Lake Michigan looks calm from shore, but a 2013 11 kg of red dye experiment revealed its hidden waters can spread far faster than scientists expected

A 2013 dye experiment in Lake Michigan revealed that water in the lakes open interior can spread surprisingly quickly. Researchers traced a fluorescent dye plume for hours and found that near-surface shear linked to Poincaré waves helped drive unexpectedly rapid dispersion. Researchers observed the dye's dispersion rate increase from approximately 1.5 to 4.2 square metres per second over about 21 hours.

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