The University of Southampton
University of Southampton Institutional Repository

Hydraulic calculations of postglacial connections between the Mediterranean and the Black Sea

Record type: Article

A series of simple hydraulic calculations has been performed to examine some of the questions associated with the reconnection of the Black Sea to the Mediterranean through the Turkish Strait System during the Holocene. Ryan et al.'s catastrophic flood scenario, whereby the erosive power of the marine in-fluxes, initiated after eustatic sea level reached the sill depth, opened up the Bosphorus, allowing saline water to pour into the Black Sea and filling it on a short time scale, is examined. The calculations show that although it might be possible to fill the palaeo-Black Sea within the order of a decade, a 1-2 year filling time scale is not physically possible. A hydraulic model is also used to examine the more traditional connection hypothesis of (near-)continuous freshwater outflow from the Black Sea, with a slowly increasing saline inflow from the Mediterranean beginning around 8-9 kyr BP. The model considers two forms for the structure of the Bosphorus: a shallow sill as seen today and a deep sill associated with no sediments filling the 100 m gorge above the bedrock in the strait. Sensitivity experiments with the hydraulic model show what possible strait geometric configurations may lead to the Black Sea reaching its present-day salinity of 18 psu. Salinity transients within the Black Sea are shown as a function of time, providing for values that can be validated against estimates from cores. To consider a deep, non-sediment-filled Bosphorus (100 m deep), the entry of Mediterranean water into the Sea of Marmara after 12.0 kyr BP is examined. A rapid entry of marine water into the Sea of Marmara is only consistent with small freshwater fluxes flowing through the Turkish Strait System, smaller than those of the present day by a factor of at least 4. Such a small freshwater flux would lead to the salinification of the Black Sea being complete by an early date of 10.2-9.6 kyr BP. Thus the possibility of a deep Bosphorus sill should be discounted.

Full text not available from this repository.

Citation

Myers, P.G., Wielki, C., Goldstein, S.B. and Rohling, E.J. (2003) Hydraulic calculations of postglacial connections between the Mediterranean and the Black Sea Marine Geology, 201, (4), pp. 253-267. (doi:10.1016/S0025-3227(03)00225-1).

More information

Published date: 2003
Keywords: Black Sea, Bosphorus, Sea of Marmara, Mediterranean, Palaeoceanography, Hydraulic modelling

Identifiers

Local EPrints ID: 2086
URI: http://eprints.soton.ac.uk/id/eprint/2086
ISSN: 0025-3227
PURE UUID: 4ac260fd-e60e-4d16-81ee-13a981a13640
ORCID for E.J. Rohling: ORCID iD orcid.org/0000-0001-5349-2158

Catalogue record

Date deposited: 11 May 2004
Last modified: 17 Jul 2017 17:16

Export record

Altmetrics

Contributors

Author: P.G. Myers
Author: C. Wielki
Author: S.B. Goldstein
Author: E.J. Rohling ORCID iD

University divisions


Download statistics

Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.

View more statistics

Atom RSS 1.0 RSS 2.0

Contact ePrints Soton: eprints@soton.ac.uk

ePrints Soton supports OAI 2.0 with a base URL of http://eprints.soton.ac.uk/cgi/oai2

This repository has been built using EPrints software, developed at the University of Southampton, but available to everyone to use.

We use cookies to ensure that we give you the best experience on our website. If you continue without changing your settings, we will assume that you are happy to receive cookies on the University of Southampton website.

×