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Towards COP21
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kenneal - lagger
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Joined: 20 Sep 2006
Posts: 9822
Location: Newbury, Berkshire

PostPosted: Thu Dec 24, 2015 8:19 pm    Post subject: Reply with quote

Quote from that article

"The Sun may be getting hotter and brighter in the distant future but not at the moment."

That is presumably the same in the past.
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fuzzy



Joined: 29 Nov 2013
Posts: 595
Location: The Marches, UK

PostPosted: Fri Dec 25, 2015 1:14 am    Post subject: Reply with quote

UndercoverElephant wrote:
kenneal - lagger wrote:
So global warming isn't man made after all!! Very Happy

On that time scale I don't think we have to bother about warming from that source!


But we were talking about the timescale between the Carboniferous era and today. The point I was making is that the sun was dimmer/cooler when all that carbon was taken out of the active biosphere.


There was a lot more volcanic activity on earth in the past perhaps from underground radioactive decay.
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UndercoverElephant



Joined: 10 Mar 2008
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PostPosted: Fri Dec 25, 2015 10:07 am    Post subject: Reply with quote

Yeah...I was wrong. The temperature only starts ramping up in a significant way when the star starts to run out of hydrogen.

Smile

Well...

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kenneal - lagger
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PostPosted: Sun Dec 27, 2015 6:12 am    Post subject: Reply with quote

fuzzy wrote:
There was a lot more volcanic activity on earth in the past perhaps from underground radioactive decay.


In the past the crust would have been thinner and the core hotter so magma would have been able to burn through the crust more often. The crust has thickened as the earth has gradually cooled and will continue to do so but at a very slow rate by human standards.
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emordnilap



Joined: 05 Sep 2007
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PostPosted: Fri Nov 04, 2016 11:18 am    Post subject: Reply with quote

raspberry-blower wrote:
Even if the Paris agreement came up with something meaningful it is far too late in the day to make any difference as many of the dreaded positive feedback loops are already in play.

Trying to continue with the current economic model with added green bling is nothing short of insanity.


Paris climate change agreement enters into "force"

Surely they mean "forth", as in November 4th. No? So what is this "force" they're talking about? Anyone any ideas?
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