Figure : 1700-years-of-global-temp

1,700 Years of Global Temperature Change

Figure -.2

U.S. Global Change Research Program
Matthew Dzaugis

This figure appears in chapter appendix-5-frequently-asked-questions of the Impacts, Risks, and Adaptation in the United States: The Fourth National Climate Assessment, Volume II report.

Average global temperature has increased rapidly over the last 1,700 years compared to the 1961–1990 average. The red line shows temperature data based on surface observations. The black line shows temperature data from proxies, including data from tree rings, ice cores, corals, and marine sediments. The comparison of proxy- and thermometer-based records suggests that temperatures are now higher than they have been in at least 1,700 years. The steep portion of the graph since about 1950 shows how rapidly temperature has increased compared to previous changes. Source: adapted from Mann et al. 2008.ade3fd09-603e-4fae-b252-1a4142392ea0

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This figure was created on June 13, 2017.

This figure was submitted on December 03, 2018.

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