Orbital-resolution Pliocene-Pleistocene simulations of CO2, sea level, global temperature and benthic δ¹⁸O, and d11B-based proxy-CO2 data ...

• Main Authors: Stap, Lennert Bastiaan, de Boer, Bas, Ziegler, Martin, Bintanja, Richard, Lourens, Lucas Joost, van de Wal, Roderik S W
• Format: Article in Journal/Newspaper
• Language: English
• Published: PANGAEA 2016
• Subjects: Ocean Drilling Program ODP; Antarctic; Antarc*; ice core; Ice Sheet
• Online Access: https://dx.doi.org/10.1594/pangaea.859092; https://doi.pangaea.de/10.1594/PANGAEA.859092

During the past five million yrs, benthic d18O records indicate a large range of climates, from warmer than today during the Pliocene Warm Period to considerably colder during glacials. Antarctic ice cores have revealed Pleistocene glacial-interglacial CO2 variability of 60-100 ppm, while sea level fluctuations of typically 125 m are documented by proxy data. However, in the pre-ice core period, CO2 and sea level proxy data are scarce and there is disagreement between different proxies and different records of the same proxy. This hampers comprehensive understanding of the long-term relations between CO2, sea level and climate. Here, we drive a coupled climate-ice sheet model over the past five million years, inversely forced by a stacked benthic d18O record. We obtain continuous simulations of benthic d18O, sea level and CO2 that are mutually consistent. Our model shows CO2 concentrations of 300 to 470 ppm during the Early Pliocene. Furthermore, we simulate strong CO2 variability during the Pliocene and ... : Supplement to: Stap, Lennert Bastiaan; de Boer, Bas; Ziegler, Martin; Bintanja, Richard; Lourens, Lucas Joost; van de Wal, Roderik S W (2016): CO2 over the past 5 million years: Continuous simulation and new d11B-based proxy data. Earth and Planetary Science Letters, 439, 1-10 ...