Mean January air temperatures in Siberian permafrost at 20−18 ka BP and comparison with modern values

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.

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.

Identifier
DOI https://doi.org/10.1594/PANGAEA.933669
PID https://hdl.handle.net/10013/epic.29856.d001
Related Identifier https://doi.org/10.1111/bor.12033
Related Identifier https://doi.org/10.5194/tc-7-31-2013
Related Identifier https://hdl.handle.net/10013/epic.29857.d001
Related Identifier https://doi.org/10.1002/ppp.556
Related Identifier https://doi.org/10.1111/j.1751-8369.2008.00067.x
Related Identifier https://doi.org/10.1080/789610225
Metadata Access https://ws.pangaea.de/oai/provider?verb=GetRecord&metadataPrefix=datacite4&identifier=oai:pangaea.de:doi:10.1594/PANGAEA.933669
Provenance
Creator Vasil'chuk, Yurij K; Vasil'chuk, Alla Constantinovna
Publisher PANGAEA - Data Publisher for Earth & Environmental Science
Publication Year 2021
Funding Reference Russian Foundation for Basic Research, 18 05 60272; Russian Science Foundation, 19 17 00126
Rights Creative Commons Attribution 4.0 International; https://creativecommons.org/licenses/by/4.0/
OpenAccess true
Representation
Language English
Resource Type Dataset
Format text/tab-separated-values
Size 253 data points
Discipline Earth System Research
Spatial Coverage (72.567W, 62.250S, 171.259E, 75.255N); Sakha Republic, Russia; Chukotka, Russia; Krasnoyarsk, Russia; Yamal-Nenets, Russia; Kotelny Island, Siberian, Russia; North Yakutia, Russia; Labaz Lake; Yamal Peninsula, northwestern Siberia