Journal metrics

Journal metrics

  • IF value: 3.174 IF 3.174
  • IF 5-year value: 3.841 IF 5-year 3.841
  • CiteScore value: 3.48 CiteScore 3.48
  • SNIP value: 1.078 SNIP 1.078
  • SJR value: 1.981 SJR 1.981
  • IPP value: 3.38 IPP 3.38
  • h5-index value: 42 h5-index 42
  • Scimago H index value: 58 Scimago H index 58
Discussion papers | Copyright
https://doi.org/10.5194/cp-2018-75
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.

Research article 18 Jul 2018

Research article | 18 Jul 2018

Review status
This discussion paper is a preprint. It is a manuscript under review for the journal Climate of the Past (CP).

Extreme lowering of deglacial seawater radiocarbon content is recorded by both epifaunal and infaunal benthic foraminifera

Patrick A. Rafter1, Juan-Carlos Herguera2, and John R. Southon1 Patrick A. Rafter et al.
  • 1Department of Earth System Science, University of California, Irvine, CA, USA
  • 2Centro de Investigación Cientifica y Educación Superior de Ensenada, Mexico

Abstract. For over a decade, oceanographers have debated the interpretation and reliability of sediment microfossil records indicating extremely low seawater radiocarbon (14C) during the last deglaciation-observations that suggest a major disruption in marine carbon cycling coincident with rising atmospheric CO2 concentrations. Possible flaws in these records include poor age model controls, utilization of mixed, infaunal foraminifera species possibly influenced by changing porewater chemistry, and bioturbation. We have addressed these concerns using a glacial-interglacial record of epifaunal benthic foraminifera 14C on an ideal sedimentary age model (wood calibrated to atmosphere 14C). Our results affirm – with important caveats – the fidelity of these microfossil archives and confirm previous observations of highly depleted seawater 14C at intermediate depths in the deglacial northeast Pacific.

Download & links
Patrick A. Rafter et al.
Interactive discussion
Status: open (until 21 Sep 2018)
Status: open (until 21 Sep 2018)
AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
[Subscribe to comment alert] Printer-friendly Version - Printer-friendly version Supplement - Supplement
Patrick A. Rafter et al.
Patrick A. Rafter et al.
Viewed
Total article views: 534 (including HTML, PDF, and XML)
HTML PDF XML Total BibTeX EndNote
429 97 8 534 7 7
  • HTML: 429
  • PDF: 97
  • XML: 8
  • Total: 534
  • BibTeX: 7
  • EndNote: 7
Views and downloads (calculated since 18 Jul 2018)
Cumulative views and downloads (calculated since 18 Jul 2018)
Viewed (geographical distribution)
Total article views: 534 (including HTML, PDF, and XML) Thereof 534 with geography defined and 0 with unknown origin.
Country # Views %
  • 1
1
 
 
 
 
Cited
Saved
No saved metrics found.
Discussed
No discussed metrics found.
Latest update: 20 Aug 2018
Publications Copernicus
Download
Short summary
Carbon’s radioactive isotope ("radiocarbon") is a useful tool for oceanographers investigating carbon cycling in the modern ocean and ice age oceans (using foraminifera microfossils). Here we used sediment cores with excellent age constraints and anomalously abundant foraminifera microfossils to examine the inter-species radiocarbon differences. All species demonstrate the same extreme radiocarbon depletion and we argue these observations represent important changes in seawater carbon chemistry.
Carbon’s radioactive isotope ("radiocarbon") is a useful tool for oceanographers investigating...
Citation
Share