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ToolsRowe, P. J., Mason, J. E., Andrews, J. E., Marca, A. D., Thomas, L., van Calsteren, P, Jex, C. N., Vonhof, H. B. and Al-Omari, S. (2012) Speleothem isotopic evidence of winter rainfall variability in northeast Turkey between 77 and 6 ka. Quaternary Science Reviews, 45. pp. 60-72. ISSN 1873-457X
Full text not available from this repository. (Request a copy)Abstract
An oxygen isotope record from a stalagmite that grew between 77 ka and 6 ka in northeast Turkey contains both a strong precessional signal, and sub-orbital oscillations similar to those in Greenland ice cores and Chinese speleothem records of monsoon intensity. Fluid inclusion evidence of a negative shift in the isotopic composition of dripwater during the Lateglacial supports interpretation of the isotope curve as an insolation-forced record of changes in rainfall seasonality. The high-amplitude millennial-scale fluctuations are caused by rapid changes in rainfall seasonality and/or switching of moisture source areas, both of which are associated with the stadial–interstadial climatic oscillations linked to the changing modes of the North Atlantic meridional overturning circulation (MOC). Winter rainfall maxima in northeast Turkey coincide with interstadial conditions in Greenland and with periods of intensified Asian monsoon activity. The isotopic shifts in the record are in antiphase with, and are generally much larger in amplitude than, published data from stalagmites in northwest Turkey, most likely because of differing moisture source areas. Carbon isotope ratios are probably kinetically enriched by partial degassing of seepage water in the epikarst, but although often difficult to decypher, particularly during Marine Isotope Stage (MIS) 2, broadly support the interpretations of the oxygen data.
| Item Type: | Article |
|---|---|
| Additional Information: | Funding information: JEM acknowledges funding from the NERC (Grant No. NER/A/2005/13582); CNJ acknowledges funding from the School of Geography, Earth and Environmental Sciences, University of Birmingham; NERC Isotope Geosciences Laboratory, British Geological Survey, and British Institute of Archaeology, Ankara, as part of the ENVΔNET project. |
| Uncontrolled Keywords: | speleothem,oxygen isotopes,carbon isotopes,mediterranean,palaeoclimate,precession,fluid inclusions,last glacial maximum,u–th dating,sdg 14 - life below water ,/dk/atira/pure/sustainabledevelopmentgoals/life_below_water |
| Faculty \ School: | Faculty of Science > School of Environmental Sciences |
| UEA Research Groups: | Faculty of Science > Research Groups > Geosciences Faculty of Science > Research Groups > Geosciences and Natural Hazards (former - to 2017) Faculty of Science > Research Groups > Centre for Ocean and Atmospheric Sciences |
| Related URLs: | |
| Depositing User: | Users 2731 not found. |
| Date Deposited: | 02 Oct 2012 12:52 |
| Last Modified: | 24 Sep 2024 08:56 |
| URI: | https://ueaeprints.uea.ac.uk/id/eprint/39734 |
| DOI: | 10.1016/j.quascirev.2012.04.013 |
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