Past freeze and thaw cycling in the margin of the El'gygytgyn crater deduced from a 141 m long permafrost record
he 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 composi...
Published in: | Climate of the Past |
---|---|
Main Authors: | , , , |
Format: | Article in Journal/Newspaper |
Language: | unknown |
Published: |
COPERNICUS GESELLSCHAFT MBH
2014
|
Subjects: | |
Online Access: | https://epic.awi.de/id/eprint/35736/ https://epic.awi.de/id/eprint/35736/1/cp-10-1109-2014.pdf http://www.clim-past.net/10/1109/2014/cp-10-1109-2014.html https://hdl.handle.net/10013/epic.43671 https://hdl.handle.net/10013/epic.43671.d001 |
id |
ftawi:oai:epic.awi.de:35736 |
---|---|
record_format |
openpolar |
spelling |
ftawi:oai:epic.awi.de:35736 2023-05-15T15:09:28+02:00 Past freeze and thaw cycling in the margin of the El'gygytgyn crater deduced from a 141 m long permafrost record Schwamborn, Georg Meyer, Hanno Schirrmeister, Lutz Fedorov, G. 2014 application/pdf https://epic.awi.de/id/eprint/35736/ https://epic.awi.de/id/eprint/35736/1/cp-10-1109-2014.pdf http://www.clim-past.net/10/1109/2014/cp-10-1109-2014.html https://hdl.handle.net/10013/epic.43671 https://hdl.handle.net/10013/epic.43671.d001 unknown COPERNICUS GESELLSCHAFT MBH https://epic.awi.de/id/eprint/35736/1/cp-10-1109-2014.pdf https://hdl.handle.net/10013/epic.43671.d001 Schwamborn, G. , Meyer, H. orcid:0000-0003-4129-4706 , Schirrmeister, L. orcid:0000-0001-9455-0596 and Fedorov, G. (2014) Past freeze and thaw cycling in the margin of the El'gygytgyn crater deduced from a 141 m long permafrost record , Climate of the Past, 10 , pp. 1109-1123 . doi:10.5194/cp-10-1109-2014 <https://doi.org/10.5194/cp-10-1109-2014> , hdl:10013/epic.43671 EPIC3Climate of the Past, COPERNICUS GESELLSCHAFT MBH, 10, pp. 1109-1123, ISSN: 1814-9324 Article isiRev 2014 ftawi https://doi.org/10.5194/cp-10-1109-2014 2021-12-24T15:39:38Z he 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 (δ18O, δD, pH, electrical conductivity, Na+, Mg2+, Ca2+, K+, HCO3-, Cl-, SO4-) 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 Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) Arctic Lake Marginal ENVELOPE(163.500,163.500,-74.600,-74.600) Talik ENVELOPE(146.601,146.601,59.667,59.667) Western Crater ENVELOPE(167.117,167.117,-77.533,-77.533) Climate of the Past 10 3 1109 1123 |
institution |
Open Polar |
collection |
Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
op_collection_id |
ftawi |
language |
unknown |
description |
he 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 (δ18O, δD, pH, electrical conductivity, Na+, Mg2+, Ca2+, K+, HCO3-, Cl-, SO4-) 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 |
Schwamborn, Georg Meyer, Hanno Schirrmeister, Lutz Fedorov, G. |
spellingShingle |
Schwamborn, Georg Meyer, Hanno Schirrmeister, Lutz Fedorov, G. Past freeze and thaw cycling in the margin of the El'gygytgyn crater deduced from a 141 m long permafrost record |
author_facet |
Schwamborn, Georg Meyer, Hanno Schirrmeister, Lutz Fedorov, G. |
author_sort |
Schwamborn, Georg |
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 GESELLSCHAFT MBH |
publishDate |
2014 |
url |
https://epic.awi.de/id/eprint/35736/ https://epic.awi.de/id/eprint/35736/1/cp-10-1109-2014.pdf http://www.clim-past.net/10/1109/2014/cp-10-1109-2014.html https://hdl.handle.net/10013/epic.43671 https://hdl.handle.net/10013/epic.43671.d001 |
long_lat |
ENVELOPE(163.500,163.500,-74.600,-74.600) ENVELOPE(146.601,146.601,59.667,59.667) ENVELOPE(167.117,167.117,-77.533,-77.533) |
geographic |
Arctic Lake Marginal Talik Western Crater |
geographic_facet |
Arctic Lake Marginal Talik Western Crater |
genre |
Arctic Ice permafrost |
genre_facet |
Arctic Ice permafrost |
op_source |
EPIC3Climate of the Past, COPERNICUS GESELLSCHAFT MBH, 10, pp. 1109-1123, ISSN: 1814-9324 |
op_relation |
https://epic.awi.de/id/eprint/35736/1/cp-10-1109-2014.pdf https://hdl.handle.net/10013/epic.43671.d001 Schwamborn, G. , Meyer, H. orcid:0000-0003-4129-4706 , Schirrmeister, L. orcid:0000-0001-9455-0596 and Fedorov, G. (2014) Past freeze and thaw cycling in the margin of the El'gygytgyn crater deduced from a 141 m long permafrost record , Climate of the Past, 10 , pp. 1109-1123 . doi:10.5194/cp-10-1109-2014 <https://doi.org/10.5194/cp-10-1109-2014> , hdl:10013/epic.43671 |
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 |
_version_ |
1766340664013881344 |