Status: 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. Major3Anastasia G. Yanchilina et al.Anastasia G. Yanchilina1,Celine Grall2,William B. F. Ryan2,Jerry F. McManus2,and Candace O. Major3
Received: 03 Mar 2019 – Discussion started: 20 Mar 2019
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.
How to cite. Yanchilina, A. G., Grall, C., Ryan, W. B. F., McManus, J. F., and Major, C. O.: Lack of marine entry into Marmara and Black Sea-lakes indicate low relative sea level during MIS 3 in the northeastern Mediterranean, Clim. Past Discuss. [preprint], https://doi.org/10.5194/cp-2019-30, 2019.
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...