Paleoseawater density reconstruction and its implication for cold-water coral carbonate mounds in the northeast Atlantic through time
Carbonate buildups and mounds are impressive biogenic structures throughout Earth history. In the recent NE Atlantic, cold-water coral (CWC) reefs form giant carbonate mounds of up to 300 m of elevation. The expansion of these coral carbonate mounds is paced by climatic changes during the past 2.7 M...
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ftoceanrep:oai:oceanrep.geomar.de:32094 2024-04-21T08:08:28+00:00 Paleoseawater density reconstruction and its implication for cold-water coral carbonate mounds in the northeast Atlantic through time Rüggeberg, Andres Flögel, Sascha Dullo, Wolf-Christian Raddatz, Jacek Liebetrau, Volker 2016-03-12 text https://oceanrep.geomar.de/id/eprint/32094/ https://oceanrep.geomar.de/id/eprint/32094/1/palo20302.pdf https://doi.org/10.1002/2015PA002859 en eng AGU (American Geophysical Union) Wiley https://oceanrep.geomar.de/id/eprint/32094/1/palo20302.pdf Rüggeberg, A., Flögel, S., Dullo, W. C. , Raddatz, J. and Liebetrau, V. (2016) Paleoseawater density reconstruction and its implication for cold-water coral carbonate mounds in the northeast Atlantic through time. Open Access Paleoceanography, 31 (3). pp. 365-379. DOI 10.1002/2015PA002859 <https://doi.org/10.1002/2015PA002859>. doi:10.1002/2015PA002859 info:eu-repo/semantics/openAccess Article PeerReviewed 2016 ftoceanrep https://doi.org/10.1002/2015PA002859 2024-03-27T17:48:37Z Carbonate buildups and mounds are impressive biogenic structures throughout Earth history. In the recent NE Atlantic, cold-water coral (CWC) reefs form giant carbonate mounds of up to 300 m of elevation. The expansion of these coral carbonate mounds is paced by climatic changes during the past 2.7 Myr. Environmental control on their development is directly linked to controls on its main constructors, the reef-building CWCs. Seawater density has been identified as one of the main controlling parameter of CWC growth in the NE Atlantic. One possibility is the formation of a pycnocline above the carbonate mounds, which is increasing the hydrodynamic regime, supporting elevated food supply, and possibly facilitating the distribution of coral larvae. The potential to reconstruct past seawater densities from stable oxygen isotopes of benthic foraminifera has been further developed: a regional equation gives reliable results for three different settings, peak interglacials (e.g., Holocene), peak glacials (e.g., Last Glacial Maximum), and intermediate setting (between the two extremes). Seawater densities are reconstructed for two different NE Atlantic CWC carbonate mounds in the Porcupine Seabight indicating that the development of carbonate mounds is predominantly found at a seawater density range between 27.3 and 27.7 kg m−3 (σΘ notation). Comparable to recent conditions, we interpret the reconstructed density range as a pycnocline serving as boundary layer, on which currents develop, carrying nutrition and possibly coral larvae. The close correlation of CWC reef growth with reconstructed seawater densities through the Pleistocene highlights the importance of pycnoclines and intermediate water mass dynamics. Article in Journal/Newspaper Northeast Atlantic OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) Paleoceanography 31 3 365 379 |
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Open Polar |
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OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) |
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ftoceanrep |
language |
English |
description |
Carbonate buildups and mounds are impressive biogenic structures throughout Earth history. In the recent NE Atlantic, cold-water coral (CWC) reefs form giant carbonate mounds of up to 300 m of elevation. The expansion of these coral carbonate mounds is paced by climatic changes during the past 2.7 Myr. Environmental control on their development is directly linked to controls on its main constructors, the reef-building CWCs. Seawater density has been identified as one of the main controlling parameter of CWC growth in the NE Atlantic. One possibility is the formation of a pycnocline above the carbonate mounds, which is increasing the hydrodynamic regime, supporting elevated food supply, and possibly facilitating the distribution of coral larvae. The potential to reconstruct past seawater densities from stable oxygen isotopes of benthic foraminifera has been further developed: a regional equation gives reliable results for three different settings, peak interglacials (e.g., Holocene), peak glacials (e.g., Last Glacial Maximum), and intermediate setting (between the two extremes). Seawater densities are reconstructed for two different NE Atlantic CWC carbonate mounds in the Porcupine Seabight indicating that the development of carbonate mounds is predominantly found at a seawater density range between 27.3 and 27.7 kg m−3 (σΘ notation). Comparable to recent conditions, we interpret the reconstructed density range as a pycnocline serving as boundary layer, on which currents develop, carrying nutrition and possibly coral larvae. The close correlation of CWC reef growth with reconstructed seawater densities through the Pleistocene highlights the importance of pycnoclines and intermediate water mass dynamics. |
format |
Article in Journal/Newspaper |
author |
Rüggeberg, Andres Flögel, Sascha Dullo, Wolf-Christian Raddatz, Jacek Liebetrau, Volker |
spellingShingle |
Rüggeberg, Andres Flögel, Sascha Dullo, Wolf-Christian Raddatz, Jacek Liebetrau, Volker Paleoseawater density reconstruction and its implication for cold-water coral carbonate mounds in the northeast Atlantic through time |
author_facet |
Rüggeberg, Andres Flögel, Sascha Dullo, Wolf-Christian Raddatz, Jacek Liebetrau, Volker |
author_sort |
Rüggeberg, Andres |
title |
Paleoseawater density reconstruction and its implication for cold-water coral carbonate mounds in the northeast Atlantic through time |
title_short |
Paleoseawater density reconstruction and its implication for cold-water coral carbonate mounds in the northeast Atlantic through time |
title_full |
Paleoseawater density reconstruction and its implication for cold-water coral carbonate mounds in the northeast Atlantic through time |
title_fullStr |
Paleoseawater density reconstruction and its implication for cold-water coral carbonate mounds in the northeast Atlantic through time |
title_full_unstemmed |
Paleoseawater density reconstruction and its implication for cold-water coral carbonate mounds in the northeast Atlantic through time |
title_sort |
paleoseawater density reconstruction and its implication for cold-water coral carbonate mounds in the northeast atlantic through time |
publisher |
AGU (American Geophysical Union) |
publishDate |
2016 |
url |
https://oceanrep.geomar.de/id/eprint/32094/ https://oceanrep.geomar.de/id/eprint/32094/1/palo20302.pdf https://doi.org/10.1002/2015PA002859 |
genre |
Northeast Atlantic |
genre_facet |
Northeast Atlantic |
op_relation |
https://oceanrep.geomar.de/id/eprint/32094/1/palo20302.pdf Rüggeberg, A., Flögel, S., Dullo, W. C. , Raddatz, J. and Liebetrau, V. (2016) Paleoseawater density reconstruction and its implication for cold-water coral carbonate mounds in the northeast Atlantic through time. Open Access Paleoceanography, 31 (3). pp. 365-379. DOI 10.1002/2015PA002859 <https://doi.org/10.1002/2015PA002859>. doi:10.1002/2015PA002859 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1002/2015PA002859 |
container_title |
Paleoceanography |
container_volume |
31 |
container_issue |
3 |
container_start_page |
365 |
op_container_end_page |
379 |
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1796948807600046080 |