
Originally Posted by
Hoosier8
But it is possible to say that it will probably happen again
Eventually, but studies have suggested that the current burning of fossil fuels will prevent ice ages for the next half million years. See Archer & Ganopolski 2005.

Originally Posted by
Hoosier8
and that much of what we know about current warming comes from a very very short span of time of actual temperatures and plenty of speculation.
Is quantum mechanics speculation? Is the Beer-Lambert Law speculation? Are the Navier-Stokes equations speculation? Is the absorption spectrum of CO2 speculation? Is conservation of energy speculation? If not, precisely what speculation are you objecting to?

Originally Posted by
Hoosier8
To believe that it will never happen again and the earth will warm to previous temperatures before 2.5 million years ago means you have to believe in a man made "tipping point" that will overcome all natural occurences, which is some point that no one can identify but it sure sounds good for scaring the populous into social changes they may not welcome.
The last time global CO2 levels were as high as they are today and stayed that way for a century or more was in the Middle Miocene, about 15 million years ago. At that time, global temps were 3 to 6 K warmer than today, and sea levels were about 100 feet higher than today. Tell me why you think that result cannot happen this time around. And tell me why that result is nothing to be concerned about.

Originally Posted by
Hoosier8
There is plenty of reason to believe that we are contributing to warming, but there is no real consensus on how much or how much is actually natural.
False. The scientific consensus on this point is actually pretty good.

Human vs. natural contributions to global warming, according to: Tett et al. 2000 (T00, dark blue), Meehl et al. 2004 (M04, red), Stone et al. 2007 (S07, green), Lean and Rind 2008 (LR08, purple), Huber and Knutti 2011 (HK11, light blue), and Gillett et al. 2012 (G12, orange).

Originally Posted by
Hoosier8
Most climate models need changing when new things are discovered, which means they were flawed in the first place due to ignorance.
Exactly the opposite is true. Models are flawed not because we know too little, but because we know so much that not everything we know can be put into a model and still make it run faster than real time. Therefore modelers have to pick and choose what to put in and what to leave out.

Originally Posted by
Hoosier8
All, and I mean ALL, of the predictions are based on assumptions and computer modeling.
All, and I mean ALL, scientific laws are models. If you don't believe in models, you don't believe in science.
The Top 5 Tactics of climate denial:
1. Cherry Picking 2. Fake Experts 3. Impossible Expectations 4. Misrepresenting the Science & Logical Fallacies 5. Conspiracy Theories
Diethelm & Mckee 2009
Honesty is not on the list.
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