Journal
QUATERNARY
Volume 2, Issue 3, Pages -Publisher
MDPI
DOI: 10.3390/quat2030031
Keywords
speleothems; carbon and oxygen stable isotopes; paleohydroclimate
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Funding
- Hungarian Academy of Sciences (MTA Lendulet program) [LP2012-27/2012]
- Janos Bolyai Research Scholarship of the Hungarian Academy of Sciences
- UEFISCDI Romania [PN-III-P1-1.1-TE-2016-2210]
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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 similar to 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 similar to 90 kyr for both delta C-13 and delta O-18, with a mean temporal resolution of similar to 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 delta O-18 (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 delta O-18, temperature and large-scale circulation (North Atlantic Oscillation) expected to be preserved in the speleothem delta O-18 record; while a negative relationship was documented between precipitation amount and oxygen isotope compositions in South East Europe. Variations of delta C-13 values are primarily interpreted as reflecting dry/wet periods across the region. Elevation gradients from three non-overlapping periods of the last similar to 5 kyr indicated elevation gradients around -0.26 parts per thousand per 100 m(-1) for calcite delta O-18.
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