Only Human Influence Can Explain Recent Warming

Figure 33.18

This figure appears in chapter 33 of the Climate Change Impacts in the United States: The Third National Climate Assessment report.

http://nca2014.globalchange.gov/report/appendices/climate-science-supplement/graphics/only-human-influence-can-explain-recent

Changes in surface air temperature at the continental and global scales can only be explained by the influence of human activities on climate. The black line depicts the annually averaged observed changes. The blue shading shows climate model simulations that include the effects of natural (solar and volcanic) forcing only. The orange shading shows climate model simulations that include the effects of both natural and human contributions. These analyses demonstrate that the observed changes, both globally and on a continent-by-continent basis, are caused by the influence of human activities on climate. (Figure source: updated from Jones et al. 2013ee56b7fa-1961-49cc-aeea-823510341d5f).

When citing this figure, please reference updated from Jones et al. 2013ee56b7fa-1961-49cc-aeea-823510341d5f.

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This figure was created on October 23, 2013.

This figure was derived from Attribution of observed historical near-surface temperature variations to anthropogenic and natural causes using CMIP5 simulations .

References :

• Attribution of observed historical near-surface temperature variations to anthropogenic and natural causes using CMIP5 simulations (ee56b7fa)

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