Deep below the cold, dark surface of Lake Superior, sensors strung like pearls along a vertical steel cable sway with the currents. Recording the lake’s dropping temperatures as winter sets in, their gentle rhythm belies their worrying readings: the lake is getting warmer.
Jay Austin heaved several of these science experiments off a boat last fall – tossing concrete blocks into the deep water to anchor the cable of sensors stretching down from floating platforms just below the surface.
Great Lakes Now
https://www.greatlakesnow.org/2021/03/lake-superior-researchers-impact-warming-winters/