The adequacy of the GWPs and alternative indices for future climate agreements
The Global Warming Potential (GWP) index applied in the Kyoto Protocol to compare emissions of greenhouse gases has been debated and various alternatives have been proposed. In this presentation, we give a brief overview of alternative approaches for the design of metrics whereby emissions of gases with different atmospheric lifetimes and different radiative properties can be compared and weighted. The overview focuses on changes in physical climate and resulting impacts (key parameter) against which emissions are weighted; the extent to which time dependence is included, and the sensitivity to various assumptions. Although the GWP concept is associated with serious shortcomings, it retains advantages over any of the proposed alternatives in terms of applicability in policy making. The development of a post-Kyoto protocol gives new opportunities for evaluating existing concepts and for introducing refinements. It is our contention that choosing the GWP index for future commitment periods represents a particular choice and should not be considered as default. It is possible to build further on the existing GWP concept, possibly by including additional forcing agents (such as tropospheric ozone) and taking into account differences in the climate sensitivity parameter, or move further down the cause effect chain and choose temperature change, rather than (time integrated) radiative forcing, as the key parameter.
Fuglestvedt, Jan S., Keith P. Shine, Terje Berntsen, Odd Godal and Robert Sausen, 2003. The adequacy of the GWPs and alternative indices for future climate agreements. EGS-AGU-EUG Joint Assembly, Nice, France, 06 - 11 April 2003.
- Språk: Engelsk
- Kategori: Konferanseforedrag/postere
- Tittel: The adequacy of the GWPs and alternative indices for future climate agreements
- Konferanse tittel/dato: EGS-AGU-EUG Joint Assembly
- Sted: Nice, France, 06 - 11 April 2003