General Discussion

AverageJoe90

(10,745 posts)

153. I didn't say what you thought I said re: Venus.

Thu Oct 18, 2012, 07:03 PM

Oct 2012

Mercury is closer to the Sun than Venus.

Very true, but Mercury has virtually no volcanism or any atmosphere to speak of; that's a large part of the reason that it also gets extremely cold in areas not facing the sun's rays.

The fact that you think proximity to the Sun dictates heat absorbtion really kind of disqualifies your opinion on this matter. What dictates absorption is atmospheric composition. Just because we don't have the same composition as Venus doesn't mean we can't wind up with a runaway warming scenario.

Way to take me out of context, Doc. I never said the Sun had ALL to do with heat absorbtion, and in fact, I actually did mention that the atmosphere's composition was a major part of why Venus is so hot. So, I don't know where you got the idea that I insinuated that the Sun had everything to do with it.

So, over what period of time was that 2.5°C change?

Here you go:

the figure I quoted is in the green. As far as I know, the Cariaco Basin in Venezuela has been a decent marker for observing climate change over time.

However, though, it appears that it could have been even higher than that:
http://en.wikipedia.org/wiki/Younger_Dryas#End_of_the_climate_period

edit-Here's a few more graphs:

https://encrypted-tbn1.gstatic.com/images?q=tbn:ANd9GcRLXw0W0qaNuUVBaUtPNEben_ODyzNy1o2mCP5c3-hhPJZO4e8G7eNHgg

So, it does look like I may need to reconsider a few things regarding the YD period.

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