Figure : fig8-18

Time Evolution of Forcings

Figure 2.6

University of Washington Seattle
Sarah Doherty

This figure appears in chapter 2 of the Climate Science Special Report: The Fourth National Climate Assessment: Volume I report.

Time evolution in effective radiative forcings (ERFs) across the industrial era for anthropogenic and natural forcing mechanisms. The terms contributing to cumulative totals of positive and negative ERF are shown with colored regions. The terms are labeled in order on the right-hand side with positive ERFs above the zero line and negative ERFs below the zero line. The forcings from black-carbon-on-snow and contrail terms are grouped together into a single term in the plot. Also shown are the cumulative sum of all forcings (Total; black dashed line) and of anthropogenic-only forcings (Total Anthropogenic; red dashed line). Uncertainties in 2011 ERF values are shown in the original figure (Myhre et al. 2013,6c7c285c-8606-41fe-bf93-100d80f1d17a Figure 8-18). See the Intergovernmental Panel on Climate Change Fifth Assessment Report (IPCC AR5) Supplementary Material Table 8.SM.86c7c285c-8606-41fe-bf93-100d80f1d17a for further information on the forcing time evolutions. Forcing numbers are provided in Annex II of IPCC AR5. The total anthropogenic forcing was 0.57 (0.29 to 0.85) W/m2 in 1950, 1.25 (0.64 to 1.86) W/m2 in 1980, and 2.29 (1.13 to 3.33) W/m2 in 2011. (Figure source: Myhre et al. 2013,6c7c285c-8606-41fe-bf93-100d80f1d17a Figure 8-18; © IPCC, used with permission).

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This figure was created on September 12, 2016.

This figure was submitted on September 11, 2017.

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