So, you're claiming that CO2 at double the amount in the atmosphere will only be a 1.2 degree rise in temperatures?
Okay, let's see you evidence.
Also, what do you think a 1.2 degree rise will do to the earth?
Current sea level rise - Wikipedia, the free encyclopedia
So, since 1950 we've seen a rise of about 0.6 degrees in temperature and a rise of 3 inches in sea level. So double that and we're looking at a rise of 6 more inches.
What it could be like if it gets way too high.
If the projected temperature from Doubling CO2 was just the "CO2 only" contribution -- it wouldn't even be making the news. Because the NEXT doubling takes CO2 from about 560ppm to 1120ppm --- FAAAAR into the future.
The 1.2degC is the generally agreeded upon number for CO2 only influence.
CO2 no-feedback sensitivity | Climate Etc.
The IPCC TAR adopted the value of 3.7 W/m2 for the direct CO2 forcing, and I could not find an updated value from the AR4. This forcing translates into 1C of surface temperature change. These numbers do not seem to be disputed, even by most skeptics. Well, perhaps they should be disputed.
Even the cult leader James Hansen started this out by saying..
CO2 would directly cause about 1.2ºC of warming if it doubled, without any feedbacks Hansen 1984
This is referred to in GW folklore as "the trigger".. I'll accept the "trigger" or something less than that -- but the rest of the Magic Multiplier are far from "settled science".. Even the latest IPCC report has a HUGE range on the feedback effects from a CO2 doubling. Not an indication of "settled science" either.
No Magic Multipliers -- no crisis. And we'd be spending time fixing REAL PROBLEMS in the environment. We SEEN AND OBSERVED warming more like this simple Doubling number than ANY GW model has projected. About 0.6degC in your lifetime.
Sea level rise since pre-industrial has not accelerated much at all. EVENTUALLY, it will. Because the Climate is rising from the Little Ice Age and the effect of temperature on SLevel rise is highly non-linear. Ice melts at 32degF.. THAT'S when the seas rise. And even at the rate in the 1800s, Greenland would eventually start seeing more months at 32degF or above..
I believe we are in a warming trend, that CO2 is small effect on that rise. And that all those "magic multipliers" are too poorly conceived and modeled to be believed. Because if the Earth Climate System was THAT UNSTABLE -- where a couple degree rise would drive it into Runaway Warming -- we wouldn't be here today to argue about it.[/QUOTE]
You say we're in a heating period. I disagree. I think we should be in a cooling period.
Such a charge shows the ups and down. We should have hit the peak and should be on the way down, not the way up. Never has the temperature gone above the initial peak.
What seems to be the case with natural global warming is, the temperatures rise, CO2 rises, causing more warming. Then it just goes up and up and up and then suddenly stops and temperatures just drop.
The rise in temperatures once the rise in CO2 gets going has seen up to a 12 degrees (Celsius) rise in temperatures within a 10,000 year period.
This happened with a rise in CO2 of from about 180 to 300. That's a rise of 120ppmv.
We peaked at what should have been our maximum CO2 level and temperature level. Things should be going down, not necessarily always going down, but having a downward spiral.
Now, if we were to see a rise of CO2 to say 600ppmv, where would we be?
It's hard to know. This chart suggests that historically it is going to be difficult to predict. Because at times CO2 levels hit 7000ppmv and temperatures were only a few degrees higher than what they are now. There were times when high temperatures saw low CO2 levels.
The problem appears to be understanding why temperatures and CO2 did what they did back then, and now they seem to be more consistent. Either that or we simply have bad data from such a long time ago.