Quote:In prehistoric times, during the Permian, in the Palaeozoic Era, for example, the concentration of Carbon Dioxide dropped below 210 ppmV. Throughout the Permian Period plant and animal species diverged and diversified as never before. Dinosaurs prospered and predominated over all the other orders of vertebrates. Coniferous plants first appeared in the Permian. The change of atmospheric temperature at the time of the Permian was around 10 °C. By comparison, the current change of global temperature is only 0.52 °C while the concentration of atmospheric carbon dioxide is 385 ppmV. If the global temperature is dependent on CO2, then the change of temperature at present would be around 10 °C or higher, as it was during the Permian Period.
From the early Triassic to the middle Cretaceous, the concentration of atmospheric Carbon Dioxide was similar to its current density. From the late cretaceous to the early Miocene, the concentration climbed above 210 ppmV. During the Holocene period, the concentration has oscillated from 210 ppmV to 385 ppmV.
It is possible that the concentration of atmospheric CO2 will increase normally in the course of the next 50 million years to 1050 ppmV or 2500 ppmV.
We have also observed that the concentration of atmospheric CO2 increases several centuries after glaciations. Perhaps this is due to the fact that most plants perish at sub-zero temperatures, and plants are organisms that capture Carbon Dioxide from their surroundings to make food.
Scientists have also observed that the concentration of atmospheric CO2 increases during periods of warming. However, an increase in temperature always precedes an increase in carbon dioxide, which generally occurs decades or centuries after any change of temperature. We have not observed an increase in the concentration of Carbon Dioxide to have preceded a period of warming. This latter phenomenon occurs because when oceans absorb more heat from an increase in the amount of direct solar irradiance incident upon the Earth's surface, they release more Carbon Dioxide molecules into the atmosphere. Nevertheless, most drastic increases in CO2 concentration occur decades or centuries after the oceans have warmed up. For example, the present increase of atmospheric Carbon Dioxide was caused by an extraordinary increase in solar activity in 1998 which warmed up the El Niño South Atlantic Oceanic Oscillation.
These increases in concentration of atmospheric CO2 offer optimal conditions for the development and evolution of living beings on Earth. Human beings should adapt to these natural changes by means of science and technology.
I'm pretty sure there is a graph somewhere Monk which in fact shows the Ordovician Era with a CO2 level of 2240ppm it seems the Earth survived that, no tipping point, no Earth turning into Venus, no alarmists running around like headless chooks.
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