Revised Chapter 25 is available here fact checking.
Thanks for all the feedback on the prior draft of this paleoclimate chapter.
This revised version should be clearer – I hope understandable to the non-scientist.
I believe that this way of framing Earth orbital effects clarifies some
scientific issues, for example: absent humans was Earth in for a long
interglacial, like the one 400,000 years ago? No, the planet was headed
into a big drop toward the next ice age.
Humans have now overwhelmed these weak paleoclimate forcings by tromping
on the accelerator – but there is nobody at the steering wheel! We
still have time to turn down the forcings before extreme consequences
appear, but our actions should be informed by an understanding of past
climate change.
You can sign up for our monthly global temperature updates here.
You can sign up for my other Communications here.
I opened a Twitter account @DrJamesEHansen, (https://twitter.com/drjamesehansen), but I am focusing mainly on finishing the book.
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