According to temperature proxies and atmospheric concentrations of CO2, through long periods of time, as estimated by examination of drilled ice cores:
-temperature changes PRECEDE changes in CO2.
-therefore, CO2 CANNOT be the principal driver of temp…
According to temperature proxies and atmospheric concentrations of CO2, through long periods of time, as estimated by examination of drilled ice cores:
-temperature changes PRECEDE changes in CO2.
-therefore, CO2 CANNOT be the principal driver of temperature changes.
-there are several, well-understood factors that cause surface temperature fluctuations over geological periods of time, principal among them being changes in the sun’s output and alterations in the shape of earth’s orbit around the sun & variations in the angle of the axis of rotation of the earth, relative to the plane of its orbit.
-then there is the motion of the sun around the barycentre of the solar system, which is not at the centre. This is due to the gravitational pull of the planets, especially Jupiter and Saturn, on the sun
-temperature changes occur first and after a substantial time delay (several hundred years up if not up to one thousand years) the concentration of CO2 in the atmosphere changes in the same direction.
-the reason for the lag is that the mass of the atmosphere is small compared to the mass of the oceans, so it takes a long time for warmer air to warm up the oceans (same lagging process when cooling down).
Technical notes:
1. Atmospheric CO2 is measured directly in trapped bubbles of air, captured when the snow fell.
2. Temperatures were estimated using a proxy, something else that changes with temperature. I’m not familiar with this one, but I think it has to do with the ratio of oxygen isotopes such as O16 & O18, which changes with temperature. So long as the proxy is directionally reliable, precision isn’t important.
3. These principal findings have been reproduced by several independent research groups.
