An 80 kyr-long continuous speleothem record from Dim Cave, SW Turkey with paleoclimatic implications for the Eastern Mediterranean
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 (δ 18...
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crspringernat:10.1038/srep13560 2023-05-15T15:52:49+02:00 An 80 kyr-long continuous speleothem record from Dim Cave, SW Turkey with paleoclimatic implications for the Eastern Mediterranean Ünal-İmer, Ezgi Shulmeister, James Zhao, Jian-Xin Tonguç Uysal, I. Feng, Yue-Xing Duc Nguyen, Ai Yüce, Galip 2015 http://dx.doi.org/10.1038/srep13560 http://www.nature.com/articles/srep13560 http://www.nature.com/articles/srep13560.pdf en eng Springer Science and Business Media LLC https://creativecommons.org/licenses/by/4.0 https://creativecommons.org/licenses/by/4.0 CC-BY Scientific Reports volume 5, issue 1 ISSN 2045-2322 Multidisciplinary journal-article 2015 crspringernat https://doi.org/10.1038/srep13560 2022-01-04T16:49:02Z 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 (δ 18 O) and carbon (δ 13 C) records from Dim Cave (~36°N) in SW Turkey. The glacial-interglacial δ 18 O 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 δ 13 C are interpreted as reflecting soil organic matter composition and/or thickness. δ 13 C 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. Article in Journal/Newspaper Carbonic acid Fennoscandian Ice Sheet Springer Nature (via Crossref) Scientific Reports 5 1 |
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English |
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Multidisciplinary Ünal-İmer, Ezgi Shulmeister, James Zhao, Jian-Xin Tonguç Uysal, I. Feng, Yue-Xing Duc Nguyen, Ai Yüce, Galip An 80 kyr-long continuous speleothem record from Dim Cave, SW Turkey with paleoclimatic implications for the Eastern Mediterranean |
topic_facet |
Multidisciplinary |
description |
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 (δ 18 O) and carbon (δ 13 C) records from Dim Cave (~36°N) in SW Turkey. The glacial-interglacial δ 18 O 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 δ 13 C are interpreted as reflecting soil organic matter composition and/or thickness. δ 13 C 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. |
format |
Article in Journal/Newspaper |
author |
Ünal-İmer, Ezgi Shulmeister, James Zhao, Jian-Xin Tonguç Uysal, I. Feng, Yue-Xing Duc Nguyen, Ai Yüce, Galip |
author_facet |
Ünal-İmer, Ezgi Shulmeister, James Zhao, Jian-Xin Tonguç Uysal, I. Feng, Yue-Xing Duc Nguyen, Ai Yüce, Galip |
author_sort |
Ünal-İmer, Ezgi |
title |
An 80 kyr-long continuous speleothem record from Dim Cave, SW Turkey with paleoclimatic implications for the Eastern Mediterranean |
title_short |
An 80 kyr-long continuous speleothem record from Dim Cave, SW Turkey with paleoclimatic implications for the Eastern Mediterranean |
title_full |
An 80 kyr-long continuous speleothem record from Dim Cave, SW Turkey with paleoclimatic implications for the Eastern Mediterranean |
title_fullStr |
An 80 kyr-long continuous speleothem record from Dim Cave, SW Turkey with paleoclimatic implications for the Eastern Mediterranean |
title_full_unstemmed |
An 80 kyr-long continuous speleothem record from Dim Cave, SW Turkey with paleoclimatic implications for the Eastern Mediterranean |
title_sort |
80 kyr-long continuous speleothem record from dim cave, sw turkey with paleoclimatic implications for the eastern mediterranean |
publisher |
Springer Science and Business Media LLC |
publishDate |
2015 |
url |
http://dx.doi.org/10.1038/srep13560 http://www.nature.com/articles/srep13560 http://www.nature.com/articles/srep13560.pdf |
genre |
Carbonic acid Fennoscandian Ice Sheet |
genre_facet |
Carbonic acid Fennoscandian Ice Sheet |
op_source |
Scientific Reports volume 5, issue 1 ISSN 2045-2322 |
op_rights |
https://creativecommons.org/licenses/by/4.0 https://creativecommons.org/licenses/by/4.0 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1038/srep13560 |
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Scientific Reports |
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5 |
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1766387912283258880 |