Under-ice limnology of coastal valley lakes at the edge of the Arctic Ocean
The northern coast of Ellesmere Island in the Canadian High Arctic is undergoing amplified warming that parallels the rapid decline in Arctic Ocean sea ice extent, and many lakes in this region have already shown changes in response to warming. However, biogeochemical data from High Arctic freshwate...
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fttriple:oai:gotriple.eu:http://hdl.handle.net/20.500.11794/68504 2023-05-15T14:48:11+02:00 Under-ice limnology of coastal valley lakes at the edge of the Arctic Ocean Klanten, Yohanna Triglav, Katherine Marois, Catherine Antoniades, Dermot Arctique Nunavut -- Ellesmere, Île d' 2021-03-15 https://hdl.handle.net/20.500.11794/68504 en eng Canadian Science Publishing http://hdl.handle.net/20.500.11794/68504 other CorpusUL geo envir Journal Article https://vocabularies.coar-repositories.org/resource_types/c_6501/ 2021 fttriple https://doi.org/20.500.11794/68504 2023-01-22T16:44:28Z The northern coast of Ellesmere Island in the Canadian High Arctic is undergoing amplified warming that parallels the rapid decline in Arctic Ocean sea ice extent, and many lakes in this region have already shown changes in response to warming. However, biogeochemical data from High Arctic freshwaters are limited, and mostly restricted to the short, ice-free period. We sampled four coastal lakes in Stuckberry Valley (82° 54’ N, 66° 56’ W) before the onset of spring melting in 2017, 2018 and 2019, to assess biogeochemical gradients in their water columns and characteristics of their surface sediments. Despite their proximity, there were large differences in limnological properties. The two shallower lakes closer to the ocean were oxygen deficient while the two deeper, more distant lakes were more oxygenated. There were pronounced vertical gradients in major ions, metals and nutrients that suggested large differences in the extent of anaerobic microbial processes among the lakes. Morphometry and dissolved oxygen were the overriding determinants of biogeochemical differences rather than position along this short oceaninland gradient. The diversity of limnological conditions, and the sensitivity of these characteristics to changes in ice cover, underlines the need for further study of under-ice processes in extreme northern lakes. Article in Journal/Newspaper Arctic Arctic Ocean Arctique* Ellesmere Island Nunavut Sea ice Unknown Arctic Arctic Ocean Nunavut Ellesmere Island |
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English |
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geo envir Klanten, Yohanna Triglav, Katherine Marois, Catherine Antoniades, Dermot Under-ice limnology of coastal valley lakes at the edge of the Arctic Ocean |
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geo envir |
description |
The northern coast of Ellesmere Island in the Canadian High Arctic is undergoing amplified warming that parallels the rapid decline in Arctic Ocean sea ice extent, and many lakes in this region have already shown changes in response to warming. However, biogeochemical data from High Arctic freshwaters are limited, and mostly restricted to the short, ice-free period. We sampled four coastal lakes in Stuckberry Valley (82° 54’ N, 66° 56’ W) before the onset of spring melting in 2017, 2018 and 2019, to assess biogeochemical gradients in their water columns and characteristics of their surface sediments. Despite their proximity, there were large differences in limnological properties. The two shallower lakes closer to the ocean were oxygen deficient while the two deeper, more distant lakes were more oxygenated. There were pronounced vertical gradients in major ions, metals and nutrients that suggested large differences in the extent of anaerobic microbial processes among the lakes. Morphometry and dissolved oxygen were the overriding determinants of biogeochemical differences rather than position along this short oceaninland gradient. The diversity of limnological conditions, and the sensitivity of these characteristics to changes in ice cover, underlines the need for further study of under-ice processes in extreme northern lakes. |
format |
Article in Journal/Newspaper |
author |
Klanten, Yohanna Triglav, Katherine Marois, Catherine Antoniades, Dermot |
author_facet |
Klanten, Yohanna Triglav, Katherine Marois, Catherine Antoniades, Dermot |
author_sort |
Klanten, Yohanna |
title |
Under-ice limnology of coastal valley lakes at the edge of the Arctic Ocean |
title_short |
Under-ice limnology of coastal valley lakes at the edge of the Arctic Ocean |
title_full |
Under-ice limnology of coastal valley lakes at the edge of the Arctic Ocean |
title_fullStr |
Under-ice limnology of coastal valley lakes at the edge of the Arctic Ocean |
title_full_unstemmed |
Under-ice limnology of coastal valley lakes at the edge of the Arctic Ocean |
title_sort |
under-ice limnology of coastal valley lakes at the edge of the arctic ocean |
publisher |
Canadian Science Publishing |
publishDate |
2021 |
url |
https://hdl.handle.net/20.500.11794/68504 |
op_coverage |
Arctique Nunavut -- Ellesmere, Île d' |
geographic |
Arctic Arctic Ocean Nunavut Ellesmere Island |
geographic_facet |
Arctic Arctic Ocean Nunavut Ellesmere Island |
genre |
Arctic Arctic Ocean Arctique* Ellesmere Island Nunavut Sea ice |
genre_facet |
Arctic Arctic Ocean Arctique* Ellesmere Island Nunavut Sea ice |
op_source |
CorpusUL |
op_relation |
http://hdl.handle.net/20.500.11794/68504 |
op_rights |
other |
op_doi |
https://doi.org/20.500.11794/68504 |
_version_ |
1766319287273783296 |