Palaeoclimate characteristics in interior Siberia of MIS 6–2: first insights from the Batagay permafrost mega-thaw slump in the Yana Highlands
Syngenetic permafrost deposits formed extensively on and around the arising Beringian subcontinent during the Late Pleistocene sea level lowstands. Syngenetic deposition implies that all material, both mineral and organic, freezes parallel to sedimentation and remains frozen until degradation of the...
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Copernicus Publications
2017
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Online Access: | https://doi.org/10.5194/cp-13-795-2017 https://www.clim-past.net/13/795/2017/cp-13-795-2017.pdf https://doaj.org/article/b3aaae908d75434182eb9669e90abf2e |
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fttriple:oai:gotriple.eu:oai:doaj.org/article:b3aaae908d75434182eb9669e90abf2e 2023-05-15T16:36:48+02:00 Palaeoclimate characteristics in interior Siberia of MIS 6–2: first insights from the Batagay permafrost mega-thaw slump in the Yana Highlands K. Ashastina L. Schirrmeister M. Fuchs F. Kienast 2017-07-01 https://doi.org/10.5194/cp-13-795-2017 https://www.clim-past.net/13/795/2017/cp-13-795-2017.pdf https://doaj.org/article/b3aaae908d75434182eb9669e90abf2e en eng Copernicus Publications doi:10.5194/cp-13-795-2017 1814-9324 1814-9332 https://www.clim-past.net/13/795/2017/cp-13-795-2017.pdf https://doaj.org/article/b3aaae908d75434182eb9669e90abf2e undefined Climate of the Past, Vol 13, Pp 795-818 (2017) geo envir Journal Article https://vocabularies.coar-repositories.org/resource_types/c_6501/ 2017 fttriple https://doi.org/10.5194/cp-13-795-2017 2023-01-22T18:10:35Z Syngenetic permafrost deposits formed extensively on and around the arising Beringian subcontinent during the Late Pleistocene sea level lowstands. Syngenetic deposition implies that all material, both mineral and organic, freezes parallel to sedimentation and remains frozen until degradation of the permafrost. Permafrost is therefore a unique archive of Late Pleistocene palaeoclimate. Most studied permafrost outcrops are situated in the coastal lowlands of northeastern Siberia; inland sections are, however, scarcely available. Here, we describe the stratigraphical, cryolithological, and geochronological characteristics of a permafrost sequence near Batagay in the Siberian Yana Highlands, the interior of the Sakha Republic (Yakutia), Russia, with focus on the Late Pleistocene Yedoma ice complex (YIC). The recently formed Batagay mega-thaw slump exposes permafrost deposits to a depth of up to 80 m and gives insight into a climate record close to Verkhoyansk, which has the most severe continental climate in the Northern Hemisphere. Geochronological dating (optically stimulated luminescence, OSL, and 14C ages) and stratigraphic implications delivered a temporal frame from the Middle Pleistocene to the Holocene for our sedimentological interpretations and also revealed interruptions in the deposition. The sequence of lithological units indicates a succession of several distinct climate phases: a Middle Pleistocene ice complex indicates cold stage climate. Then, ice wedge growth stopped due to highly increased sedimentation rates and eventually a rise in temperature. Full interglacial climate conditions existed during accumulation of an organic-rich layer – plant macrofossils reflected open forest vegetation existing under dry conditions during Marine Isotope Stage (MIS) 5e. The Late Pleistocene YIC (MIS 4–MIS 2) suggests severe cold-stage climate conditions. No alas deposits, potentially indicating thermokarst processes, were detected at the site. A detailed comparison of the permafrost deposits exposed in the ... Article in Journal/Newspaper Ice permafrost Sakha Sakha Republic Thermokarst wedge* Yakutia Siberia Unknown Sakha Verkhoyansk ENVELOPE(133.400,133.400,67.544,67.544) Climate of the Past 13 7 795 818 |
institution |
Open Polar |
collection |
Unknown |
op_collection_id |
fttriple |
language |
English |
topic |
geo envir |
spellingShingle |
geo envir K. Ashastina L. Schirrmeister M. Fuchs F. Kienast Palaeoclimate characteristics in interior Siberia of MIS 6–2: first insights from the Batagay permafrost mega-thaw slump in the Yana Highlands |
topic_facet |
geo envir |
description |
Syngenetic permafrost deposits formed extensively on and around the arising Beringian subcontinent during the Late Pleistocene sea level lowstands. Syngenetic deposition implies that all material, both mineral and organic, freezes parallel to sedimentation and remains frozen until degradation of the permafrost. Permafrost is therefore a unique archive of Late Pleistocene palaeoclimate. Most studied permafrost outcrops are situated in the coastal lowlands of northeastern Siberia; inland sections are, however, scarcely available. Here, we describe the stratigraphical, cryolithological, and geochronological characteristics of a permafrost sequence near Batagay in the Siberian Yana Highlands, the interior of the Sakha Republic (Yakutia), Russia, with focus on the Late Pleistocene Yedoma ice complex (YIC). The recently formed Batagay mega-thaw slump exposes permafrost deposits to a depth of up to 80 m and gives insight into a climate record close to Verkhoyansk, which has the most severe continental climate in the Northern Hemisphere. Geochronological dating (optically stimulated luminescence, OSL, and 14C ages) and stratigraphic implications delivered a temporal frame from the Middle Pleistocene to the Holocene for our sedimentological interpretations and also revealed interruptions in the deposition. The sequence of lithological units indicates a succession of several distinct climate phases: a Middle Pleistocene ice complex indicates cold stage climate. Then, ice wedge growth stopped due to highly increased sedimentation rates and eventually a rise in temperature. Full interglacial climate conditions existed during accumulation of an organic-rich layer – plant macrofossils reflected open forest vegetation existing under dry conditions during Marine Isotope Stage (MIS) 5e. The Late Pleistocene YIC (MIS 4–MIS 2) suggests severe cold-stage climate conditions. No alas deposits, potentially indicating thermokarst processes, were detected at the site. A detailed comparison of the permafrost deposits exposed in the ... |
format |
Article in Journal/Newspaper |
author |
K. Ashastina L. Schirrmeister M. Fuchs F. Kienast |
author_facet |
K. Ashastina L. Schirrmeister M. Fuchs F. Kienast |
author_sort |
K. Ashastina |
title |
Palaeoclimate characteristics in interior Siberia of MIS 6–2: first insights from the Batagay permafrost mega-thaw slump in the Yana Highlands |
title_short |
Palaeoclimate characteristics in interior Siberia of MIS 6–2: first insights from the Batagay permafrost mega-thaw slump in the Yana Highlands |
title_full |
Palaeoclimate characteristics in interior Siberia of MIS 6–2: first insights from the Batagay permafrost mega-thaw slump in the Yana Highlands |
title_fullStr |
Palaeoclimate characteristics in interior Siberia of MIS 6–2: first insights from the Batagay permafrost mega-thaw slump in the Yana Highlands |
title_full_unstemmed |
Palaeoclimate characteristics in interior Siberia of MIS 6–2: first insights from the Batagay permafrost mega-thaw slump in the Yana Highlands |
title_sort |
palaeoclimate characteristics in interior siberia of mis 6–2: first insights from the batagay permafrost mega-thaw slump in the yana highlands |
publisher |
Copernicus Publications |
publishDate |
2017 |
url |
https://doi.org/10.5194/cp-13-795-2017 https://www.clim-past.net/13/795/2017/cp-13-795-2017.pdf https://doaj.org/article/b3aaae908d75434182eb9669e90abf2e |
long_lat |
ENVELOPE(133.400,133.400,67.544,67.544) |
geographic |
Sakha Verkhoyansk |
geographic_facet |
Sakha Verkhoyansk |
genre |
Ice permafrost Sakha Sakha Republic Thermokarst wedge* Yakutia Siberia |
genre_facet |
Ice permafrost Sakha Sakha Republic Thermokarst wedge* Yakutia Siberia |
op_source |
Climate of the Past, Vol 13, Pp 795-818 (2017) |
op_relation |
doi:10.5194/cp-13-795-2017 1814-9324 1814-9332 https://www.clim-past.net/13/795/2017/cp-13-795-2017.pdf https://doaj.org/article/b3aaae908d75434182eb9669e90abf2e |
op_rights |
undefined |
op_doi |
https://doi.org/10.5194/cp-13-795-2017 |
container_title |
Climate of the Past |
container_volume |
13 |
container_issue |
7 |
container_start_page |
795 |
op_container_end_page |
818 |
_version_ |
1766027124356939776 |