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Speleothem Records from the Eastern Part of Europe and Turkey—Discussion on Stable Oxygen and Carbon Isotopes

1
Institute for Geological and Geochemical Research, Research Centre for Astronomy and Earth Sciences, Hungarian Academy of Sciences, H-1112 Budapest, Hungary
2
Emil Racoviță Institute of Speleology, Romanian Academy, Clinicilor 5, 400006 Cluj Napoca, Romania
3
Stable Isotope Laboratory, University of Suceava, Universității 13, 720229 Suceava, Romania
*
Author to whom correspondence should be addressed.
Quaternary 2019, 2(3), 31; https://doi.org/10.3390/quat2030031
Received: 30 November 2018 / Revised: 3 September 2019 / Accepted: 6 September 2019 / Published: 18 September 2019
(This article belongs to the Special Issue Speleothem Records and Climate)
The region comprising of East Central Europe, South East Europe and Turkey contributed to the SISAL (Speleothem Isotopes Synthesis and AnaLysis) global database with stable carbon and oxygen isotope time-series from 18 speleothems from 14 caves. The currently available oldest record from the studied region is the ABA-2 flowstone record (Abaliget Cave; Hungary) reaching back to MIS 6. The temporal distribution of the compiled 18 records from the region points out a ~20 kyr-long period, centering around 100 ka BP, lacking speleothem stable isotope data. The regional subset of SISAL_v1 records displays a continuous coverage for the past ~90 kyr for both δ13C and δ18O, with a mean temporal resolution of ~12 yr for the Holocene, and >50 yr for the pre-Holocene period. The highest temporal resolution both for the Holocene and the pre-Holocene was achieved in the So-1 record (Sofular Cave; Turkey). The relationship between modern day precipitation δ18O (amount weighted annual and winter season mean values; 1961–2017) and climatological parameters was evaluated. The strong positive correlation found in East Central Europe reinforces the link between modern day precipitation δ18O, temperature and large-scale circulation (North Atlantic Oscillation) expected to be preserved in the speleothem δ18O record; while a negative relationship was documented between precipitation amount and oxygen isotope compositions in South East Europe. Variations of δ13C values are primarily interpreted as reflecting dry/wet periods across the region. Elevation gradients from three non-overlapping periods of the last ~5 kyr indicated elevation gradients around −0.26‰ per 100 m−1 for calcite δ18O. View Full-Text
Keywords: speleothems; carbon and oxygen stable isotopes; paleohydroclimate speleothems; carbon and oxygen stable isotopes; paleohydroclimate
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Kern, Z.; Demény, A.; Perşoiu, A.; Hatvani, I.G. Speleothem Records from the Eastern Part of Europe and Turkey—Discussion on Stable Oxygen and Carbon Isotopes. Quaternary 2019, 2, 31.

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