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Global Warming - Controversy

  • Date Submitted: 08/01/2011 01:06 AM
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For scientific and political disputes, see Global warming controversy, Scientific opinion on climate change and Public opinion on climate change.
For past climate change see Paleoclimatology and Geologic temperature record. For the Sonny Rollins album see Global Warming (album).

Global mean land-ocean temperature change from 1880-2010, relative to the 1951-1980 mean. The black line is the annual mean and the red line is the 5-year running mean. The green bars show uncertainty estimates. Source: NASA GISS

The map shows the 10-year average (2000-2009) global mean temperature anomaly relative to the 1951-1980 mean. The largest temperature increases are in the Arctic and the Antarctic Peninsula. Source: NASA Earth Observatory [1]

Fossil fuel related CO2 emissions compared to five of IPCC's emissions scenarios. The dips are related to global recessions. Data from IPCC SRES scenarios; Data spreadsheet included with International Energy Agency's "CO2 Emissions from Fuel Combustion 2010 - Highlights"; andSupplemental IEA data. Image source:Skeptical Science
Global warming is the continuing rise in the average temperature of Earth's atmosphere and oceans. Global warming is caused by increased concentrations of greenhouse gases in the atmosphere, resulting from human activities such as deforestation and burning of fossil fuels.[2][3] This finding is recognized by the national science academies of all the major industrialized countries and is not disputed by any scientific body of national or international standing.[4][5][A]
The instrumental temperature record shows that the average global surface temperature increased by 0.74 °C (1.33 °F) during the 20th century.[6] Climate model projections are summarized in the Fourth Assessment Report (AR4) by the Intergovernmental Panel on Climate Change (IPCC). They indicate that during the 21st century the global surface temperature is likely to rise a further 1.5 to 1.9 °C (2.7 to 3.4 °F) for their lowest emissions...

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