3 ms·
a.) co2 fluctuations might have never been large enough to trigger the effect. b.) there have been plenty off mass extinctions in the past, the question is: do
by j-pb 6y ago
a.) co2 fluctuations might have never been large enough to trigger the effect.
b.) there have been plenty off mass extinctions in the past, the question is: do you want to be in one
- hollerith 6y agoco2 levels in the air have been higher in the past million years than they are now or will be in 50 years.
- philipkglass 6y agoAtmospheric CO2 levels are currently higher than they have been in the past 3 million years. https://e360.yale.edu/digest/co2-concentrations-hit-highest-levels-in-3-million-years https://e360.yale.edu/digest/co2-concentrations-hit-highest-...
- soperj 6y agoFrom your article: >The last time CO2 levels were this high was during the Pliocene Epoch, 5.3 to 2.6 million years ago, when the Earth was several degrees warmer, sea levels were an estimated 50 feet higher than they are today, and forests grew as far north as the Arctic. Doesn't really point to phytoplankton populations crashing as being a likely scenario.
- j-pb 6y agoLike I said. The phytoplankton of that time, is not the same phytoplancton we have today. There are evolutionary drivers that push lifeforms towards efficiency. A thick, protein rich, acid resistant shell is much more expensive, than a thin, calcium rich one. Well... until the day a new outlier species comes along and turns back the clock by 3 million years, in 100. To put that into perspective, it's like asking you on vacation to the bahamas giving 7 days to pack your stuff, and when the time to leave arrives I yell: "Surprise! We're actually going to siberia, time to pack your winter coat, the plane leaves in 20 SECONDS!"