Vasil'chuk, Yurij K; Jungner, Höegne; Vasil'chuk, Alla Constantinovna (2020): ¹⁴C Dating of Peat and δ¹⁸O-δD in Ground Ice From Northwest Siberia [dataset bundled publication]. PANGAEA, https://doi.org/10.1594/PANGAEA.919177
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Abstract:
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. ¹⁴C 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 (δ¹⁸O= −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.
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Supplement to:
Vasil'chuk, Yurij K; Jungner, Höegne; Vasil'chuk, Alla Constantinovna (2001): ¹⁴C Dating of Peat and δ¹⁸O-δD in Ground Ice From Northwest Siberia. Radiocarbon, 43(2B), 527-540, https://doi.org/10.1017/S0033822200041187
Further details:
Hantemirov, Rashit; Shiyatov, S G (1999): Radiocarbon and dendrochronological dates of subfossil wood from Yamal Peninsula and usage of those in studies of forest-tundra ecosystems dynamics. In Biota of Pre-Urals Subarctic in Late Pleistocene and Holocene. Ekaterinburg. P.3-22. [In Russian]
Vasil'chuk, Yurij K (1992): Oxygen Isotope Composition of Ground Ice (Application to Paleogeocryological Reconstructions) [in Russian]. Theor. Probl. Dept., RAS, Moscow University, Research Institute of Engineering for Construction (PNIIIS), Moscow (Volume 1, 420 pp., Volume 2, 264 pp.)
Vasil'chuk, Yurij K; Vasil'chuk, Alla Constantinovna (1995): Ice-wedge formation in northern Asia during the Holocene. Permafrost and Periglacial Processes, 6(3), 273-279, https://doi.org/10.1002/ppp.3430060309
Coverage:
Median Latitude: 68.401544 * Median Longitude: 69.215420 * South-bound Latitude: 66.658056 * West-bound Longitude: 66.300556 * North-bound Latitude: 70.369725 * East-bound Longitude: 72.508333
Date/Time Start: 1996-08-01T00:00:00 * Date/Time End: 1997-07-31T00:00:00
Comment:
Data was submitted and proofread by Yurij K Vasil'chuk and Lyubov Bludushkina at the faculty of Geography, department of Geochemistry of Landscapes and Geography of Soils, Lomonosov Moscow State University.
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0)
Size:
6 datasets
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Datasets listed in this bundled publication
- Vasil'chuk, YK; Jungner, H; Vasil'chuk, AC (2020): ¹⁴C dates of organic material in the thick peat near Seyaha settlement (Yamal Penninsula, Siberia). https://doi.org/10.1594/PANGAEA.919169
- Vasil'chuk, YK; Jungner, H; Vasil'chuk, AC (2020): ¹⁴C dates of organic material in the thick peat of the Shchuch'ya River valley (Yamal-Nenets, Siberia). https://doi.org/10.1594/PANGAEA.919171
- Vasil'chuk, YK; Jungner, H; Vasil'chuk, AC (2020): ¹⁴C dates of organic material in the peat near Labytnangi town (Yamal-Nenets, Siberia). https://doi.org/10.1594/PANGAEA.919172
- Vasil'chuk, YK; Jungner, H; Vasil'chuk, AC (2020): δ¹⁸O and δD composition of syngenetic ice-wedges in the thick peat near Seyaha settlement (Yamal Peninsula, Siberia). https://doi.org/10.1594/PANGAEA.919173
- Vasil'chuk, YK; Jungner, H; Vasil'chuk, AC (2020): δ¹⁸O and δD composition of syngenetic ice-wedges in the thick peat of the Shchuch'ya River valley (Yamal-Nenets, Siberia). https://doi.org/10.1594/PANGAEA.919175
- Vasil'chuk, YK; Jungner, H; Vasil'chuk, AC (2020): ¹⁴C dates for wood samples from the Yamal Peninsula. https://doi.org/10.1594/PANGAEA.919176