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Permian Extinction..."carbon dioxide, the chief cause of global warming"

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  • npat1@juno.com
    The Permian mass extinction is now thought to have been caused by gigantic volcanic eruptions that triggered a runaway greenhouse effect and nearly put an end
    Message 1 of 1 , Sep 6, 2003
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      "The Permian mass extinction is now thought to have been caused by
      gigantic volcanic eruptions that triggered a runaway greenhouse effect
      and nearly put an end to life on Earth."

      Source: Copyright 2003 Sydney Morning Herald
      Date: June 20, 2003

      Researchers at Bristol University have discovered that a mere 6
      degrees of global warming was enough to wipe out up to 95 per cent
      of the species which were alive on earth at the end of the Permian
      period, 250 million years ago.

      United Nations scientists from the Intergovernmental Panel on
      Climate Change predict up to 6 degrees of warming for the next 100
      years if nothing is done about emissions of greenhouse gases,
      principally carbon dioxide, the chief cause of global warming.

      The Permian mass extinction is now thought to have been caused by
      gigantic volcanic eruptions that triggered a runaway greenhouse
      effect and nearly put an end to life on Earth.

      Conditions in what geologists have termed this "post apocalyptic
      greenhouse" were so severe that only one large land animal was
      left alive and it took 100 million years for species diversity to
      return to former levels.

      This dramatic new finding is revealed in a book by Bristol
      University's head of earth sciences, Michael Benton, which
      chronicles the geological efforts leading up to the discovery and
      its potential implications.

      Professor Benton said: "The Permian crisis nearly marked the end
      of life. It's estimated that fewer than one in 10 species
      survived.

      "Geologists are only now coming to appreciate the severity of this
      global catastrophe and to understand how and why so many species
      died out so quickly."

      Other climate experts say they are appalled that a disaster of
      such magnitude could be repeated within this century because of
      human activities.

      Global warming author Mark Lynas, who recently travelled around
      the world witnessing the impact of climate change, said the
      findings must be a wake up call for politicians and citizens
      alike.He said: "This is a global emergency.

      "We are heading for disaster and yet the world is on fossil fuel
      lot." There needs to be an immediate phase-out of coal, oil and
      gas and a phase in of clean energy sources. People can no longer
      ignore this looming catastrophe."

      (degrees in C)

      http://www.climateark.org/
      http://forests.org

      Major extinctions: Permian (250 mya) and PETM (55 mya)
      > carbon dioxide, the chief cause of global warming<

      Pat Neuman
      Twin Cities


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