Climate proxies of sea-surface temperature, carbon isotopes, and dust flux for the last 800-kyr and the Mid-Brunhes Transition ...

• Main Authors: Barth, Aaron M, Clark, Peter U, Bill, Nicholas S, He, Feng, Pisias, Nicklas G
• Format: Article in Journal/Newspaper
• Language: English
• Published: PANGAEA 2018
• Subjects: ice core
• Online Access: https://dx.doi.org/10.1594/pangaea.894898; https://doi.pangaea.de/10.1594/PANGAEA.894898

The Mid-Brunhes Transition (MBT) began ∼430ka with an increase in the amplitude of the 100-kyr climate cycles of the past 800,000 years. The MBT has been identified in ice-core records, which indicate interglaciations became warmer with higher atmospheric CO2 levels after the MBT, and benthic oxygen isotope (δ18O) records, which suggest that post-MBT interglaciations had higher sea levels than pre-MBT interglaciations. It remains unclear, however, whether the MBT was a globally synchronous phenomenon that included other components of the climate system. Here we further characterize changes in the climate system across the MBT through statistical analyses of ice-core and δ18O records as well as sea-surface temperature, benthic carbon isotope, and dust accumulation records. Our results demonstrate that the MBT was a global event with a significant increase in climate variance in most components of the climate system assessed here. However, our results indicate that the onset of high-amplitude variability in ... : Supplement to: Barth, Aaron M; Clark, Peter U; Bill, Nicholas S; He, Feng; Pisias, Nicklas G (2018): Climate evolution across the Mid-Brunhes Transition. Climate of the Past, 14(12), 2071-2087 ...