Carmen Bunzl - Universidad Pontificia Comillas

Chapter 2. Options for future climate change architectures 63
countries’ per capita emissions converge and that developing countries do the
same but delayed in time and conditional to developed country action.
2.1.2.4 Global Tryptich
Description
This approach was originally developed at the University if Utrech (Blok et
al. 1997) to share emission allowances of the first commitment period of the
Kyoto Protocol within the EU; it has been extended since then (Höhne 2006; den
Elzen et al., 2007).
The Tryptich approach describes a way to allocate national emission targets
(element 3) based on sectoral considerations (bottom-up). It is a method to share
emission allowances among a group of countries (element 2); the method as
such does not define which countries should participate (element 1).
The approach was originally based on three broad categories of emissions:
the power sector or electricity production, the group of energy-intensive
industries or industrial production, and the domestic sectors. The choice of
these categories is to take into account national circumstances such as
differences in standard of living, in fuel mix for the generation of electricity, in
economic structure. It was later extended to include all greenhouse gas
emissions of all sectors.
The emissions of the sectors are treated differently: for electricity and
industrial production, growth in physical production – the need for economic
development - is assumed together with an improvement in production
efficiency. For the domestic sectors, convergence of per capita emissions is
assumed - due to a convergence of the standard of living and a reduction in
existing differences in energy efficiency. For the remaining sectors similar rules
are applied.
For each of the sectors, an emission allowance is calculated, using the
national data, but the same Tryptich parameters for all the countries; these are
Escuela Técnica Superior de Ingeniería ICAI Carmen Bunzl Boulet Junio 2008