Suchergebnisse

This article presents the regional emission targets corresponding to different climate regimes for differentiating commitments beyond 2012 on the basis of the Multi-Stage approach. This approach assumes a gradual increase in the number of Parties involved & their level of commitment according to participation & differentiation rules. The analysis focuses on two global greenhouse gas emission profiles resulting in CO2-equivalent concentrations stabilising at 550 & 650 ppmv in 2100 & 2150, respectively. Three Multi-Stage cases have been developed in order to assess different types of thresholds. These share three consecutive stages representing different commitments: stage 1 -- no quantitative commitments; stage 2 -- emission-limitation targets & stage 3 -- emission reduction targets. The analysis shows that by 2025 all three cases result in emission reduction objectives for all Annex I regions of at least 30-55% below their 1990 levels for 550 ppmv, whereas for 650 ppmv target they range from 0 to 20%. Furthermore, early participation is required of the major non-Annex I regions through emission limitation targets i.e. before 2025 & 2050 for the 550 & 650 ppmv targets, respectively. The first participation threshold for adopting emission-limitation targets on the basis of a capability-responsibility index (as introduced here) can provide for a balanced & timely participation of non-Annex I regions. Major strengths & weaknesses of the climate regimes are discussed & important obstacles & pre-conditions for their feasibility & acceptability are highlighted. Tables, Figures, Appendixes, References. Adapted from the source document.