arctic Nunavut Ellesmere Island Canada Fosheim Peninsula ENVELOPE(-83.749,-83.749,79.669,79.669) |
institution |
Open Polar |
collection |
Institut national de la recherche scientifique, Québec: Espace INRS |
op_collection_id |
ftinrsquebec |
language |
English |
topic |
réchauffement climatique Extrême-Arctique Nunavut |
spellingShingle |
réchauffement climatique Extrême-Arctique Nunavut Perren, Bianca B. Bradley, Raymond S. Francus, Pierre Rapid Lacustrine Response to Recent High Arctic Warming: A Diatom Record from Sawtooth Lake, Ellesmere Island, Nunavut. |
topic_facet |
réchauffement climatique Extrême-Arctique Nunavut |
description |
Diatoms from Sawtooth Lake (79°20′N, 81°51′W) on the Fosheim Peninsula in Central Ellesmere Island, Canada were analyzed to assess the temporal extent and magnitude of climatic change in the High Arctic during the late Holocene. Diatom results from the sediment cores show an absence of diatoms throughout the last ∼2.5 ka (4.6 m) until the 1920s. However, ca. 1926 (5.3-cm depth), a rapid colonization of diatoms in the lake occurred. Within the uppermost section of the core (∼1920 to ∼1997), the diatom flora shift from a small Fragilaria-dominated assemblage to a more diverse assemblage that is dominated by large planktonic taxa (e.g., Cyclotella bodanica) and large raphid benthic species. The postglacial nature of this assemblage suggests a decrease in ice cover and a concomitant increase in light and nutrient availability for diatom growth over the last ∼75 yr. Of particular significance is this absence of diatoms prior to the ∼1920s, which indicates that environmental conditions of the last ∼75 yr are unlike any of the previous ∼2500 yr. |
format |
Article in Journal/Newspaper |
author |
Perren, Bianca B. Bradley, Raymond S. Francus, Pierre |
author_facet |
Perren, Bianca B. Bradley, Raymond S. Francus, Pierre |
author_sort |
Perren, Bianca B. |
title |
Rapid Lacustrine Response to Recent High Arctic Warming: A Diatom Record from Sawtooth Lake, Ellesmere Island, Nunavut. |
title_short |
Rapid Lacustrine Response to Recent High Arctic Warming: A Diatom Record from Sawtooth Lake, Ellesmere Island, Nunavut. |
title_full |
Rapid Lacustrine Response to Recent High Arctic Warming: A Diatom Record from Sawtooth Lake, Ellesmere Island, Nunavut. |
title_fullStr |
Rapid Lacustrine Response to Recent High Arctic Warming: A Diatom Record from Sawtooth Lake, Ellesmere Island, Nunavut. |
title_full_unstemmed |
Rapid Lacustrine Response to Recent High Arctic Warming: A Diatom Record from Sawtooth Lake, Ellesmere Island, Nunavut. |
title_sort |
rapid lacustrine response to recent high arctic warming: a diatom record from sawtooth lake, ellesmere island, nunavut. |
publishDate |
2003 |
url |
https://espace.inrs.ca/id/eprint/9575/ https://espace.inrs.ca/id/eprint/9575/1/P1104.pdf https://doi.org/10.1657/1523-0430(2003)035[0271:RLRTRH]2.0.CO;2 |
long_lat |
ENVELOPE(-83.749,-83.749,79.669,79.669) |
geographic |
Arctic Nunavut Ellesmere Island Canada Fosheim Peninsula |
geographic_facet |
Arctic Nunavut Ellesmere Island Canada Fosheim Peninsula |
genre |
Antarctic and Alpine Research Arctic Arctic Arctique* Ellesmere Island Fosheim Peninsula Nunavut |
genre_facet |
Antarctic and Alpine Research Arctic Arctic Arctique* Ellesmere Island Fosheim Peninsula Nunavut |
op_relation |
https://espace.inrs.ca/id/eprint/9575/1/P1104.pdf Perren, Bianca B., Bradley, Raymond S. et Francus, Pierre (2003). Rapid Lacustrine Response to Recent High Arctic Warming: A Diatom Record from Sawtooth Lake, Ellesmere Island, Nunavut. Arctic, Antarctic, and Alpine Research , vol. 35 , nº 3. p. 271-278. DOI:10.1657/1523-0430(2003)035[0271:RLRTRH]2.0.CO;2 <https://doi.org/10.1657/1523-0430%282003%29035%5B0271%3ARLRTRH%5D2.0.CO%3B2>. doi:10.1657/1523-0430(2003)035[0271:RLRTRH]2.0.CO;2 |
op_doi |
https://doi.org/10.1657/1523-0430(2003)035[0271:RLRTRH]2.0.CO;2 |
_version_ |
1766287019199168512 |