Quote:
Originally Posted by Sephiroth
But look where they happened: right near/at the top of the 140,000 year cycle.
One thing I can do understands that whenever the 140,000-year change is about to tip us over the line, we have made it 150 years or so sooner.
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The last cycle is measured around a 20,000-year timespan. 150 years is not a relevant measurement. It's not like the earth schedules a warming period in for 2173 but we've brought it forward ahead of schedule.
You also ignore the rate of warming which is nothing like the last one which, again, is measured over 20,000 is not precise to a year because they get it from geological evidence and not someone recording a mean temperature into a spreadsheet 125,000 years ago.
The current warming period is not like the last one:
Quote:
Originally Posted by Damien
The warming event 140,000 years ago was the Eemian period. It took roughly 15,000 - 20,000 years to go from ice age (-4) to around +2c. 6 degrees warming over 15,000 years. That's a rate of 0.0004c increase per year.
Meanwhile, it's taken since 1880 to rise 1c. That's a take of 0.007 increase per year. That's 17x faster.
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We don't everything about how this pans out but we do know this is an unnatural rate of warming. This isn't normal or expected.
Look beyond the graph.
This is a good explanation that I understood:
https://climate.nasa.gov/evidence/