Millennial-scale environmental controls on cold-water corals in the South Atlantic - a case study from the Argentine margin
Along the northern Argentine margin numerous cold-water coral mounds have been found. Little is known about the present distribution of Bathelia candida , the major framework-forming coral in this region. However, based on the analysis of five sediment cores taken from coral mounds between 990 m and...
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ftdatacite:10.5281/zenodo.5572615 2023-05-15T13:54:31+02:00 Millennial-scale environmental controls on cold-water corals in the South Atlantic - a case study from the Argentine margin Hebbeln, Dierk Da Costa Portilho Ramos, Rodrigo 2021 https://dx.doi.org/10.5281/zenodo.5572615 https://zenodo.org/record/5572615 unknown Zenodo https://zenodo.org/communities/iatlantic-project-collection https://dx.doi.org/10.5281/zenodo.5572616 https://zenodo.org/communities/iatlantic-project-collection Open Access Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/legalcode cc-by-4.0 info:eu-repo/semantics/openAccess CC-BY Text Presentation article-journal ScholarlyArticle 2021 ftdatacite https://doi.org/10.5281/zenodo.5572615 https://doi.org/10.5281/zenodo.5572616 2021-11-05T12:55:41Z Along the northern Argentine margin numerous cold-water coral mounds have been found. Little is known about the present distribution of Bathelia candida , the major framework-forming coral in this region. However, based on the analysis of five sediment cores taken from coral mounds between 990 m and 1,300 m, some information exists about their past development. Coral age datings with the Uranium/Thorium methods reveal three major coral growth or mound aggradation phases: 17-15 kyr BP, 14-12 kyr BP, and 11-8 kyr BP, which are linked to changes in the Atlantic Meridional Overturning Circulation (AMOC) and in the strength of the Antarctic Intermediate Water (AAIW). Interestingly, in water depths >1,150 m coral growth was restricted to the 17-15 kyr period during the AMOC breakdown. After that, corals only returned to the Argentine margin to waters shallower than 1,150 m. Still, a puzzling question remains to why the corals did not return after ~6.5 kyr BP, when the AAIW got back to normal strength. Conference Object Antarc* Antarctic DataCite Metadata Store (German National Library of Science and Technology) Antarctic The Antarctic Argentine |
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DataCite Metadata Store (German National Library of Science and Technology) |
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description |
Along the northern Argentine margin numerous cold-water coral mounds have been found. Little is known about the present distribution of Bathelia candida , the major framework-forming coral in this region. However, based on the analysis of five sediment cores taken from coral mounds between 990 m and 1,300 m, some information exists about their past development. Coral age datings with the Uranium/Thorium methods reveal three major coral growth or mound aggradation phases: 17-15 kyr BP, 14-12 kyr BP, and 11-8 kyr BP, which are linked to changes in the Atlantic Meridional Overturning Circulation (AMOC) and in the strength of the Antarctic Intermediate Water (AAIW). Interestingly, in water depths >1,150 m coral growth was restricted to the 17-15 kyr period during the AMOC breakdown. After that, corals only returned to the Argentine margin to waters shallower than 1,150 m. Still, a puzzling question remains to why the corals did not return after ~6.5 kyr BP, when the AAIW got back to normal strength. |
format |
Conference Object |
author |
Hebbeln, Dierk Da Costa Portilho Ramos, Rodrigo |
spellingShingle |
Hebbeln, Dierk Da Costa Portilho Ramos, Rodrigo Millennial-scale environmental controls on cold-water corals in the South Atlantic - a case study from the Argentine margin |
author_facet |
Hebbeln, Dierk Da Costa Portilho Ramos, Rodrigo |
author_sort |
Hebbeln, Dierk |
title |
Millennial-scale environmental controls on cold-water corals in the South Atlantic - a case study from the Argentine margin |
title_short |
Millennial-scale environmental controls on cold-water corals in the South Atlantic - a case study from the Argentine margin |
title_full |
Millennial-scale environmental controls on cold-water corals in the South Atlantic - a case study from the Argentine margin |
title_fullStr |
Millennial-scale environmental controls on cold-water corals in the South Atlantic - a case study from the Argentine margin |
title_full_unstemmed |
Millennial-scale environmental controls on cold-water corals in the South Atlantic - a case study from the Argentine margin |
title_sort |
millennial-scale environmental controls on cold-water corals in the south atlantic - a case study from the argentine margin |
publisher |
Zenodo |
publishDate |
2021 |
url |
https://dx.doi.org/10.5281/zenodo.5572615 https://zenodo.org/record/5572615 |
geographic |
Antarctic The Antarctic Argentine |
geographic_facet |
Antarctic The Antarctic Argentine |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_relation |
https://zenodo.org/communities/iatlantic-project-collection https://dx.doi.org/10.5281/zenodo.5572616 https://zenodo.org/communities/iatlantic-project-collection |
op_rights |
Open Access Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/legalcode cc-by-4.0 info:eu-repo/semantics/openAccess |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.5281/zenodo.5572615 https://doi.org/10.5281/zenodo.5572616 |
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1766260463676424192 |