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Combining orbital tuning and direct dating approaches to age-depth model development for Chew Bahir, Ethiopia

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dc.contributor.author Trauth, Martin H
dc.contributor.author Asrat, Asfawossen
dc.contributor.author Fischer, Markus L
dc.contributor.author Foerster, Verena
dc.contributor.author Kaboth-Bahr, Stefanie
dc.contributor.author Lamb, Henry F
dc.contributor.author Marwan, Norbert
dc.contributor.author Roberts, Helen M
dc.contributor.author Schaebitz, Frank
dc.date.accessioned 2025-11-18T13:41:36Z
dc.date.available 2025-11-18T13:41:36Z
dc.date.issued 2024-09
dc.identifier.citation Trauth, M. H., Asrat, A., Fischer, M. L., Foerster, V., Kaboth-Bahr, S., Lamb, H. F., Marwan, N., Roberts, H. M., & Schaebitz, F. (2024). Combining orbital tuning and direct dating approaches to age-depth model development for Chew Bahir, Ethiopia. Quaternary Science Advances, 15, Article 100208. https://doi.org/10.1016/j.qsa.2024.100208 en_US
dc.identifier.issn 2666-0334
dc.identifier.uri https://repository.biust.ac.bw/handle/123456789/701
dc.description.abstract The directly dated RRMarch2021 age model (Roberts et al., 2021) for the ∼293 m long composite core from Chew Bahir, southern Ethiopia, has provided a valuable chronology for long-term climate changes in northeastern Africa. However, the age model has limitations on shorter time scales (less than 1–2 precession cycles), especially in the time range <20 kyr BP (kiloyears before present or thousand years before 1950) and between ∼155 and 428 kyr BP. To address those constraints we developed a partially orbitally tuned age model. A comparison with the ODP Site 967 record of the wetness index from the eastern Mediterranean, 3300 km away but connected to the Ethiopian plateau via the River Nile, suggests that the partially orbitally tuned age model offers some advantages compared to the exclusively directly dated age model, with the limitation of the reduced significance of (cross) spectral analysis results of tuned age models in cause-effect studies. The availability of this more detailed age model is a prerequisite for further detailed spatiotemporal correlations of climate variability and its potential impact on the exchange of different populations of Homo sapiens in the region. en_US
dc.language.iso en en_US
dc.publisher Elsevier Ltd en_US
dc.subject Orbital tuning en_US
dc.subject Climate changes en_US
dc.subject Age-depth model en_US
dc.subject Ethiopia en_US
dc.subject Earth sciences en_US
dc.title Combining orbital tuning and direct dating approaches to age-depth model development for Chew Bahir, Ethiopia en_US
dc.description.level phd en_US
dc.description.accessibility unrestricted en_US
dc.description.department ees en_US


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