Jonathan R. Dean
Eastern Mediterranean hydroclimate over the late glacial and Holocene, reconstructed from the sediments of Nar lake, central Turkey, using stable isotopes and carbonate mineralogy
Dean, Jonathan R.; Jones, Matthew D.; Leng, Melanie J.; Noble, Stephen R.; Metcalfe, Sarah E.; Sloane, Hilary J.; Sahy, Diana; Eastwood, Warren J.; Roberts, C. Neil
Authors
Professor MATTHEW JONES MATTHEW.JONES@NOTTINGHAM.AC.UK
PROFESSOR OF QUATERNARY SCIENCE
Professor MELANIE LENG Melanie.Leng@nottingham.ac.uk
PROFESSOR OF ISOTOPE GEOSCIENCES
Stephen R. Noble
Professor SARAH METCALFE SARAH.METCALFE@NOTTINGHAM.AC.UK
Deputy Pro-Vice-Chancellor Research Andknowledge Exchange
Hilary J. Sloane
Diana Sahy
Warren J. Eastwood
C. Neil Roberts
Abstract
There is a lack of high-resolution records of hydroclimate variability in the Eastern Mediterranean from the late glacial and early Holocene. More knowledge of the speed of climate shifts and the degree to which they were synchronous with changes in the North Atlantic or elsewhere is required to understand better the controls on Eastern Mediterranean climate. Using endogenic carbonate from a sediment sequence from Nar Gölü, a maar lake in central Turkey, dated by varve counting and uranium-thorium methods, we present high-resolution (∼25 years) oxygen (δ18O) and carbon isotope records, supported by carbonate mineralogy data, spanning the late glacial and Holocene. δ18Ocarbonate at Nar Gölü has been shown previously to be a strong proxy for regional water balance. After a dry period (i.e. evaporation far exceeding precipitation) in the Younger Dryas, the data show a transition into the relatively wetter early Holocene. In the early Holocene there are two drier periods that appear to peak at ∼9.3 ka and ∼8.2 ka, coincident with cooling ‘events’ seen in North Atlantic records. After this, and as seen in other records from the Eastern Mediterranean, there is a millennial-scale drying trend through the Mid Holocene Transition. The relatively dry late Holocene is punctuated by centennial-scale drought intervals, at the times of 4.2 ka ‘event’ and Late Bronze Age societal ‘collapse’. Overall, we show that central Turkey is drier when the North Atlantic is cooler, throughout this record and at multiple timescales, thought to be due to a weakening of the westerly storm track resulting from reduced cyclogenesis in the North Atlantic. However, some features, such as the Mid Holocene Transition and the fact the early Holocene dry episodes at Nar Gölü are of a longer duration than the more discrete ‘events’ seen in North Atlantic records, imply there are additional controls on Eastern Mediterranean hydroclimate.
Citation
Dean, J. R., Jones, M. D., Leng, M. J., Noble, S. R., Metcalfe, S. E., Sloane, H. J., Sahy, D., Eastwood, W. J., & Roberts, C. N. (2015). Eastern Mediterranean hydroclimate over the late glacial and Holocene, reconstructed from the sediments of Nar lake, central Turkey, using stable isotopes and carbonate mineralogy. Quaternary Science Reviews, 124, 162-174. https://doi.org/10.1016/j.quascirev.2015.07.023
Journal Article Type | Article |
---|---|
Acceptance Date | Jul 20, 2015 |
Online Publication Date | Jul 28, 2015 |
Publication Date | Sep 15, 2015 |
Deposit Date | Feb 11, 2016 |
Publicly Available Date | Feb 11, 2016 |
Journal | Quaternary Science Reviews |
Print ISSN | 0277-3791 |
Electronic ISSN | 1873-457X |
Publisher | Elsevier |
Peer Reviewed | Peer Reviewed |
Volume | 124 |
Pages | 162-174 |
DOI | https://doi.org/10.1016/j.quascirev.2015.07.023 |
Keywords | Oxygen and Carbon Isotopes, Eastern Mediterranean, Lake Sediment, Holocene, Late Glacial, Mid Holocene Transition, 9.3 Ka Event, 8.2 Ka Event, 4.2 Ka Event, Late Bronze Age |
Public URL | https://nottingham-repository.worktribe.com/output/761164 |
Publisher URL | http://www.sciencedirect.com/science/article/pii/S0277379115300615 |
Contract Date | Feb 11, 2016 |
Files
Dean et al. 2015 QSR.pdf
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Copyright Statement
Copyright information regarding this work can be found at the following address: http://creativecommons.org/licenses/by-nc-nd/4.0
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