Past freeze and thaw cycling in the margin of the El'gygytgyn crater deduced from a 141 m long permafrost record
The continuous sediment record from Lake El'gygytgyn in the northeastern Eurasian Arctic spans the last 3.6 Ma and for much of this time permafrost dynamics and lake level changes have likely played a crucial role for sediment delivery to the lake. Changes in the ground-ice hydrochemical compos...
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Copernicus Publications
2014
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Online Access: | https://doi.org/10.5194/cp-10-1109-2014 https://doaj.org/article/36019b1a434447f2b57f21e46bfa8e3b |
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ftdoajarticles:oai:doaj.org/article:36019b1a434447f2b57f21e46bfa8e3b 2023-05-15T15:11:15+02:00 Past freeze and thaw cycling in the margin of the El'gygytgyn crater deduced from a 141 m long permafrost record G. Schwamborn H. Meyer L. Schirrmeister G. Fedorov 2014-06-01T00:00:00Z https://doi.org/10.5194/cp-10-1109-2014 https://doaj.org/article/36019b1a434447f2b57f21e46bfa8e3b EN eng Copernicus Publications http://www.clim-past.net/10/1109/2014/cp-10-1109-2014.pdf https://doaj.org/toc/1814-9324 https://doaj.org/toc/1814-9332 1814-9324 1814-9332 doi:10.5194/cp-10-1109-2014 https://doaj.org/article/36019b1a434447f2b57f21e46bfa8e3b Climate of the Past, Vol 10, Iss 3, Pp 1109-1123 (2014) Environmental pollution TD172-193.5 Environmental protection TD169-171.8 Environmental sciences GE1-350 article 2014 ftdoajarticles https://doi.org/10.5194/cp-10-1109-2014 2022-12-31T04:43:52Z The continuous sediment record from Lake El'gygytgyn in the northeastern Eurasian Arctic spans the last 3.6 Ma and for much of this time permafrost dynamics and lake level changes have likely played a crucial role for sediment delivery to the lake. Changes in the ground-ice hydrochemical composition (δ 18 O, δD, pH, electrical conductivity, Na + , Mg 2+ , Ca 2+ , K + , HCO 3 - , Cl - , SO 4 - ) of a 141 m long permafrost record from the western crater plain are examined to reconstruct repeated periods of freeze and thaw at the lake edge. Stable water isotope and major ion records of ground ice in the permafrost reflect both a synsedimentary palaeo-precipitation signal preserved in the near-surface permafrost (0.0–9.1 m core depth) and a post-depositional record of thawing and refreezing in deeper layers of the core (9.1–141.0 m core depth). These lake marginal permafrost dynamics were controlled by lake level changes that episodically flooded the surfaces and induced thaw in the underlying frozen ground. During times of lake level fall these layers froze over again. At least three cycles of freeze and thaw are identified and the hydrochemical data point to a vertical and horizontal talik refreezing through time. Past permafrost thaw and freeze may have destabilised the basin slopes of Lake El'gygytgyn and this has probably promoted the release of mass movements from the lake edge to the deeper basin as known from frequently occurring turbidite layers in the lake sediment column. Article in Journal/Newspaper Arctic Ice permafrost Directory of Open Access Journals: DOAJ Articles Arctic Talik ENVELOPE(146.601,146.601,59.667,59.667) Lake Marginal ENVELOPE(163.500,163.500,-74.600,-74.600) Western Crater ENVELOPE(167.117,167.117,-77.533,-77.533) Climate of the Past 10 3 1109 1123 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
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 G. Schwamborn H. Meyer L. Schirrmeister G. Fedorov Past freeze and thaw cycling in the margin of the El'gygytgyn crater deduced from a 141 m long permafrost record |
topic_facet |
Environmental pollution TD172-193.5 Environmental protection TD169-171.8 Environmental sciences GE1-350 |
description |
The continuous sediment record from Lake El'gygytgyn in the northeastern Eurasian Arctic spans the last 3.6 Ma and for much of this time permafrost dynamics and lake level changes have likely played a crucial role for sediment delivery to the lake. Changes in the ground-ice hydrochemical composition (δ 18 O, δD, pH, electrical conductivity, Na + , Mg 2+ , Ca 2+ , K + , HCO 3 - , Cl - , SO 4 - ) of a 141 m long permafrost record from the western crater plain are examined to reconstruct repeated periods of freeze and thaw at the lake edge. Stable water isotope and major ion records of ground ice in the permafrost reflect both a synsedimentary palaeo-precipitation signal preserved in the near-surface permafrost (0.0–9.1 m core depth) and a post-depositional record of thawing and refreezing in deeper layers of the core (9.1–141.0 m core depth). These lake marginal permafrost dynamics were controlled by lake level changes that episodically flooded the surfaces and induced thaw in the underlying frozen ground. During times of lake level fall these layers froze over again. At least three cycles of freeze and thaw are identified and the hydrochemical data point to a vertical and horizontal talik refreezing through time. Past permafrost thaw and freeze may have destabilised the basin slopes of Lake El'gygytgyn and this has probably promoted the release of mass movements from the lake edge to the deeper basin as known from frequently occurring turbidite layers in the lake sediment column. |
format |
Article in Journal/Newspaper |
author |
G. Schwamborn H. Meyer L. Schirrmeister G. Fedorov |
author_facet |
G. Schwamborn H. Meyer L. Schirrmeister G. Fedorov |
author_sort |
G. Schwamborn |
title |
Past freeze and thaw cycling in the margin of the El'gygytgyn crater deduced from a 141 m long permafrost record |
title_short |
Past freeze and thaw cycling in the margin of the El'gygytgyn crater deduced from a 141 m long permafrost record |
title_full |
Past freeze and thaw cycling in the margin of the El'gygytgyn crater deduced from a 141 m long permafrost record |
title_fullStr |
Past freeze and thaw cycling in the margin of the El'gygytgyn crater deduced from a 141 m long permafrost record |
title_full_unstemmed |
Past freeze and thaw cycling in the margin of the El'gygytgyn crater deduced from a 141 m long permafrost record |
title_sort |
past freeze and thaw cycling in the margin of the el'gygytgyn crater deduced from a 141 m long permafrost record |
publisher |
Copernicus Publications |
publishDate |
2014 |
url |
https://doi.org/10.5194/cp-10-1109-2014 https://doaj.org/article/36019b1a434447f2b57f21e46bfa8e3b |
long_lat |
ENVELOPE(146.601,146.601,59.667,59.667) ENVELOPE(163.500,163.500,-74.600,-74.600) ENVELOPE(167.117,167.117,-77.533,-77.533) |
geographic |
Arctic Talik Lake Marginal Western Crater |
geographic_facet |
Arctic Talik Lake Marginal Western Crater |
genre |
Arctic Ice permafrost |
genre_facet |
Arctic Ice permafrost |
op_source |
Climate of the Past, Vol 10, Iss 3, Pp 1109-1123 (2014) |
op_relation |
http://www.clim-past.net/10/1109/2014/cp-10-1109-2014.pdf https://doaj.org/toc/1814-9324 https://doaj.org/toc/1814-9332 1814-9324 1814-9332 doi:10.5194/cp-10-1109-2014 https://doaj.org/article/36019b1a434447f2b57f21e46bfa8e3b |
op_doi |
https://doi.org/10.5194/cp-10-1109-2014 |
container_title |
Climate of the Past |
container_volume |
10 |
container_issue |
3 |
container_start_page |
1109 |
op_container_end_page |
1123 |
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1766342130986385408 |