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 300m of elevation. The expansion of these coral carbonate mounds is paced by climatic changes during the past 2.7Myr...
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ftunivgent:oai:archive.ugent.be:8522927 2023-06-11T04:13:53+02:00 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 application/pdf https://biblio.ugent.be/publication/8522927 http://hdl.handle.net/1854/LU-8522927 https://doi.org/10.1002/2015PA002859 https://biblio.ugent.be/publication/8522927/file/8522928 eng eng https://biblio.ugent.be/publication/8522927 http://hdl.handle.net/1854/LU-8522927 http://dx.doi.org/10.1002/2015PA002859 https://biblio.ugent.be/publication/8522927/file/8522928 No license (in copyright) info:eu-repo/semantics/restrictedAccess PALEOCEANOGRAPHY ISSN: 0883-8305 ISSN: 1944-9186 Earth and Environmental Sciences DEEP-SEA CORALS LAST GLACIAL MAXIMUM LOPHELIA-PERTUSA SCLERACTINIA IODP EXP. 307 PORCUPINE SEABIGHT NE-ATLANTIC MEDITERRANEAN OUTFLOW PROPELLER MOUND GROWTH HISTORY CHALLENGER MOUND cold-water corals carbonate mounds seawater density Pleistocene northeast Atlantic journalArticle info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2016 ftunivgent https://doi.org/10.1002/2015PA002859 2023-05-10T22:21:24Z 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 300m of elevation. The expansion of these coral carbonate mounds is paced by climatic changes during the past 2.7Myr. 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 27.7kgm(-3) (sigma 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 Lophelia pertusa Northeast Atlantic Ghent University Academic Bibliography Porcupine Seabight ENVELOPE(-13.000,-13.000,50.500,50.500) Paleoceanography 31 3 365 379 |
institution |
Open Polar |
collection |
Ghent University Academic Bibliography |
op_collection_id |
ftunivgent |
language |
English |
topic |
Earth and Environmental Sciences DEEP-SEA CORALS LAST GLACIAL MAXIMUM LOPHELIA-PERTUSA SCLERACTINIA IODP EXP. 307 PORCUPINE SEABIGHT NE-ATLANTIC MEDITERRANEAN OUTFLOW PROPELLER MOUND GROWTH HISTORY CHALLENGER MOUND cold-water corals carbonate mounds seawater density Pleistocene northeast Atlantic |
spellingShingle |
Earth and Environmental Sciences DEEP-SEA CORALS LAST GLACIAL MAXIMUM LOPHELIA-PERTUSA SCLERACTINIA IODP EXP. 307 PORCUPINE SEABIGHT NE-ATLANTIC MEDITERRANEAN OUTFLOW PROPELLER MOUND GROWTH HISTORY CHALLENGER MOUND cold-water corals carbonate mounds seawater density Pleistocene northeast Atlantic 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 |
topic_facet |
Earth and Environmental Sciences DEEP-SEA CORALS LAST GLACIAL MAXIMUM LOPHELIA-PERTUSA SCLERACTINIA IODP EXP. 307 PORCUPINE SEABIGHT NE-ATLANTIC MEDITERRANEAN OUTFLOW PROPELLER MOUND GROWTH HISTORY CHALLENGER MOUND cold-water corals carbonate mounds seawater density Pleistocene northeast Atlantic |
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 300m of elevation. The expansion of these coral carbonate mounds is paced by climatic changes during the past 2.7Myr. 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 27.7kgm(-3) (sigma 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 |
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 |
publishDate |
2016 |
url |
https://biblio.ugent.be/publication/8522927 http://hdl.handle.net/1854/LU-8522927 https://doi.org/10.1002/2015PA002859 https://biblio.ugent.be/publication/8522927/file/8522928 |
long_lat |
ENVELOPE(-13.000,-13.000,50.500,50.500) |
geographic |
Porcupine Seabight |
geographic_facet |
Porcupine Seabight |
genre |
Lophelia pertusa Northeast Atlantic |
genre_facet |
Lophelia pertusa Northeast Atlantic |
op_source |
PALEOCEANOGRAPHY ISSN: 0883-8305 ISSN: 1944-9186 |
op_relation |
https://biblio.ugent.be/publication/8522927 http://hdl.handle.net/1854/LU-8522927 http://dx.doi.org/10.1002/2015PA002859 https://biblio.ugent.be/publication/8522927/file/8522928 |
op_rights |
No license (in copyright) info:eu-repo/semantics/restrictedAccess |
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 |
_version_ |
1768391292027404288 |