14 C Dating of Peat and δ 18 O-δd in Ground Ice From Northwest Siberia
We present new radiocarbon dates from a number of Holocene peat deposits along a north-south transect across the Yamal Peninsula. The samples were collected from frozen peat deposits with large ice wedges in: the northern tundra near Seyaha Settlement, in the Central Yamal Peninsula, the southern tu...
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Cambridge University Press (CUP)
2001
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Online Access: | http://dx.doi.org/10.1017/s0033822200041187 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0033822200041187 |
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crcambridgeupr:10.1017/s0033822200041187 2024-03-03T08:49:13+00:00 14 C Dating of Peat and δ 18 O-δd in Ground Ice From Northwest Siberia Vasil'chuk, Yurij K Jungner, Högne Vasil'chuk, Alla C 2001 http://dx.doi.org/10.1017/s0033822200041187 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0033822200041187 en eng Cambridge University Press (CUP) https://www.cambridge.org/core/terms Radiocarbon volume 43, issue 2B, page 527-540 ISSN 0033-8222 1945-5755 General Earth and Planetary Sciences Archeology journal-article 2001 crcambridgeupr https://doi.org/10.1017/s0033822200041187 2024-02-08T08:43:01Z We present new radiocarbon dates from a number of Holocene peat deposits along a north-south transect across the Yamal Peninsula. The samples were collected from frozen peat deposits with large ice wedges in: the northern tundra near Seyaha Settlement, in the Central Yamal Peninsula, the southern tundra in Shchuch'ya River valley at the Edem'yaha mouth, the southern part of the Yamal Peninsula, and the southern forest tundra near Labytnangi Town. 14 C dates of wood remains from the tundra in the Yamal Peninsula could be used to reconstruct a northern limit of forest during the Holocene Optimum. The wood layers at the bottom of the peat give evidence for immigration of trees further north beyond the present boundary. The first forest appearance in the Seyaha River valley area is dated about 9 ka BP according to the oldest peat date in the Seyaha cross section. This suggests that summer temperatures were higher than at present. Very fast accumulation of peat (around 5 m/ka: about 9–8 ka BP at Seyaha and about 7–6 ka BP at Shchuch'ya) also supports this observation. In contrast, oxygen isotope composition of Holocene syngenetic ice wedges from the area (δ 18 O= −19.1 to −20.3‰ in the Seyaha cross-section and −17.3 to −20.3‰ in the Shchuch'ya River) show that winter temperatures were significantly lower than presently, i.e. the climate during the Holocene Optimum was slightly more continental. The frozen peat near Labytnangi has thawed during the last 20 years, indicating global warming. Article in Journal/Newspaper Tundra Yamal Peninsula Siberia Cambridge University Press Yamal Peninsula ENVELOPE(69.873,69.873,70.816,70.816) Labytnangi ENVELOPE(66.418,66.418,66.657,66.657) Radiocarbon 43 2B 527 540 |
institution |
Open Polar |
collection |
Cambridge University Press |
op_collection_id |
crcambridgeupr |
language |
English |
topic |
General Earth and Planetary Sciences Archeology |
spellingShingle |
General Earth and Planetary Sciences Archeology Vasil'chuk, Yurij K Jungner, Högne Vasil'chuk, Alla C 14 C Dating of Peat and δ 18 O-δd in Ground Ice From Northwest Siberia |
topic_facet |
General Earth and Planetary Sciences Archeology |
description |
We present new radiocarbon dates from a number of Holocene peat deposits along a north-south transect across the Yamal Peninsula. The samples were collected from frozen peat deposits with large ice wedges in: the northern tundra near Seyaha Settlement, in the Central Yamal Peninsula, the southern tundra in Shchuch'ya River valley at the Edem'yaha mouth, the southern part of the Yamal Peninsula, and the southern forest tundra near Labytnangi Town. 14 C dates of wood remains from the tundra in the Yamal Peninsula could be used to reconstruct a northern limit of forest during the Holocene Optimum. The wood layers at the bottom of the peat give evidence for immigration of trees further north beyond the present boundary. The first forest appearance in the Seyaha River valley area is dated about 9 ka BP according to the oldest peat date in the Seyaha cross section. This suggests that summer temperatures were higher than at present. Very fast accumulation of peat (around 5 m/ka: about 9–8 ka BP at Seyaha and about 7–6 ka BP at Shchuch'ya) also supports this observation. In contrast, oxygen isotope composition of Holocene syngenetic ice wedges from the area (δ 18 O= −19.1 to −20.3‰ in the Seyaha cross-section and −17.3 to −20.3‰ in the Shchuch'ya River) show that winter temperatures were significantly lower than presently, i.e. the climate during the Holocene Optimum was slightly more continental. The frozen peat near Labytnangi has thawed during the last 20 years, indicating global warming. |
format |
Article in Journal/Newspaper |
author |
Vasil'chuk, Yurij K Jungner, Högne Vasil'chuk, Alla C |
author_facet |
Vasil'chuk, Yurij K Jungner, Högne Vasil'chuk, Alla C |
author_sort |
Vasil'chuk, Yurij K |
title |
14 C Dating of Peat and δ 18 O-δd in Ground Ice From Northwest Siberia |
title_short |
14 C Dating of Peat and δ 18 O-δd in Ground Ice From Northwest Siberia |
title_full |
14 C Dating of Peat and δ 18 O-δd in Ground Ice From Northwest Siberia |
title_fullStr |
14 C Dating of Peat and δ 18 O-δd in Ground Ice From Northwest Siberia |
title_full_unstemmed |
14 C Dating of Peat and δ 18 O-δd in Ground Ice From Northwest Siberia |
title_sort |
14 c dating of peat and δ 18 o-δd in ground ice from northwest siberia |
publisher |
Cambridge University Press (CUP) |
publishDate |
2001 |
url |
http://dx.doi.org/10.1017/s0033822200041187 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0033822200041187 |
long_lat |
ENVELOPE(69.873,69.873,70.816,70.816) ENVELOPE(66.418,66.418,66.657,66.657) |
geographic |
Yamal Peninsula Labytnangi |
geographic_facet |
Yamal Peninsula Labytnangi |
genre |
Tundra Yamal Peninsula Siberia |
genre_facet |
Tundra Yamal Peninsula Siberia |
op_source |
Radiocarbon volume 43, issue 2B, page 527-540 ISSN 0033-8222 1945-5755 |
op_rights |
https://www.cambridge.org/core/terms |
op_doi |
https://doi.org/10.1017/s0033822200041187 |
container_title |
Radiocarbon |
container_volume |
43 |
container_issue |
2B |
container_start_page |
527 |
op_container_end_page |
540 |
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1792506396936241152 |