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Climate of the Past An interactive open-access journal of the European Geosciences Union
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Preprints
https://doi.org/10.5194/cp-2019-30
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/cp-2019-30
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.

  20 Mar 2019

20 Mar 2019

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This discussion paper is a preprint. It has been under review for the journal Climate of the Past (CP). The manuscript was not accepted for further review after discussion.

Lack of marine entry into Marmara and Black Sea-lakes indicate low relative sea level during MIS 3 in the northeastern Mediterranean

Anastasia G. Yanchilina1, Celine Grall2, William B. F. Ryan2, Jerry F. McManus2, and Candace O. Major3 Anastasia G. Yanchilina et al.
  • 1Department of Earth and Planetary Sciences, Weizmann Institute of Science, Rehovot, Israel 7610001
  • 2Lamont-Doherty Earth Observatory, Columbia University, 61 Route 9W, Palisades, New York 10964
  • 3National Science Foundation, 2415 Eisenhower Ave., Alexandria, Virginia 22314

Abstract. The Marine Isotope Stage 3 (MIS 3) is considered a period of persistent and rapid climate and sea level variabilities during which eustatic sea level is observed to have varied by tens of meters. Constraints on local sea level during this time are critical for further estimates of these variabilities. We here present constraints on relative sea level in the Marmara and Black Sea regions in the northeastern Mediterranean, inferred from reconstructions of the history of the connections and disconnections (partial or total) of these seas together with the global ocean. We use a set of independent data from seismic imaging and core-analyses to infer that the Marmara and Black Seas remained connected persistent freshwater lakes that outflowed to the global ocean during the majority of MIS 3. Marine water intrusion during the early MIS-3 stage may have occurred into the Marmara Sea-Lake but not the Black Sea-Lake. This suggests that the relative sea level was near the paleo-elevation of the Bosporus sill and possibly slightly above the Dardanelles paleo-elevation, ~80 mbsl. The Eustatic sea level may have been even lower, considering the isostatic effects of the Eurasian ice sheet would have locally uplifted the topography of the northeastern Mediterrranean.

Anastasia G. Yanchilina et al.

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Anastasia G. Yanchilina et al.

Anastasia G. Yanchilina et al.

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Short summary
This paper is about regional sea level during Marine Isotope Stage 3 (MIS 3) with broader implications for eustatic sea level during MIS 3. There is no current good constraint. We provide evidence that regional sea level in the northeast Mediterranean had to remain low, below 80 mbsl from seismic and geochemical observations. This has implications for understanding eustatic sea level fluctuations during MIS 3, modelling glacio-isostatic adjustment, and ice sheet/terrestrial interactions.
This paper is about regional sea level during Marine Isotope Stage 3 (MIS 3) with broader...
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