Lateglacial-Middle Holocene Stable Isotope Records in Two Coeval Stalagmites from the Bihor Mountains, NW Romania
Oxygen and carbon stable isotope records of two stalagmites from NW Romania provide a continuous climatic record between 14.8 and 5.6 ka BP. The chronology is established by 21 TIMS uranium series ages. Uncertainties in the isotope chronology range between ±20 and ±100 yr. The d18 O values are posit...
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ftunisfloridatam:oai:digitalcommons.usf.edu:gly_facpub-1108 2023-05-15T16:29:34+02:00 Lateglacial-Middle Holocene Stable Isotope Records in Two Coeval Stalagmites from the Bihor Mountains, NW Romania Tămaş, Tudor Onac, Bogdan P. Bojar, Ana-Voica 2005-01-01T08:00:00Z https://digitalcommons.usf.edu/gly_facpub/108 http://gq.pgi.gov.pl/gq/article/view/7378 unknown Digital Commons @ University of South Florida https://digitalcommons.usf.edu/gly_facpub/108 http://gq.pgi.gov.pl/gq/article/view/7378 Geology Faculty Publications NW Romania Lateglacial-Middle Holocene stalagmites stable isotopes uranium-thorium TIMS dating Earth Sciences Geology Physical Sciences and Mathematics article 2005 ftunisfloridatam 2021-10-09T07:05:49Z Oxygen and carbon stable isotope records of two stalagmites from NW Romania provide a continuous climatic record between 14.8 and 5.6 ka BP. The chronology is established by 21 TIMS uranium series ages. Uncertainties in the isotope chronology range between ±20 and ±100 yr. The d18 O values are positively correlated with temperature, whereas d13 C fluctuations suggest changes in soil CO2 production. Lateglacial deposition of both stalagmites started at ~14.8 ka BP. The d18 O records subsequently show a slow decline in temperatures until 12.6 ka BP. Three warmer periods with increased soil productivity occurred at 14.5-13.9 ka BP, 13.6-13.2 ka BP, and 12.9-12.6 ka BP. Lower d18 O and high d13 C values between 12.6 and 11.4 (11.7) ka BP indicate a cold and dry climate during the Younger Dryas (GS-1). During the Early Holocene, three short cold intervals are marked on the d18 O profiles at 11.0-10.6, 10.5-10.2 and 9.4-9.1 ka BP. For the remainder of the Holocene sequence, the d18 O records show less variation between 9 and 7.8 ka BP and gradual warming from 7.6-5.6 ka BP. The speleothem records correlate with the Greenland ice core records and with other proxies throughout Europe and the North Atlantic region. Article in Journal/Newspaper Greenland Greenland ice core ice core North Atlantic Digital Commons University of South Florida (USF) Greenland |
institution |
Open Polar |
collection |
Digital Commons University of South Florida (USF) |
op_collection_id |
ftunisfloridatam |
language |
unknown |
topic |
NW Romania Lateglacial-Middle Holocene stalagmites stable isotopes uranium-thorium TIMS dating Earth Sciences Geology Physical Sciences and Mathematics |
spellingShingle |
NW Romania Lateglacial-Middle Holocene stalagmites stable isotopes uranium-thorium TIMS dating Earth Sciences Geology Physical Sciences and Mathematics Tămaş, Tudor Onac, Bogdan P. Bojar, Ana-Voica Lateglacial-Middle Holocene Stable Isotope Records in Two Coeval Stalagmites from the Bihor Mountains, NW Romania |
topic_facet |
NW Romania Lateglacial-Middle Holocene stalagmites stable isotopes uranium-thorium TIMS dating Earth Sciences Geology Physical Sciences and Mathematics |
description |
Oxygen and carbon stable isotope records of two stalagmites from NW Romania provide a continuous climatic record between 14.8 and 5.6 ka BP. The chronology is established by 21 TIMS uranium series ages. Uncertainties in the isotope chronology range between ±20 and ±100 yr. The d18 O values are positively correlated with temperature, whereas d13 C fluctuations suggest changes in soil CO2 production. Lateglacial deposition of both stalagmites started at ~14.8 ka BP. The d18 O records subsequently show a slow decline in temperatures until 12.6 ka BP. Three warmer periods with increased soil productivity occurred at 14.5-13.9 ka BP, 13.6-13.2 ka BP, and 12.9-12.6 ka BP. Lower d18 O and high d13 C values between 12.6 and 11.4 (11.7) ka BP indicate a cold and dry climate during the Younger Dryas (GS-1). During the Early Holocene, three short cold intervals are marked on the d18 O profiles at 11.0-10.6, 10.5-10.2 and 9.4-9.1 ka BP. For the remainder of the Holocene sequence, the d18 O records show less variation between 9 and 7.8 ka BP and gradual warming from 7.6-5.6 ka BP. The speleothem records correlate with the Greenland ice core records and with other proxies throughout Europe and the North Atlantic region. |
format |
Article in Journal/Newspaper |
author |
Tămaş, Tudor Onac, Bogdan P. Bojar, Ana-Voica |
author_facet |
Tămaş, Tudor Onac, Bogdan P. Bojar, Ana-Voica |
author_sort |
Tămaş, Tudor |
title |
Lateglacial-Middle Holocene Stable Isotope Records in Two Coeval Stalagmites from the Bihor Mountains, NW Romania |
title_short |
Lateglacial-Middle Holocene Stable Isotope Records in Two Coeval Stalagmites from the Bihor Mountains, NW Romania |
title_full |
Lateglacial-Middle Holocene Stable Isotope Records in Two Coeval Stalagmites from the Bihor Mountains, NW Romania |
title_fullStr |
Lateglacial-Middle Holocene Stable Isotope Records in Two Coeval Stalagmites from the Bihor Mountains, NW Romania |
title_full_unstemmed |
Lateglacial-Middle Holocene Stable Isotope Records in Two Coeval Stalagmites from the Bihor Mountains, NW Romania |
title_sort |
lateglacial-middle holocene stable isotope records in two coeval stalagmites from the bihor mountains, nw romania |
publisher |
Digital Commons @ University of South Florida |
publishDate |
2005 |
url |
https://digitalcommons.usf.edu/gly_facpub/108 http://gq.pgi.gov.pl/gq/article/view/7378 |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland Greenland ice core ice core North Atlantic |
genre_facet |
Greenland Greenland ice core ice core North Atlantic |
op_source |
Geology Faculty Publications |
op_relation |
https://digitalcommons.usf.edu/gly_facpub/108 http://gq.pgi.gov.pl/gq/article/view/7378 |
_version_ |
1766019278938570752 |