5 things you need to know about why the Great Lakes are suddenly disappearing from satellite images.
- A bizarre new phenomenon is making sections of the Great Lakes vanish from satellite view. Experts are calling it "lake migration," and it is not a drought. Instead, unprecedented levels of underwater sediment are rising to the surface, creating massive, temporary "false landmasses" that appear as if the lakes are shrinking by thousands of square miles.
- The cause, officials say, is a massive, synchronized algae bloom the size of New Jersey. Driven by an unusually warm spring, the bloom is mixing with hardened sediment kicked up by record-high winds. This creates a thick, floating crust that reflects light back to satellites, confusing them into reporting shallower water or dry land.
- This is creating a financial emergency for cargo ships. With the "missing" water, ships are seeing their GPS charts go haywire, forcing the shutdown of several major shipping lanes. Captains report depths suddenly dropping by 10 feet in minutes, leading to the highest insurance claim spike in the region's history.
- Tourism is taking a bizarre hit. Anglers are catching fish from the "new" landmasses, but the fish are dying within seconds of being pulled up. Biologists suspect the crust is trapping a toxic gas cocktail beneath it, turning the surface of the lake into a deadly, invisible lid.
- Scientists are racing to deploy "bubble curtains" to break up the crust. The extreme measure involves pumping a constant wall of air from the lakebed to "pop" the murky top layer. If it fails, experts warn the Great Lakes could permanently lose 15% of their visible water mass within the next year.