Speleothem isotopic evidence of winter rainfall variability in northeast Turkey between 77 and 6 ka
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...
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2012
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Online Access: | https://ueaeprints.uea.ac.uk/id/eprint/39734/ https://doi.org/10.1016/j.quascirev.2012.04.013 |
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ftuniveastangl:oai:ueaeprints.uea.ac.uk:39734 2023-05-15T16:28:01+02:00 Speleothem isotopic evidence of winter rainfall variability in northeast Turkey between 77 and 6 ka Rowe, PJ Mason, JE Andrews, JE Marca, AD Thomas, L van Calsteren, P Jex, CN Vonhof, HB Al-Omari, S 2012-06-29 https://ueaeprints.uea.ac.uk/id/eprint/39734/ https://doi.org/10.1016/j.quascirev.2012.04.013 unknown Rowe, PJ, Mason, JE, Andrews, JE, Marca, AD, Thomas, L, van Calsteren, P, Jex, CN, Vonhof, HB 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 doi:10.1016/j.quascirev.2012.04.013 Article PeerReviewed 2012 ftuniveastangl https://doi.org/10.1016/j.quascirev.2012.04.013 2023-01-30T21:34:04Z 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. Article in Journal/Newspaper Greenland Greenland ice cores North Atlantic University of East Anglia: UEA Digital Repository Greenland Quaternary Science Reviews 45 60 72 |
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University of East Anglia: UEA Digital Repository |
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ftuniveastangl |
language |
unknown |
description |
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. |
format |
Article in Journal/Newspaper |
author |
Rowe, PJ Mason, JE Andrews, JE Marca, AD Thomas, L van Calsteren, P Jex, CN Vonhof, HB Al-Omari, S |
spellingShingle |
Rowe, PJ Mason, JE Andrews, JE Marca, AD Thomas, L van Calsteren, P Jex, CN Vonhof, HB Al-Omari, S Speleothem isotopic evidence of winter rainfall variability in northeast Turkey between 77 and 6 ka |
author_facet |
Rowe, PJ Mason, JE Andrews, JE Marca, AD Thomas, L van Calsteren, P Jex, CN Vonhof, HB Al-Omari, S |
author_sort |
Rowe, PJ |
title |
Speleothem isotopic evidence of winter rainfall variability in northeast Turkey between 77 and 6 ka |
title_short |
Speleothem isotopic evidence of winter rainfall variability in northeast Turkey between 77 and 6 ka |
title_full |
Speleothem isotopic evidence of winter rainfall variability in northeast Turkey between 77 and 6 ka |
title_fullStr |
Speleothem isotopic evidence of winter rainfall variability in northeast Turkey between 77 and 6 ka |
title_full_unstemmed |
Speleothem isotopic evidence of winter rainfall variability in northeast Turkey between 77 and 6 ka |
title_sort |
speleothem isotopic evidence of winter rainfall variability in northeast turkey between 77 and 6 ka |
publishDate |
2012 |
url |
https://ueaeprints.uea.ac.uk/id/eprint/39734/ https://doi.org/10.1016/j.quascirev.2012.04.013 |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland Greenland ice cores North Atlantic |
genre_facet |
Greenland Greenland ice cores North Atlantic |
op_relation |
Rowe, PJ, Mason, JE, Andrews, JE, Marca, AD, Thomas, L, van Calsteren, P, Jex, CN, Vonhof, HB 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 doi:10.1016/j.quascirev.2012.04.013 |
op_doi |
https://doi.org/10.1016/j.quascirev.2012.04.013 |
container_title |
Quaternary Science Reviews |
container_volume |
45 |
container_start_page |
60 |
op_container_end_page |
72 |
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1766017625702268928 |