Ice Complex formation on Bol'shoy Lyakhovsky Island (New Siberian Archipelago, East Siberian Arctic) since about 200 ka
Copyright © 2019 University of Washington. Published by Cambridge University Press. Late Quaternary landscapes of unglaciated Beringia were largely shaped by ice-wedge polygon tundra. Ice Complex (IC) strata preserve such ancient polygon formations. Here we report on the Yukagir IC from Bol'sho...
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ftneicon:oai:rour.neicon.ru:rour/198867 2023-05-15T15:09:55+02:00 Ice Complex formation on Bol'shoy Lyakhovsky Island (New Siberian Archipelago, East Siberian Arctic) since about 200 ka Wetterich S. Rudaya N. Kuznetsov V. Maksimov F. Opel T. Meyer H. Günther F. Bobrov A. Raschke E. Zimmermann H. Strauss J. Starikova A. Fuchs M. Schirrmeister L. 2019 https://openrepository.ru/article?id=198867 unknown Quaternary Research (United States) 2 92 530 http://rour.neicon.ru:80/xmlui/bitstream/rour/198867/1/nora.pdf 0033-5894 https://openrepository.ru/article?id=198867 SCOPUS00335894-2019-92-2-SID85072669866 Beringia Cryostratigraphy Ice wedges Pollen Radioisotope disequilibria dating Stable isotopes Article 2019 ftneicon 2020-07-21T12:06:04Z Copyright © 2019 University of Washington. Published by Cambridge University Press. Late Quaternary landscapes of unglaciated Beringia were largely shaped by ice-wedge polygon tundra. Ice Complex (IC) strata preserve such ancient polygon formations. Here we report on the Yukagir IC from Bol'shoy Lyakhovsky Island in northeastern Siberia and suggest that new radioisotope disequilibria (230Th/U) dates of the Yukagir IC peat confirm its formation during the Marine Oxygen Isotope Stage (MIS) 7a-c interglacial period. The preservation of the ice-rich Yukagir IC proves its resilience to last interglacial and late glacial-Holocene warming. This study compares the Yukagir IC to IC strata of MIS 5, MIS 3, and MIS 2 ages exposed on Bol'shoy Lyakhovsky Island. Besides high intrasedimental ice content and syngenetic ice wedges intersecting silts, sandy silts, the Yukagir IC is characterized by high organic matter (OM) accumulation and low OM decomposition of a distinctive Drepanocladus moss-peat. The Yukagir IC pollen data reveal grass-shrub-moss tundra indicating rather wet summer conditions similar to modern ones. The stable isotope composition of Yukagir IC wedge ice is similar to those of the MIS 5 and MIS 3 ICs pointing to similar atmospheric moisture generation and transport patterns in winter. IC data from glacial and interglacial periods provide insights into permafrost and climate dynamics since about 200 ka. Article in Journal/Newspaper Arctic Ice permafrost Tundra wedge* Beringia Siberia NORA (National aggregator of open repositories of Russian universities) Arctic Yukagir ENVELOPE(139.848,139.848,71.776,71.776) |
institution |
Open Polar |
collection |
NORA (National aggregator of open repositories of Russian universities) |
op_collection_id |
ftneicon |
language |
unknown |
topic |
Beringia Cryostratigraphy Ice wedges Pollen Radioisotope disequilibria dating Stable isotopes |
spellingShingle |
Beringia Cryostratigraphy Ice wedges Pollen Radioisotope disequilibria dating Stable isotopes Wetterich S. Rudaya N. Kuznetsov V. Maksimov F. Opel T. Meyer H. Günther F. Bobrov A. Raschke E. Zimmermann H. Strauss J. Starikova A. Fuchs M. Schirrmeister L. Ice Complex formation on Bol'shoy Lyakhovsky Island (New Siberian Archipelago, East Siberian Arctic) since about 200 ka |
topic_facet |
Beringia Cryostratigraphy Ice wedges Pollen Radioisotope disequilibria dating Stable isotopes |
description |
Copyright © 2019 University of Washington. Published by Cambridge University Press. Late Quaternary landscapes of unglaciated Beringia were largely shaped by ice-wedge polygon tundra. Ice Complex (IC) strata preserve such ancient polygon formations. Here we report on the Yukagir IC from Bol'shoy Lyakhovsky Island in northeastern Siberia and suggest that new radioisotope disequilibria (230Th/U) dates of the Yukagir IC peat confirm its formation during the Marine Oxygen Isotope Stage (MIS) 7a-c interglacial period. The preservation of the ice-rich Yukagir IC proves its resilience to last interglacial and late glacial-Holocene warming. This study compares the Yukagir IC to IC strata of MIS 5, MIS 3, and MIS 2 ages exposed on Bol'shoy Lyakhovsky Island. Besides high intrasedimental ice content and syngenetic ice wedges intersecting silts, sandy silts, the Yukagir IC is characterized by high organic matter (OM) accumulation and low OM decomposition of a distinctive Drepanocladus moss-peat. The Yukagir IC pollen data reveal grass-shrub-moss tundra indicating rather wet summer conditions similar to modern ones. The stable isotope composition of Yukagir IC wedge ice is similar to those of the MIS 5 and MIS 3 ICs pointing to similar atmospheric moisture generation and transport patterns in winter. IC data from glacial and interglacial periods provide insights into permafrost and climate dynamics since about 200 ka. |
format |
Article in Journal/Newspaper |
author |
Wetterich S. Rudaya N. Kuznetsov V. Maksimov F. Opel T. Meyer H. Günther F. Bobrov A. Raschke E. Zimmermann H. Strauss J. Starikova A. Fuchs M. Schirrmeister L. |
author_facet |
Wetterich S. Rudaya N. Kuznetsov V. Maksimov F. Opel T. Meyer H. Günther F. Bobrov A. Raschke E. Zimmermann H. Strauss J. Starikova A. Fuchs M. Schirrmeister L. |
author_sort |
Wetterich S. |
title |
Ice Complex formation on Bol'shoy Lyakhovsky Island (New Siberian Archipelago, East Siberian Arctic) since about 200 ka |
title_short |
Ice Complex formation on Bol'shoy Lyakhovsky Island (New Siberian Archipelago, East Siberian Arctic) since about 200 ka |
title_full |
Ice Complex formation on Bol'shoy Lyakhovsky Island (New Siberian Archipelago, East Siberian Arctic) since about 200 ka |
title_fullStr |
Ice Complex formation on Bol'shoy Lyakhovsky Island (New Siberian Archipelago, East Siberian Arctic) since about 200 ka |
title_full_unstemmed |
Ice Complex formation on Bol'shoy Lyakhovsky Island (New Siberian Archipelago, East Siberian Arctic) since about 200 ka |
title_sort |
ice complex formation on bol'shoy lyakhovsky island (new siberian archipelago, east siberian arctic) since about 200 ka |
publishDate |
2019 |
url |
https://openrepository.ru/article?id=198867 |
long_lat |
ENVELOPE(139.848,139.848,71.776,71.776) |
geographic |
Arctic Yukagir |
geographic_facet |
Arctic Yukagir |
genre |
Arctic Ice permafrost Tundra wedge* Beringia Siberia |
genre_facet |
Arctic Ice permafrost Tundra wedge* Beringia Siberia |
op_source |
SCOPUS00335894-2019-92-2-SID85072669866 |
op_relation |
Quaternary Research (United States) 2 92 530 http://rour.neicon.ru:80/xmlui/bitstream/rour/198867/1/nora.pdf 0033-5894 https://openrepository.ru/article?id=198867 |
_version_ |
1766341020585295872 |