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All IPCC definitions taken from Climate Change 2007: The Physical Science Basis. Working Group I Contribution to the Fourth Assessment Report of the Intergovernmental Panel on Climate Change, Annex I, Glossary, pp. 941-954. Cambridge University Press.
"I think that Climategate is a very unfortunate thing that happened, that the scientists who were involved in that, from what I've read, didn't trust the public, didn't even trust the scientific public. They were not showing the discordant data. That's something that - as a scientist I was trained you always have to show the negative data, the data that disagrees with you, and then make the case that your case is stronger. And they were hiding the data, and a whole discussion of suppressing publications, I thought, was really unfortunate."
"Temperature has been rising over the last 100 years. That's pretty clear. How much is due to varying solar activity and how much due to humans is a scientific issue that we're trying to address."
"The issues that there is strong agreement on is that we have seen global warming over the past 100 years. An issue, though, that isn't really settled yet is how much of that is due to humans? And that's a subject that really can use more investigation."
"Luis Alvarez taught me the fundamental scientific rule, which is you've got to show everybody your dirty laundry...My problem with the way the hockey stick was derived was that there was none of this...if you hide something...the person you are most likely to fool is yourself."
"A quote came out of the emails, these leaked emails, that said "let's use Mike's trick to hide the decline". That's the words, "let's use Mike's trick to hide the decline". Mike is Michael Mann, said "hey, trick just means mathematical trick. That's all." My response is I'm not worried about the word trick. I'm worried about the decline."
"What we know is when it gets warmer carbon dioxide leaves the oceans. When it gets cooler it goes back in. It dissolves better. So carbon dioxide is a result of climate change not a driver of climate change in that period. You can even see this in the delay because when it warms up it takes 800 years before the carbon dioxide comes back out. There's a slight delay that Al Gore never talks about. That old linkage is simply junk science."