Global emission reductions through a sectoral intensity target scheme

Abstract

If dangerous climatic change is to be avoided, all countries will need to contribute to reductions in greenhouse gas emissions on the basis of equity and in accordance with their common but differentiated responsibilities and respective capabiiities. This articie discusses the gap between the past (ideai) modei analysis for emission reductions and reaiistic policies. A key requirement for successfui policies is their acceptance by as many countries as possibie and their ease of practical implementation. The sectoral intensity approach has been proposed for its focus on tangible, practical actions; however, its emission reduction effects have been said to be ambiguous and difficult to evaluate quantitativeiy. The effects of global emission reduction based upon a sectoral approach to energy and carbon intensity targets are evaiuated using an energy systems model with a high regionai resolution and a detailed description of technology. This anaiysis found that deep emission cuts can be achieved by a sectorai approach, provided that deveioped and deveioping countries coiiaborate towards emission cuts under the proposed framework. This framework has a higher potentiai for agreement by both developed and developing countries. Si le changement clitnatique dangereux peut être évité, tous les pays devront oontribuer à la réduction des émissions de gaz à effet de serre sur la base du principe de l'équité et en accord avec leur responsabilités communes mais différenciées et leurs capacités respectives. Ce papier discute de l'écart entre l'analyse sur l'ancien modèle (idéal) de réduction des émissions et ies politiques réalistes. Une exigence clé pour ie succès des politiques est leur reconnaissance par le plus grand nombre de pays possible et leur facilité de mise en place en pratique. L'approche sectorielle d'intensité a éié proposée pour son axe sur des actions tangibles et concrètes, cependant ses effets en terme de réductions en émissions ont été interprétés comme étant ambigus et difficiles à évaluer de manière quantitative. L'effet des réductions des émissions mondiales basée sur une approche sectorielle d'objectifs d'intensité en énergie ou en carbone est évalué à travers un modèle de systèmes énergétiques à haute résolution régionaie et une description technologique détaillée. Cette analyse montre que d'importantes réductions d'émissions peuvent être réaiisées par une approche sectorielle à condition que les pays développés et les pays en développement collaborent dans le but de réduire les émissions à l'intérieur du cadre proposé. Ce cadre présente un plus fort potentiei d'accord entre pays développés et pays en développement. eiaritihsicain Global emission reductions through a sectoral intensity target scheme 847 CLIMATE POLICY • I S48 Akimoto et ai.

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