And a miracle occurs here . . .

Discussion in 'Environmental Discussion' started by bwilson4web, Oct 31, 2019.

  1. bwilson4web

    bwilson4web BMW i3 and Model 3

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    Source: Antarctic sea ice is key to triggering ice ages, study finds

    . . .
    Building on a study Jansen published a couple of years ago, Jansen and Marzocchi fleshed out a model of how the glacial transition could have played out.

    In their picture, the atmosphere cools enough to cause Antarctic sea ice to start building. "The Southern Ocean around Antarctica plays a key role in ocean circulation, as it is a region where deep waters rise to the surface before disappearing again into the abyss," Jansen said. "As a result, increased Antarctic sea ice has outsize consequences."

    The lid of ice changes ocean circulation, but it also physically blocks the ocean from exchanging carbon dioxide with the atmosphere. This means more and more carbon is drawn into the deep ocean and stays there. Less carbon dioxide in the atmosphere would lead to a reverse greenhouse effect, causing the planet to cool.
    . . .

    The reason for my interest is a world famous FOX climate scientist cited this study:
    REPORT: ‘Explosion’ in Antarctic Sea Ice Levels Could Spark Another ‘Ice Age’ | Sean Hannity

    Bob Wilson
     
  2. tochatihu

    tochatihu Senior Member

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    The study (indirectly) cited emphasizes role of low CO2 in thermal balance. That low [CO2] is required for ice ages. Glad that Hannity drew attention to it.
     
  3. bwilson4web

    bwilson4web BMW i3 and Model 3

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    That is what 'raised my eyebrows.' I did not see a mechanism proposed to reduce the CO{2} yet by a miracle, it happens. I suppose acknowledgment of the CO{2} mechanism is some progress.

    Bob Wilson
     
  4. tochatihu

    tochatihu Senior Member

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    The Nature Geosciences article has a mechanism. Which I call "Krill or be krilled"

    Happy Halloween
     
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