Multi-proxy evidence of unprecedented hydroclimatic change in a high Arctic proglacial lake: Linnévatnet, Svalbard
ABSTRACTSvalbard is at the forefront of sea ice, marine, and terrestrial environmental change in the Arctic and so can be viewed as an example of what may be expected in other high latitude regions influenced by the North Atlantic Current. However, there are few highly resolved (subdecadal) paleocli...
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2023
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ftdoajarticles:oai:doaj.org/article:4502150a9beb475291506139e578d016 2024-09-15T17:49:03+00:00 Multi-proxy evidence of unprecedented hydroclimatic change in a high Arctic proglacial lake: Linnévatnet, Svalbard Francois Lapointe Michael Retelle Raymond S. Bradley Wesley R. Farnsworth Eivind Støren Timothy Cook Josiane Rosario 2023-12-01T00:00:00Z https://doi.org/10.1080/15230430.2023.2223403 https://doaj.org/article/4502150a9beb475291506139e578d016 EN eng Taylor & Francis Group https://www.tandfonline.com/doi/10.1080/15230430.2023.2223403 https://doaj.org/toc/1523-0430 https://doaj.org/toc/1938-4246 doi:10.1080/15230430.2023.2223403 1938-4246 1523-0430 https://doaj.org/article/4502150a9beb475291506139e578d016 Arctic, Antarctic, and Alpine Research, Vol 55, Iss 1 (2023) Linnévatnet Linnébreen grain size sediment provenance micro-X-ray fluorescence climate Environmental sciences GE1-350 Ecology QH540-549.5 article 2023 ftdoajarticles https://doi.org/10.1080/15230430.2023.2223403 2024-08-05T17:49:40Z ABSTRACTSvalbard is at the forefront of sea ice, marine, and terrestrial environmental change in the Arctic and so can be viewed as an example of what may be expected in other high latitude regions influenced by the North Atlantic Current. However, there are few highly resolved (subdecadal) paleoclimate records from this area that provide a long-term perspective on recent climatic changes. Here, we investigate a new composite sedimentary sequence from Linnévatnet, western Spitsbergen, spanning the last ~2,000 years. The chronology of this new composite laminated sequence is supported by four radiometric dates. Prior to conducting paleoclimate investigations on these lake sediments, we investigated the sediment sources entering Linnévatnet. Sediment samples collected around the lake’s watershed indicate that the main sediment sources come from the eastern carbonate valley wall as well as Linnéelva, the main river system. Micro-X-ray fluorescence (µ-XRF) results indicate that calcium is the largest component of sediment delivered to the delta-proximal basin, where the sedimentary record was collected. Percentage organics deduced from loss-on-ignition measurements reveal an antiphased relationship with calcium and magnetic susceptibility, implying that the sediment loading at the core site is largely modulated by the alternation of calcium derived from carbonates of the eastern flanks of the valley and by coal-bearing sandstone from Linnéelva, derived from the main river inflow that drains the central valley. Linnéelva is mainly fed by snow and glacier meltwaters from Linnébreen, the small valley glacier now located 7 km south of Linnévatnet. Because Linnébreen is underlain by coal-bearing sandstone, organic content in Linnévatnet lake sediments can be used as an indicator of glacier activity. Annually resolved parameters—that is, calcium and grain size—were found to be strongly correlated to temperature inferred from nearby Lomonosovfonna δ18O ice record as well as the wider reconstructed Northern Hemisphere ... Article in Journal/Newspaper Antarctic and Alpine Research Arctic glacier Magnetic susceptibility north atlantic current North Atlantic Sea ice Svalbard Spitsbergen Directory of Open Access Journals: DOAJ Articles Arctic, Antarctic, and Alpine Research 55 1 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Linnévatnet Linnébreen grain size sediment provenance micro-X-ray fluorescence climate Environmental sciences GE1-350 Ecology QH540-549.5 |
spellingShingle |
Linnévatnet Linnébreen grain size sediment provenance micro-X-ray fluorescence climate Environmental sciences GE1-350 Ecology QH540-549.5 Francois Lapointe Michael Retelle Raymond S. Bradley Wesley R. Farnsworth Eivind Støren Timothy Cook Josiane Rosario Multi-proxy evidence of unprecedented hydroclimatic change in a high Arctic proglacial lake: Linnévatnet, Svalbard |
topic_facet |
Linnévatnet Linnébreen grain size sediment provenance micro-X-ray fluorescence climate Environmental sciences GE1-350 Ecology QH540-549.5 |
description |
ABSTRACTSvalbard is at the forefront of sea ice, marine, and terrestrial environmental change in the Arctic and so can be viewed as an example of what may be expected in other high latitude regions influenced by the North Atlantic Current. However, there are few highly resolved (subdecadal) paleoclimate records from this area that provide a long-term perspective on recent climatic changes. Here, we investigate a new composite sedimentary sequence from Linnévatnet, western Spitsbergen, spanning the last ~2,000 years. The chronology of this new composite laminated sequence is supported by four radiometric dates. Prior to conducting paleoclimate investigations on these lake sediments, we investigated the sediment sources entering Linnévatnet. Sediment samples collected around the lake’s watershed indicate that the main sediment sources come from the eastern carbonate valley wall as well as Linnéelva, the main river system. Micro-X-ray fluorescence (µ-XRF) results indicate that calcium is the largest component of sediment delivered to the delta-proximal basin, where the sedimentary record was collected. Percentage organics deduced from loss-on-ignition measurements reveal an antiphased relationship with calcium and magnetic susceptibility, implying that the sediment loading at the core site is largely modulated by the alternation of calcium derived from carbonates of the eastern flanks of the valley and by coal-bearing sandstone from Linnéelva, derived from the main river inflow that drains the central valley. Linnéelva is mainly fed by snow and glacier meltwaters from Linnébreen, the small valley glacier now located 7 km south of Linnévatnet. Because Linnébreen is underlain by coal-bearing sandstone, organic content in Linnévatnet lake sediments can be used as an indicator of glacier activity. Annually resolved parameters—that is, calcium and grain size—were found to be strongly correlated to temperature inferred from nearby Lomonosovfonna δ18O ice record as well as the wider reconstructed Northern Hemisphere ... |
format |
Article in Journal/Newspaper |
author |
Francois Lapointe Michael Retelle Raymond S. Bradley Wesley R. Farnsworth Eivind Støren Timothy Cook Josiane Rosario |
author_facet |
Francois Lapointe Michael Retelle Raymond S. Bradley Wesley R. Farnsworth Eivind Støren Timothy Cook Josiane Rosario |
author_sort |
Francois Lapointe |
title |
Multi-proxy evidence of unprecedented hydroclimatic change in a high Arctic proglacial lake: Linnévatnet, Svalbard |
title_short |
Multi-proxy evidence of unprecedented hydroclimatic change in a high Arctic proglacial lake: Linnévatnet, Svalbard |
title_full |
Multi-proxy evidence of unprecedented hydroclimatic change in a high Arctic proglacial lake: Linnévatnet, Svalbard |
title_fullStr |
Multi-proxy evidence of unprecedented hydroclimatic change in a high Arctic proglacial lake: Linnévatnet, Svalbard |
title_full_unstemmed |
Multi-proxy evidence of unprecedented hydroclimatic change in a high Arctic proglacial lake: Linnévatnet, Svalbard |
title_sort |
multi-proxy evidence of unprecedented hydroclimatic change in a high arctic proglacial lake: linnévatnet, svalbard |
publisher |
Taylor & Francis Group |
publishDate |
2023 |
url |
https://doi.org/10.1080/15230430.2023.2223403 https://doaj.org/article/4502150a9beb475291506139e578d016 |
genre |
Antarctic and Alpine Research Arctic glacier Magnetic susceptibility north atlantic current North Atlantic Sea ice Svalbard Spitsbergen |
genre_facet |
Antarctic and Alpine Research Arctic glacier Magnetic susceptibility north atlantic current North Atlantic Sea ice Svalbard Spitsbergen |
op_source |
Arctic, Antarctic, and Alpine Research, Vol 55, Iss 1 (2023) |
op_relation |
https://www.tandfonline.com/doi/10.1080/15230430.2023.2223403 https://doaj.org/toc/1523-0430 https://doaj.org/toc/1938-4246 doi:10.1080/15230430.2023.2223403 1938-4246 1523-0430 https://doaj.org/article/4502150a9beb475291506139e578d016 |
op_doi |
https://doi.org/10.1080/15230430.2023.2223403 |
container_title |
Arctic, Antarctic, and Alpine Research |
container_volume |
55 |
container_issue |
1 |
_version_ |
1810290751267930112 |