Paleoclimate Dynamics in the Eastern Mediterranean
Summary
The Eastern Mediterranean occupies a climatic crossroads where Atlantic, continental and Indian monsoon systems converge. Over glacial–interglacial cycles, shifts in the Atlantic Meridional Overturning Circulation, solar forcing and regional monsoon strength have driven temperature and precipitation variability. Key archives include speleothems, lacustrine sediments, micro-facies records and pollen sequences. These proxies record sea-surface temperature shifts, atmospheric circulation changes and lake-level fluctuations that mirror North Atlantic stadials and interstadials, sapropel deposition in the Mediterranean, and monsoon modulations. Holocene records reveal millennial-scale aridity events linked to solar minima, while late Pleistocene deposits capture dramatic lake-level falls and rises in lake precursors of the Dead Sea. These reconstructions inform on water-resource resilience, past human migrations and ecosystem responses to hydroclimatic stress across the Levantine corridor.
Research from Nature Portfolio
Analyses of a last interglacial speleothem from an Israeli cave have reconstructed sea-surface temperature and rainfall source changes during a weakened Atlantic overturning circulation. Organic temperature proxies show a progressive cooling of several degrees over a few thousand years, while fluid-inclusion water-isotope data indicate a shift towards zonal Mediterranean airflow. The combined signals demonstrate how remote North Atlantic circulation perturbations propagated into Eastern Mediterranean hydroclimate, and raise questions about ongoing trends in rainfall source isotopic composition under modern AMOC variability.
Paleoclimate Dynamics in the Eastern Mediterranean publication trend
The graph below shows the total number of articles in paleoclimate dynamics in the eastern mediterranean across all publications each year (not limited to Nature Index journals).
Technical terms
Speleothem: cave mineral deposit (stalagmite or stalactite) that retains geochemical proxies of past temperature and rainfall. TEX86: lipid-based organic proxy used to estimate past sea-surface temperatures. d-excess: deuterium-excess parameter indicating moisture source and evaporation history. Marine Isotope Stage (MIS): global climate intervals defined by oxygen isotope ratios in marine sediments. Micro-facies: fine-scale sediment layers analysed to infer changes in depositional environment and lake level. Sapropel: organic-rich sediment layer in the Mediterranean indicating periods of enhanced freshwater input and anoxia.
References
- Weakened AMOC related to cooling and atmospheric circulation shifts in the last interglacial Eastern Mediterranean. Nature Communications (2023).
- A new Dead Sea pollen record reveals the last glacial paleoenvironment of the southern Levant. Quaternary Science Reviews (2019).
- Hydroclimatic variability in the Levant during the early last glacial (∼ 117–75 ka) derived from micro-facies analyses of deep Dead Sea sediments. Climate of the Past (2016).
- Medieval Climate in the Eastern Mediterranean: Instability and Evidence of Solar Forcing. Atmosphere (2019).
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