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Geibert, Walter; Rutgers van der Loeff, Michiel M; Usbeck, Regina; Gersonde, Rainer; Kuhn, Gerhard; Seeberg-Elverfeldt, Jens (2005): Accumulation rates of bulk sediment and opal in surface sediments of the South Atlantic. PANGAEA,, Supplement to: Geibert, W et al. (2005): Quantifying the opal belt in the Atlantic and southeast Pacific sector of the Southern Ocean by means of 230Th normalization. Global Biogeochemical Cycles, 19(4), GB4001,

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A set of 114 samples from the sediment surface of the Atlantic, eastern Pacific and western Indian sectors of the Southern Ocean has been analyzed for 230Th and biogenic silica. Maps of opal content, Th-normalized mass flux, and Th-normalized biogenic opal flux into the sediment have been derived. Significant differences in sedimentation patterns between the regions can be detected. The mean bulk vertical fluxes integrated into the sediment in the open Southern Ocean are found in a narrow range from 2.9 g/m**2 yr (Eastern Weddell Gyre) to 15.8 g/m**2 yr (Indian sector), setting upper and lower limits to the vertically received fraction of open ocean sediments. The silica flux to sediments of the Atlantic sector of the Southern Ocean is found to be 4.2 ± 1.4 * 10**11 mol/yr, just one half of the last estimate. This adjustment represents 6% of the output term in the global marine silica budget.
German Science Foundation (DFG), grant/award no. 5472008: Priority Programme 1158 Antarctic Research with Comparable Investigations in Arctic Sea Ice Areas
Median Latitude: -62.291838 * Median Longitude: -26.850695 * South-bound Latitude: -78.245160 * West-bound Longitude: -121.247000 * North-bound Latitude: -43.186667 * East-bound Longitude: 38.826667
Date/Time Start: 1987-01-23T21:39:00 * Date/Time End: 2003-01-15T06:08:00
Minimum DEPTH, sediment/rock: m * Maximum DEPTH, sediment/rock: m
PS58/251-1 * Latitude: -68.625000 * Longitude: -97.122000 * Date/Time Start: 2001-03-08T04:26:00 * Date/Time End: 2001-03-08T05:08:00 * Elevation: -2819.0 m * Recovery: 0.18 m * Location: Southeast Pacific * Campaign: ANT-XVIII/5a (PS58) * Basis: Polarstern * Method/Device: MultiCorer (MUC)
PS58/252-1 * Latitude: -68.187000 * Longitude: -97.155000 * Date/Time Start: 2001-03-08T10:51:00 * Date/Time End: 2001-03-08T11:52:00 * Elevation: -4507.0 m * Recovery: 0.38 m * Location: Southeast Pacific * Campaign: ANT-XVIII/5a (PS58) * Basis: Polarstern * Method/Device: MultiCorer (MUC)
PS58/253-2 * Latitude: -69.308000 * Longitude: -107.562000 * Date/Time Start: 2001-03-09T17:46:00 * Date/Time End: 2001-03-09T18:35:00 * Elevation: -3721.0 m * Recovery: 0.42 m * Location: Southeast Pacific * Campaign: ANT-XVIII/5a (PS58) * Basis: Polarstern * Method/Device: MultiCorer (MUC)
#NameShort NameUnitPrincipal InvestigatorMethod/DeviceComment
1Event labelEvent
2Latitude of eventLatitude
3Longitude of eventLongitude
4Elevation of eventElevationm
5DEPTH, sediment/rockDepthmGeocode
6Area/localityAreaGeibert, Walteras defined in Geibert et al. 2005
7Uranium-234234Udpm/gGeibert, WalterMeasured
8Uranium-234234Udpm/gGeibert, WalterCalculatedfrom 232Thorium according to Walter et al. 1997
9Uranium-234, standard deviation234U std dev±Geibert, WalterMeasured
10Thorium-230 excess230Th xsdpm/gGeibert, Walter
11Thorium-230 excess, standard deviation230Th xs std dev±Geibert, Walter
12Reference/sourceReferenceGeibert, Walterfor 230Thorium excess
13CommentCommentGeibert, Walter
14Method commentMethod commGeibert, WalterMethod for BSi
15Opal, biogenic silicabSiO2%Geibert, Walter
16Reference of dataRef dataGeibert, Walterfor BSi data
17Bulk sediment, fluxBulk fluxg/m2/aGeibert, Walter
18Biogenic silica, fluxbSiO2 fluxmmol/m2/aGeibert, Walter
1759 data points

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