Dansgaard–Oeschger-like events of the penultimate climate cycle: the loess point of view
reliable data, however, the spatial coherence of corresponding variability
during the penultimate cycle is less clear. New investigations of European
loess records from Marine Isotope Stage (MIS) 6 reveal the occurrence of alternating loess intervals and paleosols (incipient soil horizons), similar to those from the last climatic cycle. These paleosols are correlated, based on their stratigraphical position and numbers as well as available optically stimulated luminescence (OSL) dates, with interstadials described in various Northern Hemisphere records and in GLt_syn, the synthetic 800 kyr record of Greenland ice core δ18O. Therefore, referring to the interstadials described in the record of the last climate cycle in European loess sequences, the four MIS 6 interstadials can confidently be interpreted as DO-like events of the penultimate climate cycle. Six more interstadials are identified from proxy measurements performed on the same interval, leading to a total of 10 interstadials with a DO-like event status. The statistical similarity between the millennial-scale loess–paleosol oscillations during the last and penultimate climate cycle provides direct empirical evidence that the cycles of the penultimate cycle are indeed of the same nature as the DO cycles originally discovered for the last glacial cycle. Our results thus imply that their underlying cause and global imprint were characteristic of at least the last two climate cycles.
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Stephen Barker, Gregor Knorr, R. Lawrence Edwards et al.
Hai Cheng, R. Lawrence Edwards, Yongjin Wang et al.
W. Dansgaard, S. J. Johnsen, H. B. Clausen et al.
David A. Hodell, James E. T. Channell, Jason H. Curtis et al.
Lorraine E. Lisiecki, Maureen E. Raymo
Belen Martrat, Joan O. Grimalt, Constancia Lopez-Martinez et al.
Belen Martrat, Joan O. Grimalt, Nicholas J. Shackleton et al.
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- Published
- Apr 09, 2020
- Vol/Issue
- 16(2)
- Pages
- 713-727
- License
- View
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