The salt core was drilled in 2010 and is now receiving renewed, deeper scrutiny. During interstadial periods the Mideast becomes drier, so much so that inflows of fresh water into the Dead Sea largely stop. We’re not that dry yet, but human use of the Jordan River has effectively accomplished the same thing.
Jordan is developing the Disi aquifer and there is a Red to Dead canal planned. The Saudis have long tapped that water for local agriculture in a foolhardy bid for food security that runs counter to the natural resources they have at their command. Jordan is engaged in a rear guard action for land that will inevitably become desiccated.
This triptych gives as sense of the progression of events in the Dead Sea. The south of the sea is shallow and has been steadily overtaken by human construction. Current practices involve the annual removal of two million tons of potash (potassium chloride) and other salts. You should recognize potash as a precursor for one of the three key plant fertilizers, potassium. It is the least concern of the three in terms of being a Liebig Minimum.
Bodies of water in the area drain and fill naturally as a consequence of Earth’s glacial cycles. There is a somewhat controversial theory, the Black Sea Deluge Hypothesis, that is thought to be an explanation of the origin of various great flood myths in the region.
The Mediterranean Sea has experienced similar events – the Messinian Salinity Crisis and the Zanclean Flood that restored the sea to its current condition. There are cores from both the Black and Mediterranean seas, but they do not receive the same level of attention that ice cores do.
Four and a half years ago I published Why Gaza Is Screwed, a review of the water supply issues faced there. This is a ticking bomb for foreign policy, a pool of 1.6 million climate refugees just waiting to happen. The entire arc from West Africa to the Indus river valley faces this problem.
North of the Dead Sea is the Sea of Galilee, home to the Ohalo archeological site, which was occupied 8,000 years before North America’s Blackwater Draw. Humans hunted, gathered, and apparently performed early experiments with agriculture, inhabiting the site for a few generation before a fire of unknown origin leveled the simple huts. This site was revealed thanks to an epic drought in the late 20th century.
The Denisovans and Neanderthals were already gone except for their imprint on our genetics when that site was inhabited. Humans are now so pervasive and mobile that it will be difficult to track anything based on genetics, but the Anthropocene is going to feature a massive cull of our species. What comes next? Maybe homo futurae, two thirds of our average height today, so they’ll tolerate the heat, digging into our species’ massive middens a hundred thousand years from now, wondering why we weren’t better at understanding our place in the web of life.