Changes

Sunspot activity may be a primary factor in climate fluctuations, according to Willie Soon, a researcher affiliated with the Harvard-Smithsonian Center for Astrophysics and the Harvard College Observatory. '''“The sun is a great driving force to climate change.”''' Soon said that there have been much greater temperature fluctuations due to sunspots in the past and that proponents of global warming need to consider the effects of sunspot activity on global temperatures. Brian Farrell, a Harvard meteorology professor,  acknowledged a connection between sunspot activity and temperatures on the Earth, “A strong correlation between the amount of radioactive carbon and temperature from ice cores has shown that solar activity can affect temperature." <ref>[http://www.tgdaily.com/content/view/42006/181/ Harvard astrophysicist: Sunspot activity correlates to global climate change] TGDaily.com, April 10, 2009</ref>

Sunspot activity may be a primary factor in climate fluctuations, according to Willie Soon, a researcher affiliated with the Harvard-Smithsonian Center for Astrophysics and the Harvard College Observatory. '''“The sun is a great driving force to climate change.”''' Soon said that there have been much greater temperature fluctuations due to sunspots in the past and that proponents of global warming need to consider the effects of sunspot activity on global temperatures. Brian Farrell, a Harvard meteorology professor,  acknowledged a connection between sunspot activity and temperatures on the Earth, “A strong correlation between the amount of radioactive carbon and temperature from ice cores has shown that solar activity can affect temperature." <ref>[http://www.tgdaily.com/content/view/42006/181/ Harvard astrophysicist: Sunspot activity correlates to global climate change] TGDaily.com, April 10, 2009</ref>

== Claims of "Consensus"==

==Liberal claims of "Consensus"==

[[Richard Lindzen]] wrote in 1992,

[[Richard Lindzen]] wrote in 1992,

The campaign to convince the public (and their elected representatives) that the "science is settled" began in 1988 or 1989.

The campaign to convince the public (and their elected representatives) that the "science is settled" began in 1988 or 1989.

By the 2008 elections both candidates for the Presidency of the United States were proposing plans to mitigate climate change.

By the 2008 elections both candidates for the Presidency of the United States were proposing plans to mitigate climate change.

==Natural Variability of the Climate System==

==Natural Variability of the Climate System==

It is virtually universally accepted amongst climatologists that the earth has experienced numerous [[Ice Age|ice age]]s over two million years, during which global temperatures fluctuated created glacial and inter-glacial periods. The frigid temperatures allowed ice sheets to expand southward, covering much of [[Asia]], [[Europe]], and [[North America]]. The cooling associated with ice ages is gradual, while the terminations are relatively rapid. However, even the rapid terminations of ice ages take centuries to millennia. Most conservatives acknowledge this.

It is virtually universally accepted amongst climatologists that the earth has experienced numerous [[Ice Age|ice age]]s over two million years, during which global temperatures fluctuated created glacial and inter-glacial periods. The frigid temperatures allowed ice sheets to expand southward, covering much of [[Asia]], [[Europe]], and [[North America]]. The cooling associated with ice ages is gradual, while the terminations are relatively rapid. However, even the rapid terminations of ice ages take centuries to millennia.

==Natural Climate Change on Other Planets==

==Natural Climate Change on Other Planets==