Vasil'chuk, Yurij K; Vasil'chuk, Alla Constantinovna (2021): Mean January air temperatures in Siberian permafrost at 20−18 ka BP and comparison with modern values [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.933669
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Abstract:
Palaeotemperature reconstruction for the period of 20−18 ka BP in Siberia is based on δ¹⁸O analysis and ¹⁴C dating of large syngenetic ice wedges of yedoma exposures from Yamal Peninsula to Chukotka. The modern relationship between δ¹⁸O composition of ice-wedge ice and winter temperature reveals Palaeotemperature reconstruction. Snow meltwater is considered to be the main source of ice-wedge ice. In modern ice wedges during the last 60–100 years δ¹⁸O fluctuates are between −14 and −20‰ in western Siberia and between −23 and −28‰ in northern Yakutia. The trend in δ¹⁸O distribution in ice wedges dated at 20−18 ka BP is similar to the modern one. δ¹⁸O values in Late Pleistocene wedges are more negative going from the west to the east: from −19 to −25‰ in western Siberian ice wedges to −30 to −35‰ in northern Yakutia. At 20−18 ka BP mean January temperatures were about 8–12°C lower (in Chukotka up to 17–18°C) than at present.
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Related to:
Vasil'chuk, Yurij K; Vasil'chuk, Alla Constantinovna (2014): Spatial distribution of mean winter air temperatures in Siberian permafrost at 20−18 ka BP using oxygen isotope data. Boreas, 43(3), 678-687, https://doi.org/10.1111/bor.12033
Source:
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Funding:
Russian Science Foundation, grant/award no. 19-17-00126: Verification and validation of Late Pleistocene paleotemperature scenario based on the stable isotope data in syngenetic ice wedges in Siberia using independent paleoclimatic models
Coverage:
Median Latitude: 69.440074 * Median Longitude: 133.724552 * South-bound Latitude: 62.250000 * West-bound Longitude: 72.566667 * North-bound Latitude: 75.255300 * East-bound Longitude: 171.258900
Event(s):
Comment:
Mean January air temperaures of the Siberian permafrost were compiled from Vasil'chuk 1992 with additions and amendments).
Data were 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.
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Event label | Event | Vasil'chuk, Yurij K | |||
| 2 | Location | Location | Vasil'chuk, Yurij K | |||
| 3 | δ18O | δ18O | ‰ | Vasil'chuk, Yurij K | ice wedge | |
| 4 | Temperature, air, January | T air (1) | °C | Vasil'chuk, Yurij K | mean | |
| 5 | Temperature, air, monthly minimum | TTT month min | °C | Vasil'chuk, Yurij K | January | |
| 6 | Temperature, air, monthly maximum | TTT month max | °C | Vasil'chuk, Yurij K | January | |
| 7 | Age, dated | Age dated | ka | Vasil'chuk, Yurij K | min | |
| 8 | Age, dated | Age dated | ka | Vasil'chuk, Yurij K | max | |
| 9 | Sample comment | Sample comment | Vasil'chuk, Yurij K | Age dated | ||
| 10 | Reference/source | Reference | Vasil'chuk, Yurij K |
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0)
Status:
Curation Level: Enhanced curation (CurationLevelC)
Size:
253 data points