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Josh Bovill 18/06/09




Outline climate change and present arguments for and against the scientific evidence for
global warming and its effects.

Global warming is the increase in the average temperature of the Earth's nearsurface air and
oceans since the mid20th century and its projected continuation.
Global surface temperature increased during…

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Josh Bovill 18/06/09




effect was discovered by Joseph Fourier in 1824, first reliably experimented on by John
Tyndall in 1858, and first reported quantitatively by Svante Arrhenius in 1896.
In the absence of the greenhouse effect and an atmosphere, the Earth's average surface
temperature of 14 °C could be as…

Page 3

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Josh Bovill 18/06/09




a 17member team led by Ben Santer noted errors in the Douglass study, and found instead
that the models and observations were not statistically different.
Not all effects of global warming are accurately predicted by the climate models used by the
IPCC. For example, observed Arctic shrinkage…

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