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Climatic Change

, Volume 58, Issue 3, pp 267–331 | Cite as

Metrics of Climate Change: Assessing Radiative Forcing and Emission Indices

  • Jan S. Fuglestvedt
  • Terje K. Berntsen
  • Odd Godal
  • Robert Sausen
  • Keith P. Shine
  • Tora Skodvin
Article

Abstract

In this paper, we review existing and alternative metrics of climate change, with particular emphasis on radiative forcing and global warming potentials (GWPs), in terms of their scientific performance. Radiative forcing is assessed in terms of questions such as the utility of the concept, uncertainties and sensitivity to key assumptions. The assessment of emission indices focuses on the climate and other resulting impacts (end points) against which emissions are weighted; the extent to which (and how) time dependence is included, with regard to both emission control and impact; how cost issues are dealt with; and the sensitivity of the metrics to various assumptions. It is concluded that the radiative forcing concept is a robust and useful metric of the potential climatic impact of various agents and that there are prospects for improvement by weighing different forcings according to their effectiveness. We also find that although the GWP concept is associated with serious shortcomings, it retains advantages over any of the proposed alternatives in terms of political feasibility. Alternative metrics, however, make a significant contribution to addressing important issues, and this contribution should be taken into account in the further development of refined metrics of climate change.

Keywords

Climate Change Time Dependence Global Warming Significant Contribution Global Warming Potential 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Kluwer Academic Publishers 2003

Authors and Affiliations

  • Jan S. Fuglestvedt
    • 1
  • Terje K. Berntsen
    • 1
  • Odd Godal
    • 1
    • 2
  • Robert Sausen
    • 3
  • Keith P. Shine
    • 4
  • Tora Skodvin
    • 1
    • 5
  1. 1.CICERO – Center for International Climate and Environmental Research – OsloOsloNorway
  2. 2.Department of EconomicsUniversity of BergenNorway
  3. 3.DLR-Institut für Physik der AtmosphäreOberpfaffenhofen, WesslingGermany
  4. 4.Department of MeteorologyUniversity of ReadingReadingU.K
  5. 5.Department of Political ScienceUniversity of OsloNorway

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