Paleoclimate Implications for Human-Made Climate Change (draft of new Hansen paper)

[wtmusic]

Abstract:

"Milankovic climate oscillations help define climate sensitivity and assess potential human-made climate effects. We conclude that Earth in the warmest interglacial periods was less than 1°C warmer than in the Holocene and that goals of limiting human-made warming to 2°C and CO2 to 450 ppm are prescriptions for disaster. Polar warmth in prior interglacials and the Pliocene does not imply that a significant cushion remains between today’s climate and dangerous warming, rather that Earth today is poised to experience strong amplifying polar feedbacks in response to moderate additional warming. Deglaciation, disintegration of ice sheets, is nonlinear, spurred by amplifying feedbacks. If warming reaches a level that forces deglaciation, the rate of sea level rise will depend on the doubling time for ice sheet mass loss. Gravity satellite data, although too brief to be conclusive, are consistent with a doubling time of 10 years or less, implying the possibility of multi-meter sea level rise this century. The emerging shift to accelerating ice sheet mass loss supports our conclusion that Earth’s temperature has returned to at least the Holocene maximum. Rapid reduction of fossil fuel emissions is required for humanity to succeed in preserving a planet resembling the one on which civilization developed."

http://columbia.us1.list-manage.com/track/click?u=0ebaeb14fdbf5dc65289113c1&id=82345f4c72&e=5bbc9310b8

Lou Grinzo: "When will humanity learn to see the difference between 'alarmism' and 'wicked smart people who connect the dots before you do'?”

[Systematic Chaos]

1. I'm still waiting for a sheet of ice many hundreds or thousands of square miles...

...to slide off either Antarctica or Greenland.

That's going to be fun, if you're into global tsunamis.

[Liberty Belle]

2. Hmm...how do coax all those global warming deniers to invest in some nice coastal real estate?

[notesdev]

3. Maybe Al Gore can give them a nice deal

http://www.latimes.com/features/home/la-hm-hotprop-gore-20100428,0,4103538.story

[guardian]

4. I already did

It's called Colorado.

[zeaper]

5. Cool picture !!!

It would be better if docks around the buildings and a few boats were added though.

[wtmusic]

6. More here:

http://www.treehugger.com/galleries/2009/03/7-terrifying-global-warming-pictures.php

[Nihil]

9. That Diesel ad is appalling ...

They think that all this is a f*cking joke?

Somebody needs a serious wake-up lesson ...

:mad:

[joshcryer]

7. Wow. Thanks for this. Hansen will be seen by history as a very astute person.

[highplainsdem]

8. K&R