From his blog http://www.drroyspencer.com/ which I’m repeating here to help get wide exposure.
A Challenge to the Climate Research Community
I’ve been picking up a lot of chatter in the last few days about the ’settled science’ of global warming. What most people don’t realize is that the vast majority of published research on the topic simply assumes that warming is manmade. It in no way “proves” it.
If the science really is that settled, then this challenge should be easy:
Show me one peer-reviewed paper that has ruled out natural, internal climate cycles as the cause of most of the recent warming in the thermometer record.
Studies that have suggested that an increase in the total output of the sun cannot be blamed, do not count…the sun is an external driver. I’m talking about natural, internal variability.
The fact is that the ‘null hypothesis’ of global warming has never been rejected: That natural climate variability can explain everything we see in the climate system.