Environmental boundary conditions of cold-water coral mound growth over the last 3 Million years in the Porcupine Seabight, Northeast Atlantic
IODP Expedition 307 made it for the first time possible to investigate the entire body of a cold-water coral carbonate mound. Here we provide new insights into the long-term history of Challenger Mound on the European continental margin off Ireland. This study is based on age determinations (230Th/U...
Published in: | Deep Sea Research Part II: Topical Studies in Oceanography |
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Format: | Article in Journal/Newspaper |
Language: | English |
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Online Access: | https://oceanrep.geomar.de/id/eprint/21606/ https://oceanrep.geomar.de/id/eprint/21606/1/Raddatz.pdf https://doi.org/10.1016/j.dsr2.2013.06.009 |
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ftoceanrep:oai:oceanrep.geomar.de:21606 2024-04-21T08:06:49+00:00 Environmental boundary conditions of cold-water coral mound growth over the last 3 Million years in the Porcupine Seabight, Northeast Atlantic Raddatz, Jacek Rüggeberg, Andres Liebetrau, Volker Foubert, Anneleen Hathorne, Ed C. Fietzke, Jan Eisenhauer, Anton Dullo, Wolf-Christian 2014-01 text https://oceanrep.geomar.de/id/eprint/21606/ https://oceanrep.geomar.de/id/eprint/21606/1/Raddatz.pdf https://doi.org/10.1016/j.dsr2.2013.06.009 en eng Elsevier https://oceanrep.geomar.de/id/eprint/21606/1/Raddatz.pdf Raddatz, J., Rüggeberg, A., Liebetrau, V., Foubert, A., Hathorne, E. C. , Fietzke, J. , Eisenhauer, A. and Dullo, W. C. (2014) Environmental boundary conditions of cold-water coral mound growth over the last 3 Million years in the Porcupine Seabight, Northeast Atlantic. Deep Sea Research Part II: Topical Studies in Oceanography, 99 . pp. 227-236. DOI 10.1016/j.dsr2.2013.06.009 <https://doi.org/10.1016/j.dsr2.2013.06.009>. doi:10.1016/j.dsr2.2013.06.009 info:eu-repo/semantics/restrictedAccess Article PeerReviewed 2014 ftoceanrep https://doi.org/10.1016/j.dsr2.2013.06.009 2024-03-27T17:48:37Z IODP Expedition 307 made it for the first time possible to investigate the entire body of a cold-water coral carbonate mound. Here we provide new insights into the long-term history of Challenger Mound on the European continental margin off Ireland. This study is based on age determinations (230Th/U, 87Sr/86Sr) and geochemical signals (Mg/Li and Ba/Ca) measured in the scleractinian cold-water coral Lophelia pertusa from IODP Site 1317 in the Porcupine Seabight. The paleoceanographic reconstructions reveal that coral growth in the Porcupine Seabight was restricted to specific oceanographic conditions such as enhanced export of primary production and Bottom-Water Temperatures (BWT) between ∼8–10 °C, related to the water mass stratification of the Mediterranean Outflow Water (MOW) and Eastern North Atlantic Water (ENAW). The geochemical signals from the coral skeletons can be explained by the close interaction between cold-water coral growth, sea-surface productivity and the surrounding water masses - the boundary layer between MOW and ENAW. Enhanced sea-surface productivity and the build-up of a stable water mass stratification between ENAW and MOW caused enhanced nutrient supply at intermediate water depths and facilitated a steady mound growth between∼3.0 - 2.1 Ma. With the decrease in sea-surface productivity and related reduced export productivity the food supply was insufficient for rapid coral mound growth between∼1.7 - 1 Ma. During the late Pleistocene (over the last∼0.5 Myr) mound growth was restricted to interglacial periods. During glacials the water mass boundary between ENAW/MOW probably was below the mound summit and hence food supply was not sufficient for corals to grow. Article in Journal/Newspaper Lophelia pertusa North Atlantic Northeast Atlantic OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) Deep Sea Research Part II: Topical Studies in Oceanography 99 227 236 |
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Open Polar |
collection |
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) |
op_collection_id |
ftoceanrep |
language |
English |
description |
IODP Expedition 307 made it for the first time possible to investigate the entire body of a cold-water coral carbonate mound. Here we provide new insights into the long-term history of Challenger Mound on the European continental margin off Ireland. This study is based on age determinations (230Th/U, 87Sr/86Sr) and geochemical signals (Mg/Li and Ba/Ca) measured in the scleractinian cold-water coral Lophelia pertusa from IODP Site 1317 in the Porcupine Seabight. The paleoceanographic reconstructions reveal that coral growth in the Porcupine Seabight was restricted to specific oceanographic conditions such as enhanced export of primary production and Bottom-Water Temperatures (BWT) between ∼8–10 °C, related to the water mass stratification of the Mediterranean Outflow Water (MOW) and Eastern North Atlantic Water (ENAW). The geochemical signals from the coral skeletons can be explained by the close interaction between cold-water coral growth, sea-surface productivity and the surrounding water masses - the boundary layer between MOW and ENAW. Enhanced sea-surface productivity and the build-up of a stable water mass stratification between ENAW and MOW caused enhanced nutrient supply at intermediate water depths and facilitated a steady mound growth between∼3.0 - 2.1 Ma. With the decrease in sea-surface productivity and related reduced export productivity the food supply was insufficient for rapid coral mound growth between∼1.7 - 1 Ma. During the late Pleistocene (over the last∼0.5 Myr) mound growth was restricted to interglacial periods. During glacials the water mass boundary between ENAW/MOW probably was below the mound summit and hence food supply was not sufficient for corals to grow. |
format |
Article in Journal/Newspaper |
author |
Raddatz, Jacek Rüggeberg, Andres Liebetrau, Volker Foubert, Anneleen Hathorne, Ed C. Fietzke, Jan Eisenhauer, Anton Dullo, Wolf-Christian |
spellingShingle |
Raddatz, Jacek Rüggeberg, Andres Liebetrau, Volker Foubert, Anneleen Hathorne, Ed C. Fietzke, Jan Eisenhauer, Anton Dullo, Wolf-Christian Environmental boundary conditions of cold-water coral mound growth over the last 3 Million years in the Porcupine Seabight, Northeast Atlantic |
author_facet |
Raddatz, Jacek Rüggeberg, Andres Liebetrau, Volker Foubert, Anneleen Hathorne, Ed C. Fietzke, Jan Eisenhauer, Anton Dullo, Wolf-Christian |
author_sort |
Raddatz, Jacek |
title |
Environmental boundary conditions of cold-water coral mound growth over the last 3 Million years in the Porcupine Seabight, Northeast Atlantic |
title_short |
Environmental boundary conditions of cold-water coral mound growth over the last 3 Million years in the Porcupine Seabight, Northeast Atlantic |
title_full |
Environmental boundary conditions of cold-water coral mound growth over the last 3 Million years in the Porcupine Seabight, Northeast Atlantic |
title_fullStr |
Environmental boundary conditions of cold-water coral mound growth over the last 3 Million years in the Porcupine Seabight, Northeast Atlantic |
title_full_unstemmed |
Environmental boundary conditions of cold-water coral mound growth over the last 3 Million years in the Porcupine Seabight, Northeast Atlantic |
title_sort |
environmental boundary conditions of cold-water coral mound growth over the last 3 million years in the porcupine seabight, northeast atlantic |
publisher |
Elsevier |
publishDate |
2014 |
url |
https://oceanrep.geomar.de/id/eprint/21606/ https://oceanrep.geomar.de/id/eprint/21606/1/Raddatz.pdf https://doi.org/10.1016/j.dsr2.2013.06.009 |
genre |
Lophelia pertusa North Atlantic Northeast Atlantic |
genre_facet |
Lophelia pertusa North Atlantic Northeast Atlantic |
op_relation |
https://oceanrep.geomar.de/id/eprint/21606/1/Raddatz.pdf Raddatz, J., Rüggeberg, A., Liebetrau, V., Foubert, A., Hathorne, E. C. , Fietzke, J. , Eisenhauer, A. and Dullo, W. C. (2014) Environmental boundary conditions of cold-water coral mound growth over the last 3 Million years in the Porcupine Seabight, Northeast Atlantic. Deep Sea Research Part II: Topical Studies in Oceanography, 99 . pp. 227-236. DOI 10.1016/j.dsr2.2013.06.009 <https://doi.org/10.1016/j.dsr2.2013.06.009>. doi:10.1016/j.dsr2.2013.06.009 |
op_rights |
info:eu-repo/semantics/restrictedAccess |
op_doi |
https://doi.org/10.1016/j.dsr2.2013.06.009 |
container_title |
Deep Sea Research Part II: Topical Studies in Oceanography |
container_volume |
99 |
container_start_page |
227 |
op_container_end_page |
236 |
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1796946259752255488 |