Shallow depositional basins as potential archives of palaeoenvironmental changes in southwestern Greenland over the last 800 years
The Arctic, one of the most sensitive components of the Earth's climate system, experienced pronounced climatic fluctuations during the Late Holocene. In order to obtain a detailed record of past environmental and climatic variability, sedimentary cores from two interconnected infilled depositi...
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crwiley:10.1111/bor.12483 2024-09-15T18:07:45+00:00 Shallow depositional basins as potential archives of palaeoenvironmental changes in southwestern Greenland over the last 800 years Roman, Matěj Chattová, Barbora Lehejček, Jiří Tejnecký, Václav Vondrák, Daniel Luláková, Petra Němeček, Karel Houška, Jakub Drábek, Ondřej Nývlt, Daniel Masarykova Univerzita 2020 http://dx.doi.org/10.1111/bor.12483 https://onlinelibrary.wiley.com/doi/pdf/10.1111/bor.12483 https://onlinelibrary.wiley.com/doi/full-xml/10.1111/bor.12483 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Boreas volume 50, issue 1, page 262-278 ISSN 0300-9483 1502-3885 journal-article 2020 crwiley https://doi.org/10.1111/bor.12483 2024-08-20T04:12:35Z The Arctic, one of the most sensitive components of the Earth's climate system, experienced pronounced climatic fluctuations during the Late Holocene. In order to obtain a detailed record of past environmental and climatic variability, sedimentary cores from two interconnected infilled depositional basins in the Kobbefjord area, southwestern Greenland, were retrieved and subjected to a multi‐proxy investigation. The absolute chronostratigraphy was established through radiocarbon ( 14 C) and short‐lived radioisotope ( 210 Pb, 137 Cs) dating. We also analysed magnetic susceptibility, grain size, X‐ray fluorescence element composition, total content of carbon, nitrogen and sulphur, biogenic silica and diatom assemblages. The palaeoenvironmental reconstruction presented from the upper basin records ~800 years of sedimentation in a former shallow Arctic lake/pond that was modulated by catchment processes and regional hydroclimate. The record is dominated by alternating periods of increased organic and clastic deposition, suggesting warmer/drier and colder/wetter climate, respectively. Comparison of our records with other proxy‐based lacustrine, marine and glacier records and instrumental measurements from Greenland and the North Atlantic reveals common climatic trends, consistent with the inferred North Atlantic Oscillation pattern. Periods at ~800–600, ~320–220 and ~140–30 cal. a BP correspond to the main cold phases. The earliest climatic deterioration coincides with the demise of the nearby Norse Western Settlement. The most recent cold period represents the culmination of the Little Ice Age with the maximum Holocene advances of Greenland glaciers. Ameliorated conditions predominated at ~550–320 and ~220–140 cal. a BP. The evolution of both water bodies is concluded by transition into oligotrophic peat bogs after complete infilling of the basins at ~30 cal. a BP. Despite differences in proxy signals between the coring sites, this study endorses the usefulness of shallow lake/pond sediments from infilled basins for ... Article in Journal/Newspaper glacier Greenland Magnetic susceptibility North Atlantic North Atlantic oscillation Wiley Online Library Boreas 50 1 262 278 |
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Wiley Online Library |
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crwiley |
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English |
description |
The Arctic, one of the most sensitive components of the Earth's climate system, experienced pronounced climatic fluctuations during the Late Holocene. In order to obtain a detailed record of past environmental and climatic variability, sedimentary cores from two interconnected infilled depositional basins in the Kobbefjord area, southwestern Greenland, were retrieved and subjected to a multi‐proxy investigation. The absolute chronostratigraphy was established through radiocarbon ( 14 C) and short‐lived radioisotope ( 210 Pb, 137 Cs) dating. We also analysed magnetic susceptibility, grain size, X‐ray fluorescence element composition, total content of carbon, nitrogen and sulphur, biogenic silica and diatom assemblages. The palaeoenvironmental reconstruction presented from the upper basin records ~800 years of sedimentation in a former shallow Arctic lake/pond that was modulated by catchment processes and regional hydroclimate. The record is dominated by alternating periods of increased organic and clastic deposition, suggesting warmer/drier and colder/wetter climate, respectively. Comparison of our records with other proxy‐based lacustrine, marine and glacier records and instrumental measurements from Greenland and the North Atlantic reveals common climatic trends, consistent with the inferred North Atlantic Oscillation pattern. Periods at ~800–600, ~320–220 and ~140–30 cal. a BP correspond to the main cold phases. The earliest climatic deterioration coincides with the demise of the nearby Norse Western Settlement. The most recent cold period represents the culmination of the Little Ice Age with the maximum Holocene advances of Greenland glaciers. Ameliorated conditions predominated at ~550–320 and ~220–140 cal. a BP. The evolution of both water bodies is concluded by transition into oligotrophic peat bogs after complete infilling of the basins at ~30 cal. a BP. Despite differences in proxy signals between the coring sites, this study endorses the usefulness of shallow lake/pond sediments from infilled basins for ... |
author2 |
Masarykova Univerzita |
format |
Article in Journal/Newspaper |
author |
Roman, Matěj Chattová, Barbora Lehejček, Jiří Tejnecký, Václav Vondrák, Daniel Luláková, Petra Němeček, Karel Houška, Jakub Drábek, Ondřej Nývlt, Daniel |
spellingShingle |
Roman, Matěj Chattová, Barbora Lehejček, Jiří Tejnecký, Václav Vondrák, Daniel Luláková, Petra Němeček, Karel Houška, Jakub Drábek, Ondřej Nývlt, Daniel Shallow depositional basins as potential archives of palaeoenvironmental changes in southwestern Greenland over the last 800 years |
author_facet |
Roman, Matěj Chattová, Barbora Lehejček, Jiří Tejnecký, Václav Vondrák, Daniel Luláková, Petra Němeček, Karel Houška, Jakub Drábek, Ondřej Nývlt, Daniel |
author_sort |
Roman, Matěj |
title |
Shallow depositional basins as potential archives of palaeoenvironmental changes in southwestern Greenland over the last 800 years |
title_short |
Shallow depositional basins as potential archives of palaeoenvironmental changes in southwestern Greenland over the last 800 years |
title_full |
Shallow depositional basins as potential archives of palaeoenvironmental changes in southwestern Greenland over the last 800 years |
title_fullStr |
Shallow depositional basins as potential archives of palaeoenvironmental changes in southwestern Greenland over the last 800 years |
title_full_unstemmed |
Shallow depositional basins as potential archives of palaeoenvironmental changes in southwestern Greenland over the last 800 years |
title_sort |
shallow depositional basins as potential archives of palaeoenvironmental changes in southwestern greenland over the last 800 years |
publisher |
Wiley |
publishDate |
2020 |
url |
http://dx.doi.org/10.1111/bor.12483 https://onlinelibrary.wiley.com/doi/pdf/10.1111/bor.12483 https://onlinelibrary.wiley.com/doi/full-xml/10.1111/bor.12483 |
genre |
glacier Greenland Magnetic susceptibility North Atlantic North Atlantic oscillation |
genre_facet |
glacier Greenland Magnetic susceptibility North Atlantic North Atlantic oscillation |
op_source |
Boreas volume 50, issue 1, page 262-278 ISSN 0300-9483 1502-3885 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/bor.12483 |
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Boreas |
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50 |
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1 |
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262 |
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278 |
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1810445122616164352 |