Palaeoceanographic and hydrodynamic variability for the last 47kyr in the southern Gulf of Cádiz (Atlantic Moroccan margin): Sedimentary and climatic implications
X-ray fluorescence, grain-size and oxygen and carbon stable isotope measurements of a 33m long piston core, recovered from the Pen Duick drift located at the foot of the prominent Pen Duick Escarpment (Atlantic Moroccan margin), are combined to decipher past oceanographic conditions. The data indica...
Published in: | The Depositional Record |
---|---|
Main Authors: | , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
2023
|
Subjects: | |
Online Access: | https://www.vliz.be/imisdocs/publications/387836.pdf |
id |
ftvliz:oai:oma.vliz.be:359629 |
---|---|
record_format |
openpolar |
spelling |
ftvliz:oai:oma.vliz.be:359629 2023-06-11T04:05:11+02:00 Palaeoceanographic and hydrodynamic variability for the last 47kyr in the southern Gulf of Cádiz (Atlantic Moroccan margin): Sedimentary and climatic implications Vandorpe, T. Delivet, S. Blamart, D. Wienberg, C. Bassinot, F. Mienis, F. Stuut, J.-B. W. Van Rooij, D. 2023 application/pdf https://www.vliz.be/imisdocs/publications/387836.pdf en eng info:eu-repo/semantics/altIdentifier/wos/000897699800001 info:eu-repo/semantics/altIdentifier/doi/doi.org/10.1002/dep2.212 https://www.vliz.be/imisdocs/publications/387836.pdf info:eu-repo/semantics/openAccess %3Ci%3EDepositional+Record+9%281%29%3C%2Fi%3E%3A+30-51.+%3Ca+href%3D%22https%3A%2F%2Fdx.doi.org%2F10.1002%2Fdep2.212%22+target%3D%22_blank%22%3Ehttps%3A%2F%2Fdx.doi.org%2F10.1002%2Fdep2.212%3C%2Fa%3E info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2023 ftvliz https://doi.org/10.1002/dep2.212 2023-04-26T22:25:53Z X-ray fluorescence, grain-size and oxygen and carbon stable isotope measurements of a 33m long piston core, recovered from the Pen Duick drift located at the foot of the prominent Pen Duick Escarpment (Atlantic Moroccan margin), are combined to decipher past oceanographic conditions. The data indicate that, similar to the northern Gulf of Cádiz, the Azores Front exerts a major control on the palaeoclimatology of the region. Contrasting the northern Gulf of Cádiz, where Mediterranean Outflow Water is the main water mass at similar water depths, the palaeoceanography of the studied area is mostly influenced by the amount of Antarctic Intermediate Water advected from the south. The density contrast between the Antarctic Intermediate Water and the overlying North Atlantic Central Water determined the strength of the prevailing internal tides and corresponding high current speeds, which drastically impacted the sedimentary record. The most notable impact is the presence of a 7.8kyr condensed section (30.5–22.7ka bp). The formation of the Pen Duick sediment drift was not just controlled by the strength of the bottom currents and the intensity of the internal tides, but also by the amount of (aeolian) sediment supplied to the region. Although variable, drift-growth phases seem to mainly occur during colder periods of the last glacial, that is Heinrich and Dansgaard-Oeschger events during Marine Isotope Stage 3 and late Marine Isotope Stage 2. These periods, characterised by increased aeolian dust supply and higher bottom currents, coincide with a phase of prolific cold-water coral growth and enhanced coral mound formation as recorded in numerous cores obtained from the southern Gulf of Cádiz. This implies that both records (on and off mound cores) are pivotal to provide the complete picture of the palaeoclimatic and palaeoceanographic conditions in the region. Article in Journal/Newspaper Antarc* Antarctic Dansgaard-Oeschger events North Atlantic Flanders Marine Institute (VLIZ): Open Marine Archive (OMA) Antarctic The Antarctic The Depositional Record |
institution |
Open Polar |
collection |
Flanders Marine Institute (VLIZ): Open Marine Archive (OMA) |
op_collection_id |
ftvliz |
language |
English |
description |
X-ray fluorescence, grain-size and oxygen and carbon stable isotope measurements of a 33m long piston core, recovered from the Pen Duick drift located at the foot of the prominent Pen Duick Escarpment (Atlantic Moroccan margin), are combined to decipher past oceanographic conditions. The data indicate that, similar to the northern Gulf of Cádiz, the Azores Front exerts a major control on the palaeoclimatology of the region. Contrasting the northern Gulf of Cádiz, where Mediterranean Outflow Water is the main water mass at similar water depths, the palaeoceanography of the studied area is mostly influenced by the amount of Antarctic Intermediate Water advected from the south. The density contrast between the Antarctic Intermediate Water and the overlying North Atlantic Central Water determined the strength of the prevailing internal tides and corresponding high current speeds, which drastically impacted the sedimentary record. The most notable impact is the presence of a 7.8kyr condensed section (30.5–22.7ka bp). The formation of the Pen Duick sediment drift was not just controlled by the strength of the bottom currents and the intensity of the internal tides, but also by the amount of (aeolian) sediment supplied to the region. Although variable, drift-growth phases seem to mainly occur during colder periods of the last glacial, that is Heinrich and Dansgaard-Oeschger events during Marine Isotope Stage 3 and late Marine Isotope Stage 2. These periods, characterised by increased aeolian dust supply and higher bottom currents, coincide with a phase of prolific cold-water coral growth and enhanced coral mound formation as recorded in numerous cores obtained from the southern Gulf of Cádiz. This implies that both records (on and off mound cores) are pivotal to provide the complete picture of the palaeoclimatic and palaeoceanographic conditions in the region. |
format |
Article in Journal/Newspaper |
author |
Vandorpe, T. Delivet, S. Blamart, D. Wienberg, C. Bassinot, F. Mienis, F. Stuut, J.-B. W. Van Rooij, D. |
spellingShingle |
Vandorpe, T. Delivet, S. Blamart, D. Wienberg, C. Bassinot, F. Mienis, F. Stuut, J.-B. W. Van Rooij, D. Palaeoceanographic and hydrodynamic variability for the last 47kyr in the southern Gulf of Cádiz (Atlantic Moroccan margin): Sedimentary and climatic implications |
author_facet |
Vandorpe, T. Delivet, S. Blamart, D. Wienberg, C. Bassinot, F. Mienis, F. Stuut, J.-B. W. Van Rooij, D. |
author_sort |
Vandorpe, T. |
title |
Palaeoceanographic and hydrodynamic variability for the last 47kyr in the southern Gulf of Cádiz (Atlantic Moroccan margin): Sedimentary and climatic implications |
title_short |
Palaeoceanographic and hydrodynamic variability for the last 47kyr in the southern Gulf of Cádiz (Atlantic Moroccan margin): Sedimentary and climatic implications |
title_full |
Palaeoceanographic and hydrodynamic variability for the last 47kyr in the southern Gulf of Cádiz (Atlantic Moroccan margin): Sedimentary and climatic implications |
title_fullStr |
Palaeoceanographic and hydrodynamic variability for the last 47kyr in the southern Gulf of Cádiz (Atlantic Moroccan margin): Sedimentary and climatic implications |
title_full_unstemmed |
Palaeoceanographic and hydrodynamic variability for the last 47kyr in the southern Gulf of Cádiz (Atlantic Moroccan margin): Sedimentary and climatic implications |
title_sort |
palaeoceanographic and hydrodynamic variability for the last 47kyr in the southern gulf of cádiz (atlantic moroccan margin): sedimentary and climatic implications |
publishDate |
2023 |
url |
https://www.vliz.be/imisdocs/publications/387836.pdf |
geographic |
Antarctic The Antarctic |
geographic_facet |
Antarctic The Antarctic |
genre |
Antarc* Antarctic Dansgaard-Oeschger events North Atlantic |
genre_facet |
Antarc* Antarctic Dansgaard-Oeschger events North Atlantic |
op_source |
%3Ci%3EDepositional+Record+9%281%29%3C%2Fi%3E%3A+30-51.+%3Ca+href%3D%22https%3A%2F%2Fdx.doi.org%2F10.1002%2Fdep2.212%22+target%3D%22_blank%22%3Ehttps%3A%2F%2Fdx.doi.org%2F10.1002%2Fdep2.212%3C%2Fa%3E |
op_relation |
info:eu-repo/semantics/altIdentifier/wos/000897699800001 info:eu-repo/semantics/altIdentifier/doi/doi.org/10.1002/dep2.212 https://www.vliz.be/imisdocs/publications/387836.pdf |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1002/dep2.212 |
container_title |
The Depositional Record |
_version_ |
1768372757657026560 |