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this post was submitted on 29 Jun 2024
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How well sound propagates through water is highly dependent on the water temperature variations over depth. There can be conditions in which sounds can be trapped between two different horizontal "layers" and travel far greater distances than 80km.
Wow, that's cool. Completely makes sense but not something I'd thought about...
Would the temperature differences need to be very large for this effect to occur?
"The SOFAR channel (short for sound fixing and ranging channel) ... is a horizontal layer of water in the ocean at which depth the speed of sound is at its minimum" ...
"The SOFAR channel acts as a waveguide for sound, and low frequency sound waves within the channel may travel thousands of miles before dissipating." ... https://en.m.wikipedia.org/wiki/SOFAR_channel
Crazy stuff, thanks!