Biotic responses to rapid warming about 14,685 yr BP: Introduction to a case study at Gerzensee (Switzerland) ...
The late-glacial climatic warming indicated in the Greenland ice-core record about 14,685 years before 1950 AD belongs to a type of very rapid high-amplitude warming similar the onsets of Dansgaard-Oeschger events during marine isotope stage 3 (MIS 3). In order to estimate the nature and rates of ch...
| Main Authors: | , , |
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| Format: | Text |
| Language: | English |
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Elsevier
2013
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| Subjects: | |
| Online Access: | https://dx.doi.org/10.7892/boris.106882 https://boris.unibe.ch/106882/ |
| Summary: | The late-glacial climatic warming indicated in the Greenland ice-core record about 14,685 years before 1950 AD belongs to a type of very rapid high-amplitude warming similar the onsets of Dansgaard-Oeschger events during marine isotope stage 3 (MIS 3). In order to estimate the nature and rates of change of biotic responses to such a major climatic shift we need a reliable time scale as well as climatic indicators independent of the biota. Both are provided by a high-resolution oxygen-isotope record from precipitated carbonates of lake marl in Gerzensee, Switzerland (van Raden et al., 2013-this issue). On the basis of the assumption of synchronous climatic changes between Greenland and Gerzensee, the close correlation of the oxygen-isotope changes at the two sites allows the use of the NGRIP GICC05-timescale at Gerzensee (with the zero point at 1950 AD to maintain comparability with the numerous radiocarbon dates in Europe). The delta O-18-record measured in precipitated carbonates is checked and refined by ... |
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