Hey guys,
This thread is about environmentalism, and that certainly includes climate change. However, as I've pointed out in an earlier post, the bulk of environmentalism is scientific study and proactive conservation (as opposed to turning in plastic bottles behind the supermarket), and as such, denying anthropogenic climate change with material sourced from the latest libertarian websites really doesn't qualify as climate science, and by extension, doesn't qualify as science in any respectable way.
If you guys truly want to debate this issue, feel free to start a thread about it. Before doing so, I would earnestly suggest both of you get up to speed on the following topics so we have a baseline to start with:
- Climate change induced precipitation patterns and how it will affect agriculture
- Milankovitch cycles and ice age patterns
- Ice albedo feedback loops
- The Oregon Petition, Frederick Seitz, and various libertarian documents masquerading as science
For this thread, I'd prefer we stick to real science. Thanks.
I, for one, do not deny that the climate is changing. Nor do I deny that the trend is towards a warmer climate. I won't even contest that human activity contributes in that general direction. What I will deny, because I actually understand the sciences involved and how complex they are, is that we actually understand enough about the biosphere or the global climate to make the claims that some people will do. I most certainly oppose the efforts to use the force of governments to compel people to alter their behavior under the claims that "the science is settled". The science is not only not settled, the best & brightest openly admit that they don't really understand it all well enough to make a solid determination. It's the politically minded hacks that compare climate change skeptics to holocaust deniers. And even if the science were actually settled, there is very little evidence that we could actually slow that warming trend to any significant degree without killing off a large percentage of the population of the planet either by starvation or warfare.
And all that before we even consider the possibility that a
moderate rate of change (which is what we have actually been getting despite decades of climate change histeria, yes I'm old enough to remember the early 80's and the claims that Mexico and some of the Southernmost US states would actually be
inhabitable by now) might actually be a
net positive for humanity at large, even if it does prove to be a net burden on people who live in sub-tropical coastal regions. There are massive tracts of arable land that could be opened up to productive agriculture and human settlement in the northern-most latitudes, predominately in Canada, Greenland & Russia. See, there is one thing about global warming predictions that are not often talked about by those who warn against climate changes; and that is that the rising temp trends are not going to be evenly distributed across the latitudes. Because of the way that greenhouse gases work (i.e. shortwave infrared light from the sun passes through mostly unattenuated to strike the Earth's surface, while longer wave IR tends to be 'refracted' back towards the Earth like shortwave radio waves are reflected by the E-level of the ionosphere, thus functioning like one of those mylar emergency blankets) the retained heat tends towards spreading across great distances. So while the equater does get most of the sunlight and would warm somewhat, higher latitudes would tend to receive more IR heat from warmer latitutes than they radiate back. Thus, most of the warming is going to occur in regions
where a slightly warmer climate could make the difference between only growing winter wheat, or growing corn instead. The climate is always, always changing. As recently as 400 years ago there was still an inland sea in the Western US states, where the salt flats are today, that contributed to a wetter climate in that region than exists today. Things change and populations migrate. There is no reason to expect that it will be different after the Industrial Revolution, in that regard, than it was prior.
Also, keep in mind that the Earth is a closed system, and any externally gained carbon is less than trivial even over millinia. At some point in Earth's history, it was a molten ball of rock surrounded by a mixed gas atmostphere. There were no trees, and oxygen is never found free under such conditions unless all of the available carbon was already consumed. So, at one point in Earth's history, all of the carbon (or nearly all) that we worry today about being released into the atmostphere was actually in that old Earth atmostphere. So the idea that there is some point at which the amount of carbon-dioxide in the atmosphere starts a positive feedback loop within this closed system to destroy life on Earth is both rediculous and provablely false on that data point alone. For if it were true, how in the hell could live ever have evolved to start with? I'm not saying that
humans are going to want to live that way but we are little more than a minor infection to the Earth's biosphere.
EDIT: I got the short & long wave IR's reversed in the above description, but other than that it is correct.