Pliocene to Pleistocene climate and environmental history of Lake El'gygytgyn, Far East Russian Arctic, based on high-resolution inorganic geochemistry data
The 3.6 Ma sediment record of Lake El'gygytgyn/NE Russia, Far East Russian Arctic, represents the longest continuous climate archive of the terrestrial Arctic. Its elemental composition as determined by X-ray fluorescence scanning exhibits significant changes since the mid-Pliocene caused by cl...
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ftdoajarticles:oai:doaj.org/article:634b685efb554241adf4f4a1c2c0f8ac 2023-05-15T14:58:03+02:00 Pliocene to Pleistocene climate and environmental history of Lake El'gygytgyn, Far East Russian Arctic, based on high-resolution inorganic geochemistry data V. Wennrich P. S. Minyuk V. Borkhodoev A. Francke B. Ritter N. R. Nowaczyk M. A. Sauerbrey J. Brigham-Grette M. Melles 2014-07-01T00:00:00Z https://doi.org/10.5194/cp-10-1381-2014 https://doaj.org/article/634b685efb554241adf4f4a1c2c0f8ac EN eng Copernicus Publications http://www.clim-past.net/10/1381/2014/cp-10-1381-2014.pdf https://doaj.org/toc/1814-9324 https://doaj.org/toc/1814-9332 1814-9324 1814-9332 doi:10.5194/cp-10-1381-2014 https://doaj.org/article/634b685efb554241adf4f4a1c2c0f8ac Climate of the Past, Vol 10, Iss 4, Pp 1381-1399 (2014) Environmental pollution TD172-193.5 Environmental protection TD169-171.8 Environmental sciences GE1-350 article 2014 ftdoajarticles https://doi.org/10.5194/cp-10-1381-2014 2022-12-30T21:36:16Z The 3.6 Ma sediment record of Lake El'gygytgyn/NE Russia, Far East Russian Arctic, represents the longest continuous climate archive of the terrestrial Arctic. Its elemental composition as determined by X-ray fluorescence scanning exhibits significant changes since the mid-Pliocene caused by climate-driven variations in primary production, postdepositional diagenetic processes, and lake circulation as well as weathering processes in its catchment. During the mid- to late Pliocene, warmer and wetter climatic conditions are reflected by elevated Si / Ti ratios, indicating enhanced diatom production in the lake. Prior to 3.3 Ma, this signal is overprinted by intensified detrital input from the catchment, visible in maxima of clastic-related proxies, such as K. In addition, calcite formation in the early lake history points to enhanced Ca flux into the lake caused by intensified weathering in the catchment. A lack of calcite deposition after ca. 3.3 Ma is linked to the development of permafrost in the region triggered by cooling in the mid-Pliocene. After ca. 3.0 Ma the elemental data suggest a gradual transition to Pleistocene-style glacial–interglacial cyclicity. In the early Pleistocene, the cyclicity was first dominated by variations on the 41 kyr obliquity band but experienced a change to a 100 kyr eccentricity dominance during the middle Pleistocene transition (MPT) at ca. 1.2–0.6 Ma. This clearly demonstrates the sensitivity of the Lake El'gygytgyn record to orbital forcing. A successive decrease of the baseline levels of the redox-sensitive Mn / Fe ratio and magnetic susceptibility between 2.3 and 1.8 Ma reflects an overall change in the bottom-water oxygenation due to an intensified occurrence of pervasive glacial episodes in the early Pleistocene. The coincidence with major changes in the North Pacific and Bering Sea paleoceanography at ca. 1.8 Ma implies that the change in lake hydrology was caused by a regional cooling in the North Pacific and the western Beringian landmass and/or changes in the ... Article in Journal/Newspaper Arctic Bering Sea Magnetic susceptibility permafrost Directory of Open Access Journals: DOAJ Articles Arctic Bering Sea Pacific Climate of the Past 10 4 1381 1399 |
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Open Polar |
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Directory of Open Access Journals: DOAJ Articles |
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language |
English |
topic |
Environmental pollution TD172-193.5 Environmental protection TD169-171.8 Environmental sciences GE1-350 |
spellingShingle |
Environmental pollution TD172-193.5 Environmental protection TD169-171.8 Environmental sciences GE1-350 V. Wennrich P. S. Minyuk V. Borkhodoev A. Francke B. Ritter N. R. Nowaczyk M. A. Sauerbrey J. Brigham-Grette M. Melles Pliocene to Pleistocene climate and environmental history of Lake El'gygytgyn, Far East Russian Arctic, based on high-resolution inorganic geochemistry data |
topic_facet |
Environmental pollution TD172-193.5 Environmental protection TD169-171.8 Environmental sciences GE1-350 |
description |
The 3.6 Ma sediment record of Lake El'gygytgyn/NE Russia, Far East Russian Arctic, represents the longest continuous climate archive of the terrestrial Arctic. Its elemental composition as determined by X-ray fluorescence scanning exhibits significant changes since the mid-Pliocene caused by climate-driven variations in primary production, postdepositional diagenetic processes, and lake circulation as well as weathering processes in its catchment. During the mid- to late Pliocene, warmer and wetter climatic conditions are reflected by elevated Si / Ti ratios, indicating enhanced diatom production in the lake. Prior to 3.3 Ma, this signal is overprinted by intensified detrital input from the catchment, visible in maxima of clastic-related proxies, such as K. In addition, calcite formation in the early lake history points to enhanced Ca flux into the lake caused by intensified weathering in the catchment. A lack of calcite deposition after ca. 3.3 Ma is linked to the development of permafrost in the region triggered by cooling in the mid-Pliocene. After ca. 3.0 Ma the elemental data suggest a gradual transition to Pleistocene-style glacial–interglacial cyclicity. In the early Pleistocene, the cyclicity was first dominated by variations on the 41 kyr obliquity band but experienced a change to a 100 kyr eccentricity dominance during the middle Pleistocene transition (MPT) at ca. 1.2–0.6 Ma. This clearly demonstrates the sensitivity of the Lake El'gygytgyn record to orbital forcing. A successive decrease of the baseline levels of the redox-sensitive Mn / Fe ratio and magnetic susceptibility between 2.3 and 1.8 Ma reflects an overall change in the bottom-water oxygenation due to an intensified occurrence of pervasive glacial episodes in the early Pleistocene. The coincidence with major changes in the North Pacific and Bering Sea paleoceanography at ca. 1.8 Ma implies that the change in lake hydrology was caused by a regional cooling in the North Pacific and the western Beringian landmass and/or changes in the ... |
format |
Article in Journal/Newspaper |
author |
V. Wennrich P. S. Minyuk V. Borkhodoev A. Francke B. Ritter N. R. Nowaczyk M. A. Sauerbrey J. Brigham-Grette M. Melles |
author_facet |
V. Wennrich P. S. Minyuk V. Borkhodoev A. Francke B. Ritter N. R. Nowaczyk M. A. Sauerbrey J. Brigham-Grette M. Melles |
author_sort |
V. Wennrich |
title |
Pliocene to Pleistocene climate and environmental history of Lake El'gygytgyn, Far East Russian Arctic, based on high-resolution inorganic geochemistry data |
title_short |
Pliocene to Pleistocene climate and environmental history of Lake El'gygytgyn, Far East Russian Arctic, based on high-resolution inorganic geochemistry data |
title_full |
Pliocene to Pleistocene climate and environmental history of Lake El'gygytgyn, Far East Russian Arctic, based on high-resolution inorganic geochemistry data |
title_fullStr |
Pliocene to Pleistocene climate and environmental history of Lake El'gygytgyn, Far East Russian Arctic, based on high-resolution inorganic geochemistry data |
title_full_unstemmed |
Pliocene to Pleistocene climate and environmental history of Lake El'gygytgyn, Far East Russian Arctic, based on high-resolution inorganic geochemistry data |
title_sort |
pliocene to pleistocene climate and environmental history of lake el'gygytgyn, far east russian arctic, based on high-resolution inorganic geochemistry data |
publisher |
Copernicus Publications |
publishDate |
2014 |
url |
https://doi.org/10.5194/cp-10-1381-2014 https://doaj.org/article/634b685efb554241adf4f4a1c2c0f8ac |
geographic |
Arctic Bering Sea Pacific |
geographic_facet |
Arctic Bering Sea Pacific |
genre |
Arctic Bering Sea Magnetic susceptibility permafrost |
genre_facet |
Arctic Bering Sea Magnetic susceptibility permafrost |
op_source |
Climate of the Past, Vol 10, Iss 4, Pp 1381-1399 (2014) |
op_relation |
http://www.clim-past.net/10/1381/2014/cp-10-1381-2014.pdf https://doaj.org/toc/1814-9324 https://doaj.org/toc/1814-9332 1814-9324 1814-9332 doi:10.5194/cp-10-1381-2014 https://doaj.org/article/634b685efb554241adf4f4a1c2c0f8ac |
op_doi |
https://doi.org/10.5194/cp-10-1381-2014 |
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Climate of the Past |
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10 |
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4 |
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1381 |
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1399 |
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1766330137912016896 |