Accumulation rates of bulk sediment and opal in surface sediments of the South Atlantic, supplement to: Geibert, Walter; Rutgers van der Loeff, Michiel M; Usbeck, Regina; Gersonde, Rainer; Kuhn, Gerhard; Seeberg-Elverfeldt, Jens (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

DOI

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/m2 yr (Eastern Weddell Gyre) to 15.8 g/m2 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.

Identifier
DOI https://doi.org/10.1594/PANGAEA.230042
Related Identifier https://doi.org/10.1029/2005GB002465
Metadata Access https://ws.pangaea.de/oai/provider?verb=GetRecord&metadataPrefix=datacite4&identifier=oai:pangaea.de:doi:10.1594/PANGAEA.230042
Provenance
Creator Geibert, Walter; Rutgers van der Loeff, Michiel M; Usbeck, Regina; Gersonde, Rainer; Kuhn, Gerhard; Seeberg-Elverfeldt, Jens
Publisher PANGAEA - Data Publisher for Earth & Environmental Science
Publication Year 2005
Funding Reference German Science Foundation
Rights Creative Commons Attribution 3.0 Unported
OpenAccess true
Representation
Language English
Resource Type Supplementary Dataset
Format text/tab-separated-values
Size 1759 data points
Discipline Earth System Research
Spatial Coverage (-121.247W, -78.245S, 38.827E, -43.187N); Atka Bay; Barents Sea; Kapp Norvegia; Camp Norway; Vestkapp; Lyddan Island; Filchner Trough; Weddell Sea; Eastern Weddell Sea, Southern Ocean; South Orkney; Maud Rise; Wegener Canyon; Halley Bay; Agulhas Basin; Meteor Rise; Shona Ridge; Atlantic Ridge; South Sandwich Basin; Lazarev Sea; South Atlantic Ocean; South Atlantic; Riiser-Larsen Sea; Cosmonaut Sea; Indian-Antarctic Ridge; Southeast Pacific; Indian Ocean
Temporal Coverage Begin 1987-01-23T21:39:00Z
Temporal Coverage End 2003-01-15T06:08:00Z