(super 14) C dating of peat and delta (super 18) O-delta D 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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Radiocarbon
2001
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ftunivarizonaojs:oai:journals.uair.arizona.edu:article/3884 2023-05-15T17:14:38+02:00 (super 14) C dating of peat and delta (super 18) O-delta D in ground ice from Northwest Siberia. Vasil, chuk K Jungner, Hoegne Vasil, chuk C 2001-01-01 application/pdf https://journals.uair.arizona.edu/index.php/radiocarbon/article/view/3884 eng eng Radiocarbon https://journals.uair.arizona.edu/index.php/radiocarbon/article/view/3884/3309 https://journals.uair.arizona.edu/index.php/radiocarbon/article/view/3884 Radiocarbon; Vol 43, No 2B (2001); 527-540 0033-8222 tundra;D H;Tyumen Russian Federation;Yamal;Yamal Nenets Russian Federation;frozen ground;northwestern Siberia;thawing;ground ice;ice;deuterium;O 18 O 16;hydrogen;oxygen;isotope ratios;Holocene;Russian Federation;Siberia;peat;Commonwealth of Independent States;sediments;Asia;Cenozoic;Quaternary;C 14;carbon;dates;isotopes;radioactive isotopes;stable isotopes;absolute age info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article 2001 ftunivarizonaojs 2020-11-14T16:10:19Z 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. (super 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 (delta (super 18) O = -19.1 to -20.3 per mil in the Seyaha cross-section and -17.3 to -20.3 per mil 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 nenets Tundra Yamal Peninsula Siberia Journals at the University of Arizona Labytnangi ENVELOPE(66.418,66.418,66.657,66.657) Yamal Peninsula ENVELOPE(69.873,69.873,70.816,70.816) |
institution |
Open Polar |
collection |
Journals at the University of Arizona |
op_collection_id |
ftunivarizonaojs |
language |
English |
topic |
tundra;D H;Tyumen Russian Federation;Yamal;Yamal Nenets Russian Federation;frozen ground;northwestern Siberia;thawing;ground ice;ice;deuterium;O 18 O 16;hydrogen;oxygen;isotope ratios;Holocene;Russian Federation;Siberia;peat;Commonwealth of Independent States;sediments;Asia;Cenozoic;Quaternary;C 14;carbon;dates;isotopes;radioactive isotopes;stable isotopes;absolute age |
spellingShingle |
tundra;D H;Tyumen Russian Federation;Yamal;Yamal Nenets Russian Federation;frozen ground;northwestern Siberia;thawing;ground ice;ice;deuterium;O 18 O 16;hydrogen;oxygen;isotope ratios;Holocene;Russian Federation;Siberia;peat;Commonwealth of Independent States;sediments;Asia;Cenozoic;Quaternary;C 14;carbon;dates;isotopes;radioactive isotopes;stable isotopes;absolute age Vasil, chuk K Jungner, Hoegne Vasil, chuk C (super 14) C dating of peat and delta (super 18) O-delta D in ground ice from Northwest Siberia. |
topic_facet |
tundra;D H;Tyumen Russian Federation;Yamal;Yamal Nenets Russian Federation;frozen ground;northwestern Siberia;thawing;ground ice;ice;deuterium;O 18 O 16;hydrogen;oxygen;isotope ratios;Holocene;Russian Federation;Siberia;peat;Commonwealth of Independent States;sediments;Asia;Cenozoic;Quaternary;C 14;carbon;dates;isotopes;radioactive isotopes;stable isotopes;absolute age |
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. (super 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 (delta (super 18) O = -19.1 to -20.3 per mil in the Seyaha cross-section and -17.3 to -20.3 per mil 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 K Jungner, Hoegne Vasil, chuk C |
author_facet |
Vasil, chuk K Jungner, Hoegne Vasil, chuk C |
author_sort |
Vasil, chuk K |
title |
(super 14) C dating of peat and delta (super 18) O-delta D in ground ice from Northwest Siberia. |
title_short |
(super 14) C dating of peat and delta (super 18) O-delta D in ground ice from Northwest Siberia. |
title_full |
(super 14) C dating of peat and delta (super 18) O-delta D in ground ice from Northwest Siberia. |
title_fullStr |
(super 14) C dating of peat and delta (super 18) O-delta D in ground ice from Northwest Siberia. |
title_full_unstemmed |
(super 14) C dating of peat and delta (super 18) O-delta D in ground ice from Northwest Siberia. |
title_sort |
(super 14) c dating of peat and delta (super 18) o-delta d in ground ice from northwest siberia. |
publisher |
Radiocarbon |
publishDate |
2001 |
url |
https://journals.uair.arizona.edu/index.php/radiocarbon/article/view/3884 |
long_lat |
ENVELOPE(66.418,66.418,66.657,66.657) ENVELOPE(69.873,69.873,70.816,70.816) |
geographic |
Labytnangi Yamal Peninsula |
geographic_facet |
Labytnangi Yamal Peninsula |
genre |
nenets Tundra Yamal Peninsula Siberia |
genre_facet |
nenets Tundra Yamal Peninsula Siberia |
op_source |
Radiocarbon; Vol 43, No 2B (2001); 527-540 0033-8222 |
op_relation |
https://journals.uair.arizona.edu/index.php/radiocarbon/article/view/3884/3309 https://journals.uair.arizona.edu/index.php/radiocarbon/article/view/3884 |
_version_ |
1766072035478339584 |