Deglacial carbon cycle changes observed in a compilation of 127 benthic δ¹³C time series (20-6 ka) ...

• Main Authors: Peterson, Carlye D, Lisiecki, Lorraine E
• Format: Article in Journal/Newspaper
• Language: English
• Published: PANGAEA 2018
• Subjects: ice core
• Online Access: https://dx.doi.org/10.1594/pangaea.893008; https://doi.pangaea.de/10.1594/PANGAEA.893008

We present a compilation of 127 time series δ¹³C records from Cibicides wuellerstorfi spanning the last deglaciation (20-6 ka) which is well-suited for reconstructing large-scale carbon cycle changes, especially for comparison with isotope-enabled carbon cycle models. The age models for the δ¹³C records are derived from regional planktic radiocarbon compilations (Stern and Lisiecki, 2014). The δ¹³C records were stacked in nine different regions and then combined using volume-weighted averages to create intermediate, deep, and global δ¹³C stacks. These benthic δ¹³C stacks are used to reconstruct changes in the size of the terrestrial biosphere and deep ocean carbon storage. The timing of change in global mean δ¹³C is interpreted to indicate terrestrial biosphere expansion from 19-6 ka. The δ¹³C gradient between the intermediate and deep ocean, which we interpret as a proxy for deep ocean carbon storage, matches the pattern of atmospheric CO₂ change observed in ice core records. The presence of signals ... : Supplement to: Peterson, Carlye D; Lisiecki, Lorraine E (2018): Deglacial carbon cycle changes observed in a compilation of 127 benthic δ¹³C time series (20 - 6 ka). Climate of the Past Discussions, 14, 1229-1252 ...