Psudo wrote:
The conversation seems to dwell on a few discrete points, which I'll list and comment on.
1) How do we determine experimentally whether or not carbon is the driver of global climate?
What kind of experiments would you require? At least the radiative effects of greenhouse gases can be known experimentally. Global experiments are of course not possible so there has to be something less which would be sufficient.
Psudo wrote:
Definitive results can only be had, as far as I can see, by a global experiment, such as the one proposed by the IPCC: dramatically alter global carbon emissions to see if temperature changes as their favored simulations predict. Scientifically, this is a reasonable test. Politically, it's idiotic; it is an immoral brand of authoritarianism to alter global societal behavior in order to prove a scientific theory. Economies will rise and fall, industries will fail and flourish, people will get aid and starve based on such a widespread political action. The effect on lives, industry, and governments is dramatically more relevant than the intellectual pursuit of a scientific principle.
The goal of efforts like the Kyoto protocol isn't experimentation. But if one insists calling it an experiment then one could also say that we are already running a very dangerous experiment with the effect of industry on the climate.
Psudo wrote:
But you yourself have said you don't believe in an impending catastrophe. So what justifies this to you? I suspect it is because of the next point:
I more like said that I don't believe in an unavoidable catastrophe. This of course depends on how high damage one considers a catastrophe.
Psudo wrote:
2) What are the side-effects of cutting global carbon emissions? I call it global authoritarianism, but you seem to see no threat or danger in it. I completely fail to understand your reasoning here.
I don't think it is any more authoritarian than any other government regulation.
Psudo wrote:
The vast majority (about 85% and growing [
DOE]) of our global technological lifestyle is based in carbon-emissions. Cutting (or capping or regulating) carbon emissions will make everything technological or dependant on technology more expensive and, thus, less available. That is the intent, make fossil fuels more expensive to drive society to alternatives. But the economic damage affects alternative fuel technologies and materials, too. All alternative energies and fuels are dependent on technological processes, which are powered from that same pool of largely carbon-dependent energy. Cutting carbon emissions may give us more time to find a solution, but they also cripple our ability to implement any solution. It's like a foot race where you can get a head start if you shoot yourself in the foot.
I've not seen any evidence that cutting emissions would make it significantly more difficult implement any technological solutions.
Psudo wrote:
Also, everything will be more expensive to grow, harvest, process, and ship (unless done by manual labor). Everyone but farmers will pay more for food, everyone but textile workers will pay more for clothes. The poor, nations and individuals, will suffer the most. Charitable aid will be more expensive to ship, so more goodwill will provide less comfort. Medical supplies will cost more. It is forcing people to drop their dependence on experts and specialization, upon which modern society is based, and live only on what they can do for themselves. It is a force towards medieval economics, local production and trade without technological convenience nor comfort. It will not be an absolute move in that direction, but a tiny part of the effect is still a smaller, identical effect. There is nothing good about a move of any size towards medieval economics.
Of course emission reductions would require some sacrifices these don't seem to be excessive if one is to believe
IPCC (pages 11 and 12).
Psudo wrote:
3) Is the current global warming trend dangerous? Only by comparing the (largely environmental) danger of inaction to the (largely economic) danger of action can we determine which is the better approach.
The 4th Assessment Report you linked me to shows 6 potential peaks for global warming, all ending within the next 100 years and with between 2° and 6° of total warming. How do the effects of 2° of warming compare to 6° or 10° or any other number?
Warming would certainly have not just environmental but also economical effects and developing countries are in general more vulnerable.
IPCC has more on this.
Psudo wrote:
Quantium Wizard wrote:
As far as I can tell, as a non-expert, the science seems sound. Though, I wouldn't be so confident about this if there weren't so many scientists agreeing about it.
So if the consensus were proven to be a governmental fabrication, as some who have left the IPCC claim, that would shake your confidence?
Yes, it would.
Psudo wrote:
Something overpowered carbon in the '50s, demonstrating that, for that period of time at least, carbon was not the driving force determining global temperature. It was not then, so why is it now? Carbon was overwhelmed then, so why not use that same force to overwhelm it now?
Sulfate aerosols in troposphere would be rather problematic. The post at RealClimate I linked to earlier discussed injecting sulfate aerosols into stratosphere. I don't know how viable solution that would be but I think that on the short run emission reductions would most viable and they would make any possible other mitigation efforts easier later.
Psudo wrote:
Quantium Wizard wrote:
And what assumptions would produce [claims that CO2 does not have a primary role]? I've not heard of anything like that.
I'm not going to be able to enumerate all the assumptions that go into a computer climate model any more than you would be able to. Various climate scientists have raised concerns about climate modeling subjecting itself to the biases of the modelers. For example, NASA climatologist Roy Spenser says "
Climate models are only as good as the assumptions that go into them. And they have hundreds of assumptions. All it takes is one assumption to be wrong for the forecast to be way off."
Of course I don't expect you to into details of climate modeling. That would be unreasonable.
But the climate has been simulated with different models and also using slightly different parameterizations to evaluate the uncertainty in the projections. As far as I know the models do reproduce past climatic changes but fail to reproduce the recent warming if effect of increased greenhouse gases is omitted. Are there any physically reasonable models that would give different results?
Psudo wrote:
Quantium Wizard wrote:
There isn't one major scientific organization that would reject AGW.
What of major scientific organizations advocating specific government policies in response to it? To advocate politically is to exit the realm of science and enter the realm of politics, suggesting that it's impossible for a strictly scientific organization to advocate carbon regulation as a policy. Thus, government organizations promoting such cures are acting without the backing of purely scientific agencies as well.
That is my primary criticism of the IPCC, it's politicization of science. I consider it's publications political advocacy rather than scientific findings for that reason.
I don't think scientific organizations couldn't comment on government policy. And since climate change is a problem that potentially requires a political response I don't think IPCC would need to act "aloof and above petty politics".
On the purely scientific side of the issue IPCC's stance represents a broad consensus and thus you needn't trust UN alone.
Psudo wrote:
Here's some info on a scientific study regarding cosmic ray driven global temperature from the AGW-skeptic site
JunkScience.com. It has links to the media release, the study's publisher, and other useful information. It shows a pretty strong correlation between low-atmosphere cloud formation and cosmic radiation during the 15 or so years for which cosmic ray information is available.
Clouds, it turns out, are an important aerosol affecting earth's surface temperature. The study suggests:
The 2% changes in low cloud cover in just 5 years, as seen in Figure 4, should vary the heating at the Earth’s surface by an average of about 1.2 watt per square metre. That figure can be compared with about 1.4 watt per square metre estimated by the Intergovernmental Panel on Climate Change for the greenhouse effect of all of the increase in carbon dioxide in the air since the Industrial Revolution.
According to
RealClimate there hasn't been a trend in cosmic rays so it seems that couldn't explain the recent warming even if the mechanism itself were correct.