Global warming - case for human cause
In response to Arthur Lemay's post:
Your post is full of supposition and inaccuracies, and does not in any way prove that global warming is not caused by man, as you claim. You seem driven by some neo-con agenda relating to a totally libertarian (or anarchistic) view of how society should work rather than a rational appreciation of the available evidence.
For example - the NASA measurements apply only to the USA, as is clearly mentioned in the article, yet you claim that they show there has been no warming since 1998. This is not true on a global basis, as is very clearly stated in the article.
You also state that CO2 variations of fractions of 1% cannot possibly control the whole. If you had looked into the science behind anthropogenic global warming theory you would know that this is not claimed in any way. CO2 concentration is just one factor, but it IS a significant one (along with the other human-emitted greenhouse gases which you appear to ignore) and furthermore as concentrations grow its influence is growing. In addition in this current cycle it is the one which is changing quickly and it is the one which we know that we are affecting.
Water vapour does have a significant effect but it is short-term in its duration (it is always cycling between ground and air) and is a feedback factor rather than a primary forcing agent. Its concentration in the atmosphere can therefore be affected by the presence of primary agents such as greenhouse gases.
You are very disdainful of the vast amount of highly detailed science which is behind global warming theory. This has been derived from a number of different directions, including the basic physics of the materials involved and observations of prior behaviour. Take a look at http://www.grida.no/climate/ipcc_tar/wg1/index.htm for the detailed science. Also try looking at the VAST amount of activity on the web in debating and analysing global warming. This addresses repeatedly the claims made by sceptics which are very well covered by the science behind the theory. And yet again and again people trot out these pet objections which have long been consigned to history through debate.
One highly significant point that sceptics always ignore is that the current speed of change of global temperatures is unprecedented and therefore impossible to explain through purely natural causes. Corresponding to this rate of change, the only factor that is changing at a similar fast pace is greenhouse gas concentrations, which we know as a fact are being caused by humans. We are already "off the graph" and entering uncharted territory which should concern every responsible person who isn't totally brainwashed by the neo-con theories of personal liberty at all costs.
Ironically, although you claim that Governments are hell bent on taking control over everything and that they are therefore the root of current global warming theory, in practice most governments, and certainly our own here in the UK, have done practically nothing to control or even influence our behaviour in this respect. So it is very hard to see any connection unless you really are an incredibly paranoid conspiracy theorist. Or, in your own words, a moron.