This website is the digital version of the 2014 National Climate Assessment, produced in collaboration with the U.S. Global Change Research Program.

For the official version, please refer to the PDF in the downloads section. The downloadable PDF is the official version of the 2014 National Climate Assessment.

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Welcome to the National Climate Assessment

The National Climate Assessment summarizes the impacts of climate change on the United States, now and in the future.

A team of more than 300 experts guided by a 60-member Federal Advisory Committee produced the report, which was extensively reviewed by the public and experts, including federal agencies and a panel of the National Academy of Sciences.

Explore the effects of climate change
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Figure 15.3: Nitrogen Emissions

Nitrogen Emissions

Figure 15.3: Figure shows how climate change will affect U.S. reactive nitrogen emissions, in Teragrams (Tg) CO2 equivalent, on a 20-year (top) and 100-year (bottom) global temperature potential basis. Positive values on the vertical axis depict warming; negative values reflect cooling. The height of the bar denotes the range of uncertainty, and the white line denotes the best estimate. The relative contribution of combustion (dark brown) and agriculture (green) is denoted by the color shading. (Figure source: adapted from Pinder et al. 20121).

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References

  1. Pinder, R., W. Schlesinger, G. Bonan, N. Bettez, T. Greaver, W. Wieder, and E. A. Davidson, 2012: Ch. 3: Impacts of human alteration of the nitrogen cycle in the US on radiative forcing. The Role of Nitrogen in Climate Change and the Impacts of Nitrogen-Climate Interactions on Terrestrial and Aquatic Ecosystems, Agriculture and Human Health in the United States: A Technical Report Submitted to the US National Climate Assessment, E.C. Suddick and E.A. Davidson, Eds., North American Nitrogen Center of the International Nitrogen Initiative (NANC-INI), Woods Hole Research Center, 45-65. URL | Detail

The National Climate Assessment summarizes the impacts of climate change on the United States, now and in the future.

A team of more than 300 experts guided by a 60-member Federal Advisory Committee produced the report, which was extensively reviewed by the public and experts, including federal agencies and a panel of the National Academy of Sciences.

United States Global Change Research Program logo United States Global Change Research Program participating agency logos