Ice Complex formation on Bol'shoy Lyakhovsky Island (New Siberian Archipelago, East Siberian Arctic) since about 200 ka
Abstract 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 radioisoto...
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Online Access: | http://dx.doi.org/10.1017/qua.2019.6 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0033589419000061 |
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crcambridgeupr:10.1017/qua.2019.6 2024-05-19T07:36:21+00:00 Ice Complex formation on Bol'shoy Lyakhovsky Island (New Siberian Archipelago, East Siberian Arctic) since about 200 ka Wetterich, Sebastian Rudaya, Natalia Kuznetsov, Vladislav Maksimov, Fedor Opel, Thomas Meyer, Hanno Günther, Frank Bobrov, Anatoly Raschke, Elena Zimmermann, Heike H. Strauss, Jens Starikova, Anna Fuchs, Margret Schirrmeister, Lutz 2019 http://dx.doi.org/10.1017/qua.2019.6 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0033589419000061 en eng Cambridge University Press (CUP) https://www.cambridge.org/core/terms Quaternary Research volume 92, issue 2, page 530-548 ISSN 0033-5894 1096-0287 journal-article 2019 crcambridgeupr https://doi.org/10.1017/qua.2019.6 2024-05-02T06:50:42Z Abstract 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 ( 230 Th/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 Cambridge University Press Quaternary Research 92 2 530 548 |
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Cambridge University Press |
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crcambridgeupr |
language |
English |
description |
Abstract 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 ( 230 Th/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, Sebastian Rudaya, Natalia Kuznetsov, Vladislav Maksimov, Fedor Opel, Thomas Meyer, Hanno Günther, Frank Bobrov, Anatoly Raschke, Elena Zimmermann, Heike H. Strauss, Jens Starikova, Anna Fuchs, Margret Schirrmeister, Lutz |
spellingShingle |
Wetterich, Sebastian Rudaya, Natalia Kuznetsov, Vladislav Maksimov, Fedor Opel, Thomas Meyer, Hanno Günther, Frank Bobrov, Anatoly Raschke, Elena Zimmermann, Heike H. Strauss, Jens Starikova, Anna Fuchs, Margret Schirrmeister, Lutz Ice Complex formation on Bol'shoy Lyakhovsky Island (New Siberian Archipelago, East Siberian Arctic) since about 200 ka |
author_facet |
Wetterich, Sebastian Rudaya, Natalia Kuznetsov, Vladislav Maksimov, Fedor Opel, Thomas Meyer, Hanno Günther, Frank Bobrov, Anatoly Raschke, Elena Zimmermann, Heike H. Strauss, Jens Starikova, Anna Fuchs, Margret Schirrmeister, Lutz |
author_sort |
Wetterich, Sebastian |
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 |
publisher |
Cambridge University Press (CUP) |
publishDate |
2019 |
url |
http://dx.doi.org/10.1017/qua.2019.6 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0033589419000061 |
genre |
Arctic Ice permafrost Tundra wedge* Beringia Siberia |
genre_facet |
Arctic Ice permafrost Tundra wedge* Beringia Siberia |
op_source |
Quaternary Research volume 92, issue 2, page 530-548 ISSN 0033-5894 1096-0287 |
op_rights |
https://www.cambridge.org/core/terms |
op_doi |
https://doi.org/10.1017/qua.2019.6 |
container_title |
Quaternary Research |
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92 |
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2 |
container_start_page |
530 |
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548 |
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1799475458278948864 |