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Buoyancy in surfing: saltwater ocean vs. freshwater wave pool

From SurferToday:

There is a considerable difference between surfing in a saltwater ocean wave and riding a board in a wave pool. The keywords of this equation are density and buoyancy.

If you visit the Dead Sea and go for a dip, you’ll notice a feeling similar to astronauts when they experience an absence of gravity.

It seems like there’s an unusual force pulling you upward – you’re floating effortlessly and with no need to tread water.

On the opposite side of the spectrum, a swimmer will perceive that it is harder to stay afloat and move in a chlorine-cleaned freshwater pool.

So, what are the variables of physics at stake? Why do oceans and pools have distinct buoyancy levels?

Head to to read more.