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Opel, Thomas; Laepple, Thomas; Meyer, Hanno; Dereviagin, Alexander Yu; Wetterich, Sebastian (2017): (Table 1) Radiocarbon ages of organic remains in Oyogos Yar ice-wedge samples and corresponding δ¹⁸O values. PANGAEA, https://doi.org/10.1594/PANGAEA.873563, Supplement to: Opel, T et al. (2017): Northeast Siberian ice wedges confirm Arctic winter warming over the past two millennia. The Holocene, 8 pp, https://doi.org/10.1177/0959683617702229

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Abstract:
Arctic climate has experienced major changes over the past millennia that are not fully understood in terms of their controls and seasonality. Stable-data from ice wedges in permafrost provide unique information on past winter climate. Recently, an ice-wedge record from the Lena River Delta suggested for the first time that Siberian winter temperatures increased throughout the Holocene, contradicting most other Arctic paleoclimate reconstructions which are likely biased towards the summer. However, the representativeness of this single record and the spatial extent of its reconstructed winter warming signal is unclear. Here, we present a new winter temperature record based on paired stable oxygen (d18O) and radiocarbon age data spanning the last two millennia from the Oyogos Yar coast in northeast Siberia. The record confirms the long-term winter warming signal as well as the unprecedented temperature rise in recent decades. This confirmation demonstrates that winter warming over the last millennia is a coherent feature in the northeastern Siberian Arctic, supporting the hypothesis of an insolation-driven seasonal Holocene temperature evolution followed by a strong warming likely related to anthropogenic forcing.
Coverage:
Median Latitude: 72.682968 * Median Longitude: 143.484885 * South-bound Latitude: 72.681460 * West-bound Longitude: 143.475260 * North-bound Latitude: 72.683470 * East-bound Longitude: 143.513760
Date/Time Start: 2007-08-11T00:00:00 * Date/Time End: 2007-08-22T00:00:00
Event(s):
Oy7-04-IW2 * Latitude: 72.681460 * Longitude: 143.513760 * Date/Time: 2007-08-11T00:00:00 * Location: Oyogos Yar, East Siberia, Russia * Campaign: Lena2007 (RU-Land_2007_Lena) * Basis: AWI Arctic Land Expedition * Method/Device: Sampling by hand (HAND)
Oy7-11-IW1 * Latitude: 72.683470 * Longitude: 143.475260 * Date/Time: 2007-08-22T00:00:00 * Location: Oyogos Yar, East Siberia, Russia * Campaign: Lena2007 (RU-Land_2007_Lena) * Basis: AWI Arctic Land Expedition * Method/Device: Sampling by hand (HAND)
Oy7-11-IW7 * Latitude: 72.683470 * Longitude: 143.475260 * Date/Time: 2007-08-22T00:00:00 * Campaign: Lena2007 (RU-Land_2007_Lena) * Basis: AWI Arctic Land Expedition * Method/Device: Sampling by hand (HAND)
Parameter(s):
#NameShort NameUnitPrincipal InvestigatorMethod/DeviceComment
1Event labelEventOpel, Thomas
2Date/Time of eventDate/TimeOpel, Thomas
3Latitude of eventLatitudeOpel, Thomas
4Longitude of eventLongitudeOpel, Thomas
5Sample IDSample IDOpel, Thomas
6Sample, optional label/labor noLab noOpel, Thomas
7Age, datedAge datedkaOpel, ThomasAge, 14C AMSBP (1950)
8Age, dated standard deviationAge dated std dev±Opel, ThomasAge, 14C AMS
9Age, commentCommOpel, Thomas
10AgeAgea ADOpel, ThomasCalibrated age midpoint of highest posterior density (hpd)
11Age, errorAge e±Opel, ThomasRange of highest posterior density (hpd) in years
12ProbabilityProb%Opel, Thomas
13δ18O, waterδ18O H2O‰ SMOWOpel, Thomaswith respect to VSMOW
Size:
160 data points

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