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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 elected to focus on a comparison between the observed temperatures and those projected to have occurred under Hansen’s (in his words) “business-as-usual” (BAU) scenario. Remember, this was in 1998. There was no worldwide treaty reducing carbon dioxide emissions (indeed, there isn’t one now). The only change to BAU that took place in the 1988 to 1998 time period was the Montreal Protocol limiting the emissions of CFCs. Reductions in production began only in 1994 and the radiative effect of the Protocol by 1998 was infinitesimal. To me, BAU means BAU. One of the main points that I was making in my 1998 testimony was that observations indicated that the global temperature were rising much less than Hansen had forecast under BAU, which is what happened. "
"How much it will warm in the future is a function of how sensitive the atmosphere is to doubling atmospheric carbon dioxide. There are a number of independent arguments now coming together showing that this value may have been overestimated."
"There were two periods of warming, the first from about 1910 through 1945, and the second from the mid-1970s to the late-1990s. They were both roughly the same magnitude...the first one was long before we put the majority of fossil carbon into the atmosphere"
"There were two periods of warming, the first from about 1910 through 1945, and the second from the mid-1970s to the late-1990s. They were both roughly the same magnitude."
"This section then ends with “it’s not getting warmer [expletive]“. That depends on your time frame. If you choose to look at the last 15 years, it’s not B.S."
"Judith Lean and David Rind, two scientists of Gore’s preference, recently calculated the contribution of a standard sunspot cycle to climate...Nicola Scafetta from Duke thinks the solar contribution may be three times larger."