Abrupt intrinsic and extrinsic responses of southwestern Iberian vegetation to millennial-scale variability over the past 28 ka ...
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. Th...
Main Authors: | , , , , , , , , , , |
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Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
ETH Zurich
2022
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Subjects: | |
Online Access: | https://dx.doi.org/10.3929/ethz-b-000517079 http://hdl.handle.net/20.500.11850/517079 |
Summary: | 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) ... |
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