An 80 kyr-long continuous speleothem record from Dim Cave, SW Turkey with paleoclimatic implications for the Eastern Mediterranean

Unal-Imer, Ezgi, Shulmeister, James, Zhao, Jian-Xin, Tonguc Uysal, I., Feng, Yue-Xing, Duc Nguyen, Ai and Yuce, Galip (2015) An 80 kyr-long continuous speleothem record from Dim Cave, SW Turkey with paleoclimatic implications for the Eastern Mediterranean. Scientific Reports, 5 Art No.: 13560: . doi:10.1038/srep13560


Author Unal-Imer, Ezgi
Shulmeister, James
Zhao, Jian-Xin
Tonguc Uysal, I.
Feng, Yue-Xing
Duc Nguyen, Ai
Yuce, Galip
Title An 80 kyr-long continuous speleothem record from Dim Cave, SW Turkey with paleoclimatic implications for the Eastern Mediterranean
Journal name Scientific Reports   Check publisher's open access policy
ISSN 2045-2322
Publication date 2015-09-04
Year available 2015
Sub-type Article (original research)
DOI 10.1038/srep13560
Open Access Status DOI
Volume 5
Issue Art No.: 13560
Total pages 9
Place of publication London, United Kingdom
Publisher Nature Publishing Group
Collection year 2016
Language eng
Formatted abstract
Speleothem-based stable isotope records are valuable in sub-humid and semi-arid settings where many other terrestrial climate proxies are fragmentary. The Eastern Mediterranean is one such region. Here we present an 80-kyr-long precisely-dated (by U-series) and high-resolution oxygen (δ18O) and carbon (δ13C) records from Dim Cave (~36°N) in SW Turkey. The glacial-interglacial δ18O variations in the Dim Cave speleothem are best explained in terms of changes in the trajectories of winter westerly air masses. These are along a northerly (European) track (isotopically less depleted) during the early last glaciation but are gradually depressed southward closer to the modern westerly track along the North African coast (more depleted) after c.50 kyr and remain in the southern track through the Last Glacial Maximum. The southward displacement of the westerly track reflects growth of the Fennoscandian ice sheet and its impact on westerly wind fields. Changes in δ13C are interpreted as reflecting soil organic matter composition and/or thickness. δ13C values are significantly more negative in interglacials reflecting active carbonic acid production in the soil and less negative in glacial times reflecting carbonate rock values. Several Heinrich events are recorded in the Dim record indicating intensification of westerly flow across this part of the EM.
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

 
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