Age determination of sediment cores close to the Strait of Gibralta
A suit of sediment cores close to and south of the Strait of Gibraltar (12°-36°N, 500-2800 m water depth) were analyzed for stable isotopes in epibenthic foraminifers Cibicidoides wuellerstorfi and Planulina ariminensis. During peak glacial times, the data exhibit higher delta13C values of up to 1.6...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.725956 2023-05-15T17:13:52+02:00 Age determination of sediment cores close to the Strait of Gibralta Zahn, Rainer Sarnthein, Michael Erlenkeuser, Helmut MEDIAN LATITUDE: 30.871500 * MEDIAN LONGITUDE: -10.409222 * SOUTH-BOUND LATITUDE: 21.245000 * WEST-BOUND LONGITUDE: -17.803000 * NORTH-BOUND LATITUDE: 34.960000 * EAST-BOUND LONGITUDE: -7.118000 * DATE/TIME START: 1980-03-20T00:00:00 * DATE/TIME END: 1982-01-22T00:00:00 1987-07-20 application/zip, 6 datasets https://doi.pangaea.de/10.1594/PANGAEA.725956 https://doi.org/10.1594/PANGAEA.725956 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.725956 https://doi.org/10.1594/PANGAEA.725956 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY Supplement to: Zahn, Rainer; Sarnthein, Michael; Erlenkeuser, Helmut (1987): Benthic isotope evidence for changes of the mediterrranean outflow during the late Quaternary. Paleoceanography, 2(6), 543-559, https://doi.org/10.1029/PA002i006p00543 Atlantic Ocean GIK15666-6 GIK15669-1 GIK15670-5 GIK16004-1 GIK16006-1 GIK16017-2 Gravity corer (Kiel type) KOL M53 M53_166 M53_169 M53_170 M60 Meteor (1964) off West Africa Piston corer (Kiel type) SL SUBTROPEX 82 Dataset 1987 ftpangaea https://doi.org/10.1594/PANGAEA.725956 https://doi.org/10.1029/PA002i006p00543 2023-01-20T07:31:28Z A suit of sediment cores close to and south of the Strait of Gibraltar (12°-36°N, 500-2800 m water depth) were analyzed for stable isotopes in epibenthic foraminifers Cibicidoides wuellerstorfi and Planulina ariminensis. During peak glacial times, the data exhibit higher delta13C values of up to 1.6 per mil at intermediate depths near the Strait of Gibraltar (36°N). The values decrease to the south as evidenced by our data, but also to the north as revealed by data of intermediate depth cores north of 38°N (in Duplessy et al. (1987)). Thus, the distribution pattern of delta13C provides crucial evidence for an increased influence of nutrient depleted Mediterranean Outflow Water (MOW) on the glacial northeast Atlantic hydrography. During oxygen isotope Terminations I and II, the meridional carbon isotope gradient indicates a significantly decreased but still active MOW. As deduced from the delta18O fluctuations, the temperatures of the MOW in the Atlantic were lower during glacial times by as much as 5°C. During glacial times and during Termination I the maximum delta13C values of the MOW correlate with minimum values of the North Atlantic Deep Water (NADW) and vice versa. This inverse response to climatic change of the carbon isotope signals of both water masses indicates, that the supply of saline MOW to the north Atlantic may be less important for the formation of NADW than previously assumed. Dataset NADW North Atlantic Deep Water North Atlantic Northeast Atlantic PANGAEA - Data Publisher for Earth & Environmental Science Kol’ ENVELOPE(155.946,155.946,53.834,53.834) ENVELOPE(-17.803000,-7.118000,34.960000,21.245000) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
Atlantic Ocean GIK15666-6 GIK15669-1 GIK15670-5 GIK16004-1 GIK16006-1 GIK16017-2 Gravity corer (Kiel type) KOL M53 M53_166 M53_169 M53_170 M60 Meteor (1964) off West Africa Piston corer (Kiel type) SL SUBTROPEX 82 |
spellingShingle |
Atlantic Ocean GIK15666-6 GIK15669-1 GIK15670-5 GIK16004-1 GIK16006-1 GIK16017-2 Gravity corer (Kiel type) KOL M53 M53_166 M53_169 M53_170 M60 Meteor (1964) off West Africa Piston corer (Kiel type) SL SUBTROPEX 82 Zahn, Rainer Sarnthein, Michael Erlenkeuser, Helmut Age determination of sediment cores close to the Strait of Gibralta |
topic_facet |
Atlantic Ocean GIK15666-6 GIK15669-1 GIK15670-5 GIK16004-1 GIK16006-1 GIK16017-2 Gravity corer (Kiel type) KOL M53 M53_166 M53_169 M53_170 M60 Meteor (1964) off West Africa Piston corer (Kiel type) SL SUBTROPEX 82 |
description |
A suit of sediment cores close to and south of the Strait of Gibraltar (12°-36°N, 500-2800 m water depth) were analyzed for stable isotopes in epibenthic foraminifers Cibicidoides wuellerstorfi and Planulina ariminensis. During peak glacial times, the data exhibit higher delta13C values of up to 1.6 per mil at intermediate depths near the Strait of Gibraltar (36°N). The values decrease to the south as evidenced by our data, but also to the north as revealed by data of intermediate depth cores north of 38°N (in Duplessy et al. (1987)). Thus, the distribution pattern of delta13C provides crucial evidence for an increased influence of nutrient depleted Mediterranean Outflow Water (MOW) on the glacial northeast Atlantic hydrography. During oxygen isotope Terminations I and II, the meridional carbon isotope gradient indicates a significantly decreased but still active MOW. As deduced from the delta18O fluctuations, the temperatures of the MOW in the Atlantic were lower during glacial times by as much as 5°C. During glacial times and during Termination I the maximum delta13C values of the MOW correlate with minimum values of the North Atlantic Deep Water (NADW) and vice versa. This inverse response to climatic change of the carbon isotope signals of both water masses indicates, that the supply of saline MOW to the north Atlantic may be less important for the formation of NADW than previously assumed. |
format |
Dataset |
author |
Zahn, Rainer Sarnthein, Michael Erlenkeuser, Helmut |
author_facet |
Zahn, Rainer Sarnthein, Michael Erlenkeuser, Helmut |
author_sort |
Zahn, Rainer |
title |
Age determination of sediment cores close to the Strait of Gibralta |
title_short |
Age determination of sediment cores close to the Strait of Gibralta |
title_full |
Age determination of sediment cores close to the Strait of Gibralta |
title_fullStr |
Age determination of sediment cores close to the Strait of Gibralta |
title_full_unstemmed |
Age determination of sediment cores close to the Strait of Gibralta |
title_sort |
age determination of sediment cores close to the strait of gibralta |
publisher |
PANGAEA |
publishDate |
1987 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.725956 https://doi.org/10.1594/PANGAEA.725956 |
op_coverage |
MEDIAN LATITUDE: 30.871500 * MEDIAN LONGITUDE: -10.409222 * SOUTH-BOUND LATITUDE: 21.245000 * WEST-BOUND LONGITUDE: -17.803000 * NORTH-BOUND LATITUDE: 34.960000 * EAST-BOUND LONGITUDE: -7.118000 * DATE/TIME START: 1980-03-20T00:00:00 * DATE/TIME END: 1982-01-22T00:00:00 |
long_lat |
ENVELOPE(155.946,155.946,53.834,53.834) ENVELOPE(-17.803000,-7.118000,34.960000,21.245000) |
geographic |
Kol’ |
geographic_facet |
Kol’ |
genre |
NADW North Atlantic Deep Water North Atlantic Northeast Atlantic |
genre_facet |
NADW North Atlantic Deep Water North Atlantic Northeast Atlantic |
op_source |
Supplement to: Zahn, Rainer; Sarnthein, Michael; Erlenkeuser, Helmut (1987): Benthic isotope evidence for changes of the mediterrranean outflow during the late Quaternary. Paleoceanography, 2(6), 543-559, https://doi.org/10.1029/PA002i006p00543 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.725956 https://doi.org/10.1594/PANGAEA.725956 |
op_rights |
CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1594/PANGAEA.725956 https://doi.org/10.1029/PA002i006p00543 |
_version_ |
1766071062479503360 |