Abrupt intrinsic and extrinsic responses of southwestern Iberian vegetation to millennial-scale variability over the past 28 ka ...

• Main Authors: Cutmore, Anna, Ausín, Blanca, Maslin, Mark, Eglinton, Timothy I., Hodell, David, Muschitiello, Francesco, Menviel, Laurie, Haghipour, Negar, Martrat, Belen, Margari, Vasiliki, Tzedakis, Polychronis C.
• Format: Article in Journal/Newspaper
• Language: English
• Published: ETH Zurich 2022
• Subjects: abrupt climate change; Holocene; Marine Isotope Stage 2; pollen; southwest Iberia; Planktonic foraminifera
• Online Access: https://dx.doi.org/10.3929/ethz-b-000517079; http://hdl.handle.net/20.500.11850/517079

We present new high-resolution pollen records combined with palaeoceanographic proxies from the same samples in deep-sea cores SHAK06-5K and MD01-2444 on the southwestern Iberian Margin, documenting regional vegetation responses to orbital and millennial-scale climate changes over the last 28 ka. The chronology of these records is based on high-resolution radiocarbon dates of monospecific samples of the planktonic foraminifera Globigerina bulloides, measured from SHAK06-5K and MD01-2444 and aligned using an automated stratigraphical alignment method. Changes in temperate and steppe vegetation during Marine Isotope Stage 2 are closely coupled with sea surface temperature (SST) and global ice-volume changes. The peak expansion of thermophilous woodland between similar to 10.1 and 8.4 cal ka BP lags behind the boreal summer insolation maximum by similar to 2 ka, possibly arising from residual high-latitude ice-sheets into the Holocene. Rapid changes in pollen percentages are coeval with abrupt transitions in ... : Journal of Quaternary Science, 37 (3) ...