Difference between revisions of "Global warming"

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(Described IPCC as 'body of climate change scientists' in intro, as per Chicago Tribute article referenced.)
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'''Global warming''' is the term ascribed to an increase in global average surface temperature.  
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Scientists such as [[Richard Lindzen]] and [[Fred Singer]] say that the patterns of global warming are naturally caused.  
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In February, 2007, the [[Intergovernmental Panel on Climate Change]], a body of climate change scientists<ref>http://www.chicagotribune.com/news/nationworld/chi-0704280477apr29,1,4275902.story?coll=chi-newsnationworld-hed</ref> established by the [[United Nations]], released their fourth assessment report on climate change. That report concluded that recent global climate change was "very likely" caused by human activity, <ref>http://news.bbc.co.uk/2/hi/science/nature/6321351.stm</ref>.
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Politicians who support the [[Kyoto Protocol]] have made the claim that there is a cause and effect relationship between increases in atmospheric concentrations of [[greenhouse gas]]es and air temperature.
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Hansen's group at the Goddard Institute wrote, "Global warming is now 0.6&nbsp;°C [1.0&nbsp;°F] in the past three decades and 0.8&nbsp;°C [1.4&nbsp;°F]in the past century." <ref>http://data.giss.nasa.gov/gistemp/2005/</ref>
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==Natural variability of the climate system==
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The Earth has experienced numerous [[Ice Age|ice age]]s over the past two million years, during which global temperatures dropped approximately 6 degrees Celsius and then returned to normal. 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, which contrasts with the effects predicted for anthropogenic global warming.
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And it's not just the earth that has variations. Since the Viking spacecraft reached Mars in the 1970's until recent readings were taken, the average temperature on Mars has risen 1.1 degrees Fahrenheit just as the average temperature on the earth has risen. Since human industrialization is probably not to blame for the change on Mars, other causes are being considered. The scenario most postulated is dust storms.<ref>http://www.space.com/scienceastronomy/070404_gw_mars.html</ref>
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==Politics of global warming==
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The global average surface temperature warmed about 0.5&nbsp;°C (0.9&nbsp;°F) over the second half of the 20th Century,{{Fact-science}} and to some the warming appears to be related to increases in carbon dioxide and other greenhouse gases. The possibility of adverse consequences has become a major concern for environmentalists.
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Assessments of climate science by the United Nations (see [[IPCC]] - ''Intergovernmental Panel on Climate Change'')
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have claimed that scientists are 90% sure that over 50% of the observed global warming in recent decades is human-caused, and that continued global warming should be expected over at lease the next century. One prominent journal published a literature search by an avowed [[Kyoto Protocol]] supporter claiming a "scientific consensus" overwhelmingly supports the IPCC reports. <ref>http://www.sciencemag.org/cgi/content/full/306/5702/1686]</ref>
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Several prominent scientists have pointed out the [[politicized science]] of the UN's assessment methods. The scientific reports are submitted to a panel of representatives appointed by each country in the IPCC. Several scientists have complained about their work being misrepresented by the U.N.{{Fact}}
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Part of the political motivation for acting on Global Warming may be the fact that there is wide agreement among the American public that Global Warming is a reality. A poll conducted March 11-14 of 2007 found that the majority of the American public (59%) believes we are already seeing the effects of Global Warming, an additional 3% and 8% respectively believe they will see the effects with in a few years or within their lifetime, and 19% believe that Global Warming will be seen, not in their lifetime, but in future generations—only a small minority 8% believe that Global Warming will never happen. <ref>Poling report on Gallup poll for March 11-14, 2007[http://www.pollingreport.com/enviro.htm]</ref>.
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== Scientists ==
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[[Image:Rogerrevelle.jpg|thumb|right|100px|Roger Revelle, Al Gore's mentor.]]
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{|
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| valign="top" width="35%"|
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* [[Roger Revelle]]
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* [[Achim Steiner]]
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* [[Fred Singer]]
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* [[Richard Lindzen]]
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* [[Sallie Baliunas]]
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* [[Lonnie Thompson]]
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| valign="top" width="33%"|
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* [[James E. Hansen]]
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* [[Michael Mann]]
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* [[Charles Keeling]]
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* [[Edwin A. Hernández-Delgado]]
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|}
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==Further Readings==
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*[http://schwinger.harvard.edu/~motl/global-temperature-not-exist.pdf Does a global temperature exist?], ''Journal of Non-Equilibrium Thermodynamics'', June 2007.
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*[http://www.magma.ca/~hurleyp/FightingTheHoax.htm Fighting the Hoax]
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*[http://environment.guardian.co.uk/climatechange/story/0,,2032821,00.html The appliance of science] by Mike Hulme.
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*[http://www.climatecrisis.net/ ''An Inconvenient Truth''], Film by [[Al Gore]]
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*[http://www.physics.harvard.edu/%7Emotl/iris-effect.pdf Climate Sensitivity and Observed Negative Feedbacks], lecture by Richard Lindzen and Roberto Rondanelli.
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*[http://www.physics.harvard.edu/%7Emotl/lindzen-nature-of-arguments.pdf Nature of Arguments for Anthropogenic Global Warming], by Richard Lindzen
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*[http://www.cato.org/pubs/regulation/regv15n2/reg15n2g.html Global Warming: The Origin and Nature of the Alleged Scientific Consensus] - [[Richard S. Lindzen]], Alfred P. Sloan Professor of Meteorology at the [[Massachusetts Institute of Technology]]
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*[http://washingtontimes.com/commentary/20030825-090130-5881r.htm Global warming smear targets]
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*[http://www.ncpa.org/sub/dpd/index.php?Article_ID=2319 The physical evidence of earth's unstoppable 1,500-year climate cycle]
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*[http://www.heartland.org/Article.cfm?artId=17181 Survey Shows Climatologists Are Split on Global Warming]
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*[http://video.google.com/videoplay?docid=4499562022478442170 The Great Global Warming Swindle - Documentary Film]
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==References==
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<references/>
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[[category:earth science]]
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[[category:Liberal Falsehoods]]
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Revision as of 13:40, May 11, 2007

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