Salt of the Earth: How Egypt's coastal sabkhas tell a story of climate and change

This article has been reviewed according to Science X's editorial process and policies. Editors have highlighted the following attributes while ensuring the content's credibility: Have you ever walked across a salt flat so expansive it feels like another planet? That's what it's like standing in Egypt's coastal sabkhas—those otherworldly landscapes where the ground crunches beneath your feet and the air shimmers with heat.

These aren't just barren wastelands; they're living laboratories that record the pulse of our changing climate. Our team spent years studying four distinct sabkhas along Egypt's southern Red Sea coast, and what we discovered surprised even us. These salt flats aren't static—they're growing, shifting and responding to forces both ancient and contemporary.

The story they tell is one of resilience, adaptation and urgent warning. Our findings are published in Scientific Reports. When I first set foot on the Ras Baghdadi sabkha, I was struck by its alien beauty.

Here, the earth is literally tearing itself apart, not from human hands but from the raw power of geology and evaporation. The ground is carved by faults running in every direction, creating a natural plumbing system that draws seawater inland while mountain runoff flows down from the west. Where these waters meet and stagnate, they form something remarkable: an amoeba-shaped salt pond, its waters so saline that only the hardiest microbes survive.

We watched this pond evolve over decades using satellite imagery stretching back to 1973. What began as a crescent-shaped water body has transformed into something entirely different—a testament to how dynamic these systems truly are. The fault lines that control this sabkha aren't just academic curiosities; they're the architects of an ecosystem that supports everything from microbial mats to migratory birds.

Each sabkha we studied has its own personality. Marsa Abu Madd, for instance, is a lagoon-lover's paradise. Here, the sea and the salt flat dance a delicate tango, separated only by fragile sandbars that shift with each storm.