Data Description

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Citation:
Wienberg, C et al. (2011): Glacial cold-water coral: ages, isotope concentrations and ratios. doi:10.1594/PANGAEA.770171,
Supplement to: Wienberg, Claudia; Frank, Norbert; Mertens, Kenneth Neil; Stuut, Jan-Berend W; Marchant, Margarita; Fietzke, Jan; Mienis, Furu; Hebbeln, Dierk (2010): Glacial cold-water corals growth in the Gulf of Cádiz: Implications of increased palaeo-productivity. Earth and Planetary Science Letters, 298, 405-416, doi:10.1016/j.epsl.2010.08.017
Abstract:
A set of 40 Uranium-series datings obtained on the reef-forming scleractinian cold-water corals Lophelia pertusa and Madrepora oculata revealed that during the past 400 kyr their occurrence in the Gulf of Cádiz (GoC) was almost exclusively restricted to glacial periods. This result strengthens the outcomes of former studies that coral growth in the temperate NE Atlantic encompassing the French, Iberian and Moroccan margins dominated during glacial periods, whereas in the higher latitudes (Irish and Norwegian margins) extended coral growth prevailed during interglacial periods. Thus it appears that the biogeographical limits for sustained cold-water coral growth along the NE Atlantic margin are strongly related to climate change. By focussing on the last glacial-interglacial cycle, this study shows that palaeo-productivity was increased during the last glacial. This was likely driven by the fertilisation effect of an increased input of aeolian dust and locally intensified upwelling. After the Younger Dryas cold event, the input of aeolian dust and productivity significantly decreased concurrent with an increase in water temperatures in the GoC. This primarily resulted in reduced food availability and caused a widespread demise of the formerly thriving coral ecosystems. Moreover, these climate induced changes most likely caused a latitudinal shift of areas withoptimum coral growth conditions towards the northern NE Atlantic where more suitable environmental conditions established with the onset of the Holocene.
Project(s):
Coverage:
Median Latitude: 35.653215 * Median Longitude: -7.082690 * South-bound Latitude: 34.991500 * West-bound Longitude: -7.404333 * North-bound Latitude: 36.183000 * East-bound Longitude: -6.787500
Date/Time Start: 2003-12-02T08:30:00 * Date/Time End: 2006-05-14T16:36:00
Minimum DEPTH, sediment/rock: 0.03 m * Maximum DEPTH, sediment/rock: 5.20 m
Event(s):
GeoB9018-1 * * Latitude Start: 36.183000 * Longitude Start: -7.306167 * Latitude End: 36.183000 * Longitude End: -7.306167 * Date/Time Start: 2003-12-02T08:30:00 * Date/Time End: 2003-12-02T09:05:00 * Elevation: -702.0 m * Location: Hesperides mud volcano * * Campaign: SO175 (GAP) * * Basis: Sonne * * Device: Gravity corer (GC) * * Comment: 3.47m
GeoB9031-1 * * Latitude Start: 36.094667 * Longitude Start: -7.402833 * Latitude End: 36.095833 * Longitude End: -7.388000 * Date/Time Start: 2003-12-04T17:35:00 * Date/Time End: 2003-12-04T18:20:00 * Elevation: -897.0 m * Location: Faro/Almazan mud volcano * * Campaign: SO175 (GAP) * * Basis: Sonne * * Device: Gravity corer (GC) * * Comment: 4.84m
GeoB9032-1 * * Latitude Start: 36.090500 * Longitude Start: -7.404333 * Latitude End: 36.092500 * Longitude End: -7.392833 * Date/Time Start: 2003-12-04T18:30:00 * Date/Time End: 2003-12-04T19:09:00 * Elevation: -843.0 m * Location: Faro/Almazan mud volcano * * Campaign: SO175 (GAP) * * Basis: Sonne * * Device: Gravity corer (GC) * * Comment: 2.20m
+
Parameter(s):
#NameShort NameUnitPrincipal InvestigatorMethodComment
1Event label *Event
2Comment of event *Comment
3Latitude of event *Latitude
4Longitude of event *Longitude
5DEPTH, sediment/rock *DepthmGeocode
6Coral *CoralWienberg, Claudia *
7Age, relative *Age relkaWienberg, Claudia *
8Age, standard deviation *Age std dev±Wienberg, Claudia *
9Uranium 238 *238Umg/kgWienberg, Claudia *
10Uranium 238, standard deviation *238U std dev±Wienberg, Claudia *
11Thorium 232 *232Thµg/kgWienberg, Claudia *= ppb as original published
12Thorium 232, standard deviation *232Th std dev±Wienberg, Claudia *
13delta 234 Uranium *d234Uper milWienberg, Claudia *
14delta 234 Uranium, standard deviation *d234U std dev±Wienberg, Claudia *
License:
Size:
356 data points

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