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A 9 degree difference will wipe out almost all phytoplankton biomass responsible for generating most of the oxygen in our planet. You will see a raise in multip
by Daishiman 7y ago
A 9 degree difference will wipe out almost all phytoplankton biomass responsible for generating most of the oxygen in our planet. You will see a raise in multiple meters of sea level, causing mass migrations involving over 20% of the world population, will make most of the planet uninhabitable, and will reduce the oxygen levels of the oceans to the point that they will be mostly anoxic.
That is an extinction level event greater than the Permian mass extinction.
- mrep 7y agoSo what specifically in your list do you think will cause humans to go extinct?
- codebje 7y agoPhytoplankton are also responsible for 50-80% of atmospheric oxygen, so in the parent poster's scenario I think the loss of a breathable atmosphere is the most likely nail in our species' coffin. Probably won't happen, probably not a great idea to push things to see how far we can let things go before it's catastrophic, though.
- Daishiman 7y agoI don't need to speculate on this. There is never anything "specific" as any one of these things individually and all things combined are a death sentence. With a 9 degree temperature increase a large amount of the planet simply becomes uninhabitable during the summer, period.