There Is No Evidence

[GaryC 7]

No, I won't post the entire 18 pages of his article. I do invite you to read it though.

There Is No Evidence

Dr David Evans (david.evans@sciencespeak.com)

16 June 2009

Last minor revision 1 July 2009

Web address: http://sciencespeak.com/NoEvidence.pdf

Introduction

Let’s break down the case for human-caused global warming logically:

1) There is plenty of evidence that global warming has been occurring recently.

2) There is ample evidence that carbon emissions causes warming and that the level of atmospheric carbon dioxide is increasing.

3) But there is no evidence that carbon dioxide emissions are the main cause of the recent global warming.

The alarmists focus you entirely on the first two points, to distract you from the third. The public is increasingly aware of this misdirection.

Yes, every emitted molecule of carbon dioxide (CO2) causes some warming—but the crucial question is how much warming do the CO2 emissions cause? If atmospheric CO2 levels doubled, would temperatures rise by 0.1°, 1.0°, or by 10.0° C?

We go through the usual ―evidence‖ offered by alarmists, and show that in each case either it:

Is not evidence about what causes global warming. Proof that global warming occurred is not proof that CO2 was mainly responsible.

Is not empirical evidence; that is, it is not independent of theory. In particular models are theory, not evidence.

Says nothing about how much the temperature would rise for a given rise in CO2 levels.

Despite spending $50bn over the last 20 years looking for evidence of point (3) above, the alarmists have found none. In two instances they expected to find it, but in both cases they found only evidence of the opposite—and they have kept awfully quiet about those cases. If they just had some evidence of (3) they could just tell us what it was—and end the debate.

We note that there used to be some supporting evidence, but better data later reversed that evidence. Instead there are now at least three independent pieces of evidence that the temperature rises predicted by the IPCC due to carbon dioxide emissions are exaggerated by a factor of between 2 and 10, primarily due to the assumption of overly positive water vapor feedback in the climate models. Finally, we discuss some examples of what would constitute evidence.

http://sciencespeak.com/NoEvidence.pdf