Multi-proxy evidence of unprecedented hydroclimatic change in a high Arctic proglacial lake: Linnévatnet, Svalbard
Svalbard 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 rec...
Published in: | Arctic, Antarctic, and Alpine Research |
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2023
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Online Access: | https://hdl.handle.net/11250/3084016 https://doi.org/10.1080/15230430.2023.2223403 |
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ftunivbergen:oai:bora.uib.no:11250/3084016 2023-09-05T13:15:26+02:00 Multi-proxy evidence of unprecedented hydroclimatic change in a high Arctic proglacial lake: Linnévatnet, Svalbard Lapointe, Francois Retelle, Michael J. Bradley, Raymond S. Farnsworth, Wesley R. Støren, Eivind Cook, Timothy Rosario, Josiane 2023 application/pdf https://hdl.handle.net/11250/3084016 https://doi.org/10.1080/15230430.2023.2223403 eng eng Taylor & Francis urn:issn:1523-0430 https://hdl.handle.net/11250/3084016 https://doi.org/10.1080/15230430.2023.2223403 cristin:2163491 Arctic, Antarctic and Alpine research. 2023, 55 (1), 2223403. Navngivelse 4.0 Internasjonal http://creativecommons.org/licenses/by/4.0/deed.no Copyright 2023 The Author(s) 2223403 Arctic, Antarctic and Alpine research 55 1 Journal article Peer reviewed 2023 ftunivbergen https://doi.org/10.1080/15230430.2023.2223403 2023-08-16T23:07:22Z Svalbard 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 winter ... Article in Journal/Newspaper Antarctic and Alpine Research Arctic Arctic glacier Magnetic susceptibility north atlantic current North Atlantic Sea ice Svalbard Spitsbergen University of Bergen: Bergen Open Research Archive (BORA-UiB) Arctic Svalbard Lomonosovfonna ENVELOPE(17.663,17.663,78.774,78.774) Linnévatnet ENVELOPE(13.824,13.824,78.042,78.042) Linnébreen ENVELOPE(13.933,13.933,77.967,77.967) Linnéelva ENVELOPE(13.751,13.751,78.077,78.077) Arctic, Antarctic, and Alpine Research 55 1 |
institution |
Open Polar |
collection |
University of Bergen: Bergen Open Research Archive (BORA-UiB) |
op_collection_id |
ftunivbergen |
language |
English |
description |
Svalbard 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 winter ... |
format |
Article in Journal/Newspaper |
author |
Lapointe, Francois Retelle, Michael J. Bradley, Raymond S. Farnsworth, Wesley R. Støren, Eivind Cook, Timothy Rosario, Josiane |
spellingShingle |
Lapointe, Francois Retelle, Michael J. Bradley, Raymond S. Farnsworth, Wesley R. Støren, Eivind Cook, Timothy Rosario, Josiane Multi-proxy evidence of unprecedented hydroclimatic change in a high Arctic proglacial lake: Linnévatnet, Svalbard |
author_facet |
Lapointe, Francois Retelle, Michael J. Bradley, Raymond S. Farnsworth, Wesley R. Støren, Eivind Cook, Timothy Rosario, Josiane |
author_sort |
Lapointe, Francois |
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 |
publishDate |
2023 |
url |
https://hdl.handle.net/11250/3084016 https://doi.org/10.1080/15230430.2023.2223403 |
long_lat |
ENVELOPE(17.663,17.663,78.774,78.774) ENVELOPE(13.824,13.824,78.042,78.042) ENVELOPE(13.933,13.933,77.967,77.967) ENVELOPE(13.751,13.751,78.077,78.077) |
geographic |
Arctic Svalbard Lomonosovfonna Linnévatnet Linnébreen Linnéelva |
geographic_facet |
Arctic Svalbard Lomonosovfonna Linnévatnet Linnébreen Linnéelva |
genre |
Antarctic and Alpine Research Arctic Arctic glacier Magnetic susceptibility north atlantic current North Atlantic Sea ice Svalbard Spitsbergen |
genre_facet |
Antarctic and Alpine Research Arctic Arctic glacier Magnetic susceptibility north atlantic current North Atlantic Sea ice Svalbard Spitsbergen |
op_source |
2223403 Arctic, Antarctic and Alpine research 55 1 |
op_relation |
urn:issn:1523-0430 https://hdl.handle.net/11250/3084016 https://doi.org/10.1080/15230430.2023.2223403 cristin:2163491 Arctic, Antarctic and Alpine research. 2023, 55 (1), 2223403. |
op_rights |
Navngivelse 4.0 Internasjonal http://creativecommons.org/licenses/by/4.0/deed.no Copyright 2023 The Author(s) |
op_doi |
https://doi.org/10.1080/15230430.2023.2223403 |
container_title |
Arctic, Antarctic, and Alpine Research |
container_volume |
55 |
container_issue |
1 |
_version_ |
1776197257727574016 |