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A team of scientists from the UK and Australia has shed new light on the mysterious mechanism by which the Southern Ocean sequesters carbon from the atmosphere. Winds, vast whirlpools and ocean currents interact to produce localized funnels up to 1000 km across, which plunge dissolved carbon into the deep ocean and lock it away for centuries. Critically, these processes themselves – and the Southern Ocean's ability to affect global warming caused by human activities – could be sensitive to climate variability in as-yet-unknown ways.
Understanding these subduction pathways fully is key to predicting how climate change might alter the Southern Ocean's carbon sequestering capabilities.
In an attempt to address global warming, a handful of power plants are capturing carbon dioxide during the energy-generation process, liquefying the gas under high pressure and piping it to geologic storage sites miles away.
Harvard University professor of Earth and Planetary Sciences Daniel Schrag addressed some of these concerns in a 2006 PNAS paper, in which he suggested storing carbon dioxide in porous sediment hundreds of meters below the sea floor in deep parts of the ocean. Stored at this depth, under higher pressure and temperatures, the carbon dioxide should be less buoyant and remain trapped indefinitely
Both global warming and the Antarctic ozone hole increase the temperature gradient between the equator and the pole, which intensifies the southern hemisphere winds. Climate models predict that stronger winds could stir up deep waters, especially in violent seas such as the Southern Ocean, and result in a net release of carbon back into the atmosphere.
Originally posted by nixie_nox
reply to post by JustXeno
Both global warming and the Antarctic ozone hole increase the temperature gradient between the equator and the pole, which intensifies the southern hemisphere winds. Climate models predict that stronger winds could stir up deep waters, especially in violent seas such as the Southern Ocean, and result in a net release of carbon back into the atmosphere.
What the poster doesn't understand is that this is a process already taking place. The carbon that humans have put out has already exceeded the ocean's ability to absorb them, even with mechanisms such as these. he is trying to pretend that this is new.
What the article states it that global warming, might actually alter that effect.
Originally posted by Unity_99
I don't consider the sinkholes to be natural events.