Skip to main content

View Diary: CO2 rise ended last ice age (48 comments)

Comment Preferences

  •  I am a bit skeptical of the (0+ / 0-)

    cause and effect thingy...

    Based on the various ice cores, coral records, deep sea sediment/foraminifera records, PRIOR to anthropogenic carbon inputs changing the forcing functions...

    --> Enhanced insolation (solar heating) due to Milankovitch cycling (orbital forcing) plus tectonics (mountain building and movement of plates to places where ice could or could not form)... LED TO warmer temperatures and increased CO2...

    --> Enhanced CO2 tended to keep the planet warmer, and form more acid rain... warmth means melting ice, which exposes rock, and more acid rain means more silicate weathering... which reduces CO2... and so, with reduced CO2 PLUS reduced insolation due to Milankovitch... we go back to cold/glacial periods...

    The pre-human records indicate Solar Insolation leading and CO2 lagging.

    NOW... we've got CO2 leading and temperature lagging, but rising EVEN THOUGH we've got less ice, more acid rain (i.e. more silicate weathering) and SHOULD BE on a downward temperature curve due to orbital cycle...

    I'd be tempted to re-read that paper and check on their leads, lags and the timing of things.

    The only way to ensure a free press is to own one

    by RedDan on Wed Apr 04, 2012 at 12:16:04 PM PDT

    •  Re-read the article (2+ / 0-)
      Recommended by:
      Don midwest, Desert Scientist

      and am downloading the paper for discussion in my department...

      very, very interesting stuff!!

      (even the denier's use of temperature leading CO2 rise based on the antarctic data is specious, ignorant, and mendacious, btw.)

      The only way to ensure a free press is to own one

      by RedDan on Wed Apr 04, 2012 at 12:20:06 PM PDT

      [ Parent ]

Subscribe or Donate to support Daily Kos.

Click here for the mobile view of the site