Articles | Volume 13, issue 2
Clim. Past, 13, 149–170, 2017
Clim. Past, 13, 149–170, 2017

Research article 24 Feb 2017

Research article | 24 Feb 2017

A record of Neogene seawater δ11B reconstructed from paired δ11B analyses on benthic and planktic foraminifera

Rosanna Greenop et al.

Data sets

Ocean Data View R. Schlitzer

Planktic and benthic boron and carbon isotopes from ODP sites 121-758 R. Greenop, M. P. Hain, S. M. Sosdian, K. I. C. Oliver, P. Goodwin, T. B. Chalk, C. H. Lear, P. A. Wilson, and G. L. Foster

Short summary
Understanding the boron isotopic composition of seawater (δ11Bsw) is key to calculating absolute estimates of CO2 using the boron isotope pH proxy. Here we use the boron isotope gradient, along with an estimate of pH gradient, between the surface and deep ocean to show that the δ11Bsw varies by ~ 2 ‰ over the past 23 million years. This new record has implications for both δ11Bsw and CO2 records and understanding changes in the ocean isotope composition of a number of ions through time.