(Table 3) Barium barite and excess comparison, accumulation rates and productivity from surface sediments, supplement to: Eagle, Meagan; Paytan, Adina; Arrigo, Kevin R; van Dijken, Gert L; Murray, Richard W (2003): A comparison between excess barium and barite as indicators of carbon export. Paleoceanography, 18(1), 1021


Since Dymond et al. (1992, doi:10.1029/92PA00181) proposed the paleoproductivity algorithm based on “Bio-Ba”, which relies on a strong correlation between Ba and organic carbon fluxes in sediment traps, this proxy has been applied in many paleoproductivity studies. Barite, the main carrier of particulate barium in the water column and the phase associated with carbon export, has also been suggested as a reliable paleoproductivity proxy in some locations. We demonstrate that Ba(excess) (total barium minus the fraction associated with terrigenous material) frequently overestimates Ba(barite) (barium associated with the mineral barite), most likely due to the inclusion of barium from phases other than barite and terrigenous silicates (e.g., carbonate, organic matter, opal, Fe-Mn oxides, and hydroxides). A comparison between overlying oceanic carbon export and carbon export derived from Ba(excess) shows that the Dymond et al. (1992) algorithm frequently underestimates carbon export but is still a useful carbon export indicator if all caveats are considered before the algorithm is applied. Ba(barite) accumulation rates from a wide range of core top sediments from different oceanic settings are highly correlated to surface ocean 14C and Chlorophyll a measurements of primary production. This relationship varies by ocean basin, but with the application of the appropriate f ratio to 14C and Chlorophyll a primary production estimates, the plot of Ba(barite) accumulation and carbon export for the equatorial Pacific, Atlantic, and Southern Ocean converges to a global relationship that can be used to reconstruct paleo carbon export.

This data set gives table 3 as reported in the Erratum. Ba total and Al total analyses of TT013 samples from Schroeder et al. (1997) and Murray et al. (2000), PS samples from Nürnberg et al. (1995).

DOI https://doi.org/10.1594/PANGAEA.115069
Related Identifier https://doi.org/10.1029/2002PA000793
Related Identifier https://doi.org/10.1029/2003PA000922
Related Identifier https://doi.org/10.1029/1999PA000457
Related Identifier https://doi.org/10.1029/97PA01130
Related Identifier https://doi.org/10.1029/96PA02736
Metadata Access https://ws.pangaea.de/oai/provider?verb=GetRecord&metadataPrefix=datacite4&identifier=oai:pangaea.de:doi:10.1594/PANGAEA.115069
Creator Eagle, Meagan; Paytan, Adina; Arrigo, Kevin R; van Dijken, Gert L; Murray, Richard W
Publisher PANGAEA - Data Publisher for Earth & Environmental Science
Publication Year 2003
Rights Creative Commons Attribution 3.0 Unported; https://creativecommons.org/licenses/by/3.0/
OpenAccess true
Language English
Resource Type Supplementary Dataset; Dataset
Format text/tab-separated-values
Size 700 data points
Discipline Earth System Research
Spatial Coverage (-170.171W, -66.128S, 160.998E, 8.925N); Agulhas Ridge; South Atlantic; Equatorial Pacific; South Pacific Ocean
Temporal Coverage Begin 1973-02-15T00:00:00Z
Temporal Coverage End 1996-02-21T00:00:00Z