Preprints
https://doi.org/10.5194/cpd-9-4425-2013
https://doi.org/10.5194/cpd-9-4425-2013
06 Aug 2013
 | 06 Aug 2013
Status: this preprint has been withdrawn by the authors.

The B/Ca proxy for past seawater carbonate chemistry reconstructions-laser ablation based calibrations for C. mundulus, C. wuellerstorfi and its morphotype C. cf. wuellerstorfi

F. Kersten, R. Tiedemann, J. Fietzke, and M. Frische

Abstract. B/Ca ratios in Cibicides mundulus and Cibicides wuellerstorfi have been shown to correlate with the degree of calcite saturation in seawater (Δ[CO32−]). In the South Pacific, a region of high importance in the global carbon cycle, these species are not continuously present in down-core records. Small numbers of epibenthic foraminifera in samples present an additional challenge, which can be overcome by using laser ablation-inductively coupled-mass spectrometry (LA-ICP-MS). We present a laser ablation based core-top calibration for Cibicides cf. wuellerstorfi, a C. wuellerstorfi morphotype that is abundant in the South Pacific and extend the existing global core top calibration for C. mundulus and C. wuellerstorfi to this region. B/Ca in C. cf. wuellerstorfi are linearly correlated with Δ[CO32−] and possibly display a higher sensitivity to calcite saturation changes than C. wuellerstorfi. Trace element profiles through C. wuellerstorfi and C. mundulus reveal an intra-shell B/Ca variation of ±36% around the mean shell value. Mg/Ca and B/Ca display opposite trends along the shell. Both phenomena likely result from ontogenetic effects. Intra-shell variability equals intra-sample variability, mean sample B/Ca values can thus be reliably calculated from averaged spot results of single specimen. In the global B/Ca–Δ[CO32−] range, we observe an inverse relationship between water mass age and Δ[CO32−].

This preprint has been withdrawn.

Publisher's note: Copernicus Publications remains neutral with regard to jurisdictional claims made in the text, published maps, institutional affiliations, or any other geographical representation in this preprint. The responsibility to include appropriate place names lies with the authors.
F. Kersten, R. Tiedemann, J. Fietzke, and M. Frische

Interactive discussion

Status: closed
Status: closed
AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
Printer-friendly Version - Printer-friendly version Supplement - Supplement

Interactive discussion

Status: closed
Status: closed
AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
Printer-friendly Version - Printer-friendly version Supplement - Supplement
F. Kersten, R. Tiedemann, J. Fietzke, and M. Frische
F. Kersten, R. Tiedemann, J. Fietzke, and M. Frische

Viewed

Total article views: 2,518 (including HTML, PDF, and XML)
HTML PDF XML Total BibTeX EndNote
1,294 1,092 132 2,518 87 109
  • HTML: 1,294
  • PDF: 1,092
  • XML: 132
  • Total: 2,518
  • BibTeX: 87
  • EndNote: 109
Views and downloads (calculated since 06 Aug 2013)
Cumulative views and downloads (calculated since 06 Aug 2013)

Saved

Latest update: 07 Dec 2024
Download

This preprint has been withdrawn.