The Triptych approach revisited: A staged sectoral approach for climate mitigation

Abstract

The Triptych approach is a method for allocating future greenhouse gas emission reductions under a future international climate agreement among countries based on technological criteria at the sector level, and accounting for structural differences. The approach presented here is a refinement of earlier work in terms of increased transparency and allowing delayed participation for developing countries. The analysis presents the emission reductions at the level of countries for three sets of triptych parameters (slow, medium and strong scenario) that stabilize greenhouse gas concentrations at 450, 550 and 650 ppm CO₂-eq., respectively. The reductions are ambitious but nonetheless compatible with existing technical reduction potentials as growth is allowed but energy efficiency and emission intensity has to be improved.