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co2 or sun

23 November 2015
Climate change

At http://joannenova.com.au/2015/11/new-science-20-its-not-co2-so-what-is-t… … is instructive in that it explains why climate scientists do not foresee the Sun playing a role in global warming. This is one of a sequence of posts by Dr David Evans and he says, it is not co2 – but climate scientists say it isn't this fellow.

   They do not think the sun is to blame for global warming and Evans goes on to say why. It is not variation caused by the direct heating of the Earth by the Sun – which has a subtle difference (it avoids the role of the solar wind). The Sun, they say, shines a remarkably steady light – it is a non-variable star (which is different to a lot of stars). Over the last 400 years, they claim, the total solar irradiance has varied by less than 0.2 per cent – a fleabite in the great scheme of things. However, they also have a flea in the bonnet and although they very well may be right about variations in total solar irradiance (TSI) is this the only way the Sun might affect the surface of the Earth. The problem is just that – TSI is the only way they allow the Sun to affect temperatures in their climate models. These models rely on co2 to explain the warming. The Sun is sidelined.

Evans then looks at the albedo effect, and the sun spot cycle, and in this piece avoids CMEs and coronal holes (the latter being one factor in our warm autumn weather). More will follow – but you need to keep looking at the web site to get the full picture of what Evans is proposing.


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