Continental Oxygen Isotopic Record of the Last 170,000 Years in Jerusalem

1999 ◽  
Vol 51 (3) ◽  
pp. 317-327 ◽  
Author(s):  
Amos Frumkin ◽  
Derek C. Ford ◽  
Henry P. Schwarcz
Keyword(s):  
Mediterranean Sea ◽  
Glacial Cycle ◽  
Short Term ◽  
Last Glacial ◽  
Climatic Variations ◽  
Probable Source ◽  
Oxygen Isotopic ◽  
The Mediterranean ◽  
The Last Glacial

AbstractA long radiometrically dated oxygen isotopic record of continental climatic variations since the penultimate glaciation was obtained from a stalagmite deposited in a sealed cave in Jerusalem. This record shows that speleothems have the potential of assigning dates to long- and short-term climatic events, with possible refining of Milankovitch tuning of ice and marine records which themselves are not datable. Short-term (∼1000-yr) events are very significant in the region, reaching ∼50% of glacial/interglacial fluctuations. The Mediterranean Sea was the most probable source of local precipitation throughout the last glacial cycle.

Variations in terrigenous dilution in western Mediterranean Sea pelagic sediments in response to climate change during the last glacial cycle

2004 ◽  
Vol 211 (1-2) ◽  
pp. 21-43 ◽  
Author(s):  
B.A.A. Hoogakker ◽  
R.G. Rothwell ◽  
E.J. Rohling ◽  
M. Paterne ◽  
D.A.V. Stow ◽  
...  
Keyword(s):  
Climate Change ◽  
Mediterranean Sea ◽  
Western Mediterranean ◽  
Glacial Cycle ◽  
Last Glacial ◽  
Western Mediterranean Sea ◽  
The Last Glacial

Modeling new scenarios of ocean dynamics during deglaciation over Southern European Seas (Mediterranean and Black Seas)

2021 ◽  
Author(s):  
Gilles Ramstein ◽  
Tristan Vadsaria ◽  
Laurent Li ◽  
Jean-Claude Dutay ◽  
Sébastien Zaragosi
Keyword(s):  
Mediterranean Sea ◽  
Fresh Water ◽  
Black Sea ◽  
Ocean Dynamics ◽  
The Black Sea ◽  
Nile River ◽  
African Monsoon ◽  
Last Glacial ◽  
The Mediterranean ◽  
The Last Glacial

<p>During quaternary, periodic organic rich layers in the Mediterranean Sea marine sediments also known as sapropels, are not only driven by African monsoon modulation. Superimposed to the main pacing associated with precession cycles (about 21 ka) many sapropels are also impacted by the 100 ka periods associated with the glacial-interglacial cycles. The last occurrence (S1) at the end of the last glacial period and the Early Holocene is an appropriate illustration of this behavior. Recent studies based on long deglaciation simulations with coupled AOGCM pointed out that reaching bottom water anoxia needs a preconditioning, throughout the last deglaciation, driven by North Atlantic Ocean freshening for a few thousand years prior to S1. Here, we investigate another important source of fresh water induced by the melting of Fennoscandian ice sheets (FIS). This run-off freshened the Black Sea, the Marmara Sea and ultimately could have an impact on the stratification and the convection over the Aegean Sea. In order to tackle this issue, we used continental hydrologic perturbation scenarios to drive a high-resolution Mediterranean Sea dynamic circulation model (1/8°) that correctly captures the convection sites and their intensity. In one hand, we rely on hydrologic reconstruction of FIS melting provided by Peltier et al. (JGR, 2015) and Patton, H. et al. (QSR, 2017) in order to derive freshwater flux since the Last Glacial Maximum - that impacted the Black Sea, and likely the Eastern Mediterranean Sea. In the other hand, we build a complete transient scenario accounting for the later enhancement of the African monsoon and we increase fresh water from Nile river. Prescribing such a scenario: first a freshwater increase from FIS during the deglaciation and second a fresh water increase from Nile river, it leads to the shutdown of the Mediterranean Thermohaline Circulation. Our results are in good agreement with Aegean reconstructions (Grant et al, QSR, 2016; Soulet e al. Proc. Natl. Acad. Sci, 3013). The methodology we developed could also be applied to sapropel S5 and S10.</p>

scholarly journals Understanding past climatic and hydrological variability in the Mediterranean from Lake Prespa sediment isotope and geochemical record over the Last Glacial cycle

2013 ◽  
Vol 66 ◽  
pp. 123-136 ◽  
Author(s):  
Melanie J. Leng ◽  
Bernd Wagner ◽  
Anne Boehm ◽  
Konstantinos Panagiotopoulos ◽  
Christopher H. Vane ◽  
...  
Keyword(s):  
Glacial Cycle ◽  
Last Glacial ◽  
Lake Prespa ◽  
Hydrological Variability ◽  
The Mediterranean ◽  
The Last Glacial
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