Jellyfish Are the Dark Energy of the Oceans - fluid drift
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Stumble ThisFrom Wired:
"The fluid dynamics of swimming jellyfish have provided a plausible mechanism for a once-wild notion: that marine animals, hidden from sight and ignored by geophysicists, may stir Earth’s oceans with as much force as its wind and tides.
"Called induced fluid drift, it involves the tendency of liquid to “stick” to a body as it moves through water — and a little bit of drift could add up quickly on a global scale."
"'As a body moves in a fluid, a high-pressure field is created in front of the body, and a low-pressure field behind. Because fluid moves from high to low pressure, the fluid that’s adjacent to the rear of the body moves along with it,” said Katija. “You get a permanent displacement of the water.'"
"If swimming generates tide-scale forces, then 'it has an impact on global climate. This is a rather novel twist to the whole climate story,' said William Dewar, a Florida State University oceanographer. 'How one would extend existing models to include a biosphere mixing input is not clear, largely because no-one has spent much time thinking about it.'"
"The fluid dynamics of swimming jellyfish have provided a plausible mechanism for a once-wild notion: that marine animals, hidden from sight and ignored by geophysicists, may stir Earth’s oceans with as much force as its wind and tides.
"Called induced fluid drift, it involves the tendency of liquid to “stick” to a body as it moves through water — and a little bit of drift could add up quickly on a global scale."
"'As a body moves in a fluid, a high-pressure field is created in front of the body, and a low-pressure field behind. Because fluid moves from high to low pressure, the fluid that’s adjacent to the rear of the body moves along with it,” said Katija. “You get a permanent displacement of the water.'"
"If swimming generates tide-scale forces, then 'it has an impact on global climate. This is a rather novel twist to the whole climate story,' said William Dewar, a Florida State University oceanographer. 'How one would extend existing models to include a biosphere mixing input is not clear, largely because no-one has spent much time thinking about it.'"
