Michael G. O'Brien; Earth will still exist even without life. As new data and events happen, the trajectory can change. We once had a long interglacial from the fact the orbital perturbation and axis tilt wobble do not exactly always coincide close enough. So it is with this; "The next big chill may be overdue. If humans hadn’t boosted levels of atmospheric carbon dioxide, Earth’s next frosty bout of glacial growth probably would have already started, new research suggests.
For the last 11,700 years, Earth has been on a break between periods of ice expansion called glaciations. A similar interglacial period occurred around 790,000 years ago. A new climate reconstruction based on sediments from an ancient Italian lake shows that this historical interglacial lasted only about 10,800 years. The result suggests that the current interglacial should be wrapping up — but it’s not" https://www.sciencenews.org/.../next-ic ... -be-hold..
Next icy era may be on hold
Carbon emissions from humans may have postponed Earth’s next glaciation, new research suggests.
However, this time the axis tilt wobble is near maximum and so is the ellipticity of orbit, which would normally lead to increasing snow and nice and albedo change which cools the planet further and keeps it in an ice age until axis tilt minimum and orbital circularity coincide roughly. Volcanic events can change albedo and have an atmospheric cooling effect and ash fall changes albedo for more melt . If the population crash is triggered by a combination of due geologic events like Cascadia, La Palma, and Katla, then the emissions would also lower dramatically. Perhaps to the point that when Yellowstone goes in 2K+ years, it could trigger the ice age at a later date. Only if emissions are decreased enough within a decade or so, otherwise even mighty Yellowstone could not stop the GTE Events. IMEO
On the chance that Cascadia, La Palma, or Katla do not happen within a decade or so, the human population will crash from overpopulation and CAGW effects by the early 2040s, which is too late. It is possible that a nuclear war could put up enough aerosols to cool the planet and kill off much of humanity with nuclear winter and radiation. This could change the trajectory. A one year volcanic or nuclear winter would crash the population, but not take care of momentum, so ten years later it could be hotter than ever. It all depends on when it happens. Not nice events at all, but certainly better than a total methane turnover, and the 'Venus Effect'.
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