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BlackPearl: The Black Sea Palaeoclimate and Environment during the penultimate glacial - reconstructions from lacustrine sediments

The Black Sea reacts very sensitive to global climate fluctuations occurring on glacial-interglacial but also on millennial timescales. Recent studies have shown that the so-called Dansgaard-Oeschger (DO) climate variability clearly affected the regional climate and environmental conditions in the formerly Black Sea Lake during Marine Isotope Stages (MIS) 2-4 (20-64 ka BP), thus reflecting a close atmospheric teleconnection between the North Atlantic and Eurasia. Although DO-like climate variability may have also prevailed during the penultimate glacial (i.e. MIS 6; 130-180 ka BP), continental evidence including quantitative temperature reconstructions is missing to approve a similar northern-hemispheric teleconnection as during the last glacial (MIS 2-4). In frame of the RV Maria S. Merian cruise MSM 33 in 2013, unique sediment cores were retrieved from the SE Black Sea, which extend back up to ca. 180 ka BP thus covering the entire MIS 6. This project aims to reconstruct for the first time and at high-resolution the palaeoclimate and environmental evolution in the formerly isolated Black Sea Lake during MIS 6 by using a multi-proxy approach comprising e.g. organic biomarkers, ostracod geochemistry, and major and trace element geochemistry. 

Publikationen

  • Wegwerth, A., Dellwig, O., Wulf, S., Plessen, B., Kleinhanns, I.C., Nowaczyk, N.R., Jiabo, L., Arz, H.W. (2019). Major hydrological shifts in the Black Sea “Lake” in response to ice sheet collapses during MIS 6 (130-184 ka BP). Quat. sci. rev. 219: 126-144, https://doi.org/10.1016/j.quascirev.2019.07.008
  • Liu, J., Nowaczyk, N., Frank, U., Arz, H. (2019). Geomagnetic paleosecular variation record spanning from 40 to 20 ka – implications for the Mono Lake excursion from Black Sea sediments  . Earth planet. sci. lett. 509: 114-124, https://doi.org/10.1016/j.epsl.2018.12.029
  • Nowaczyk, N. R., L. Jiabo, U. Frank and H. W. Arz (2018). A high-resolution paleosecular variation record from Black Sea sediments indicating fast directional changes associated with low field intensities during marine isotope stage (MIS) 4. Earth Planet. Sci. Lett. 484: 15-29, doi: 10.1016/j.epsl.2017.12.009
  • Jiabo, L., N. R. Nowaczyk, U. Frank and H. W. Arz (2018). A 20-15 ka high-resolution paleomagnetic secular variation record from Black Sea sediments - no evidence for the ‘Hilina Pali excursion’? Earth Planet. Sci. Lett. 492: 174-185, doi: 10.1016/j.epsl.2018.04.014