| |  Online-Ressource |
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| Verfasst von: | Bonneau, Lucile [VerfasserIn]  |
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| | Colin, Christophe [VerfasserIn] |
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| | Pons‐Branchu, Edwige [VerfasserIn] |
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| | Mienis, Furu [VerfasserIn] |
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| | Tisnérat‐Laborde, Nadine [VerfasserIn] |
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| | Blamart, Dominique [VerfasserIn] |
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| | Elliot, Mary [VerfasserIn] |
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| | Collart, Tim [VerfasserIn] |
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| | Frank, Norbert [VerfasserIn] |
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| | Foliot, Lorna [VerfasserIn] |
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| | Douville, Eric [VerfasserIn] |
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| Titel: | Imprint of holocene climate variability on cold-water coral reef growth at the SW Rockall Trough margin, NE Atlantic |
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| Verf.angabe: | Lucile Bonneau, Christophe Colin, Edwige Pons‐Branchu, Furu Mienis, Nadine Tisnérat‐Laborde, Dominique Blamart, Mary Elliot, Tim Collart, Norbert Frank, Lorna Foliot, and Eric Douville |
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| E-Jahr: | 2018 |
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| Jahr: | 11 AUG 2018 |
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| Umfang: | 16 S. |
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| Fussnoten: | Gesehen am 06.04.2020 |
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| Titel Quelle: | Enthalten in: Geochemistry, geophysics, geosystems |
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| Ort Quelle: | Hoboken, NJ : Wiley, 2000 |
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| Jahr Quelle: | 2018 |
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| Band/Heft Quelle: | 19(2018), 8, Seite 2437-2452 |
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| ISSN Quelle: | 1525-2027 |
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| Abstract: | U-Th ages and temperatures derived from Li/Mg have been measured on coral fragments of Lophelia pertusa and Madrepora oculata collected from two sediment cores, which were taken from cold-water coral (CWC) mounds at 700-790m water depth at the SW Rockall Trough margin. Our data, combined with previous published data, have allowed us to first estimate the occurrence of CWC at the SW Rockall Trough margin during the Holocene and, second, to better constrain the environmental conditions driving variability in CWC growth. CWC abundance is marked by a pronounced increase in the mid-Holocene (∼6 ka) and is modulated by millennial-scale variability throughout the late-Holocene. The mid-Holocene proliferation of CWC coincides with lowest IRD abundances and a major reorganization of the circulation at thermocline depth in the Rockall Trough, marked by the progressive replacement of the fresh-cold Sub-Arctic Intermediate Water (SAIW) by the saltier and nutrient-rich Eastern North Atlantic Water (ENAW). This event must have established a modern-like winter mixed layer and thermocline structure, generating suitable conditions for enhanced surface productivity, downslope transport of food particles, bottom current acceleration at mound depth and thus CWC growth. Several short time intervals of decreased CWC occurrences closely match prominent increases in North Atlantic drift ice and storminess in Northern Europe. We, therefore, propose that high detrital supply and/or changes in the vertical density gradient associated with millennial-scale ice-rafted detritus (IRD) events are the likely controlling factors for CWC growth and subsequent mound formation on the SW Rockall Trough margin. |
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| DOI: | doi:10.1029/2018GC007502 |
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| URL: | Bitte beachten Sie: Dies ist ein Bibliographieeintrag. Ein Volltextzugriff für Mitglieder der Universität besteht hier nur, falls für die entsprechende Zeitschrift/den entsprechenden Sammelband ein Abonnement besteht oder es sich um einen OpenAccess-Titel handelt.
Volltext ; Verlag: https://doi.org/10.1029/2018GC007502 |
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| | Volltext: https://agupubs.onlinelibrary.wiley.com/doi/abs/10.1029/2018GC007502 |
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| | DOI: https://doi.org/10.1029/2018GC007502 |
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| Datenträger: | Online-Ressource |
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| Sprache: | eng |
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| Sach-SW: | cold-water coral mounds |
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| | coral occurrence |
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| | Holocene |
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| | millennial-scale climate variations |
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| | paleo-hydrology |
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| | SW Rockall Trough margin |
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| K10plus-PPN: | 1694089339 |
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| Verknüpfungen: | → Zeitschrift |
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Imprint of holocene climate variability on cold-water coral reef growth at the SW Rockall Trough margin, NE Atlantic / Bonneau, Lucile [VerfasserIn]; 11 AUG 2018 (Online-Ressource)
