Climate Variation

Just a thought - Could this be a reason for our weather extremes?

Climate Science: Investigating Climatic and Environmental ProcessesBeyond 100,000 Years (+105 Years)In general, much more is known about the Earth's history in the past 500 million years than the prior four billion years. In examining past climate changes, including intervals of glaciation and changes in the atmospheric composition, scientists have considered how plate tectonics-- interactions caused by the movement of lithospheric plates- have impacted the climate system.
The lithosphere-- the rigid outer shell of the Earth-- is now broken into a dozen major tectonic plates that over the past hundreds of millions of years have migrated around the planet. Using paleomagnetic data, scientists have been able to reconstruct where the various plates and continents were located at different times in the past. The figure to the left shows estimates of sea level over the course of more than half a billion years of geologic history. The causes of such changes in sea level are complex and are not always directly correlated with changes in global temperature, but generally higher sea levels reflect warmer temperatures. For example, 100 million years ago, the Earth's temperature was 20° - 40° Celsius warmer (or 36 ° - 72 ° F) in the polar regions, although only a few degrees warmer around the equator. Evidence suggests that during warm Cretaceous periods, levels of atmospheric carbon dioxide were high. (Barron, et. al., 1985.) Models indicate that carbon dioxide may have been four to six times the pre-industrial levels. (Otto-Bliesner, et. Al., 2001.)