Carmen Bunzl - Universidad Pontificia Comillas

Chapter 3. Implications of future climate regime architectures 146
There are substantial differences between the impacts of different approaches
in the different non-Annex I regions (for Annex I countries the impact of
different approaches was similar, being the most demanding the Multistage
approach, generally followed by CDC, C&C 2050 and Triptych).
For 2020, in regions with very low emissions per capita (such as Africa, India
or South Asia), emission allowances between approaches differ much more
than in other regions; because of their later participation under a multistage
scenario, and therefore much more space left under this approach. C&C by 2050
and CDC’s emission allowances are similar; the most demanding approach
would be the Tryptich approach, may because of their inefficiencies and coal-
intensive industry.
On the other hand, for China (CPAsia), in 2020 the most demanding
approach is CDC (because of their relative high emissions per capita), followed
by C&C and the Multistage approach. The most permissive approaches are the
sectoral based ones, such as Triptych and the Sectoral approach.
Differences between the various approaches are larger for most developing
countries, because they make different assumptions on their participation. The
Triptych approach, with the parameters used here, may be demanding for coal-
intensive countries that in other approaches would not have participated, e.g.
India (South Asia). For other countries that need to participate in all
approaches, such as countries in the rest of Eastern Europe (REEU) and the
Middle East (ME), the levels across approaches are again more uniform as they
are for Annex I countries.
2.2.2 550 ppmv CO2eq.
Under a higher stabilization scenario, the level of effort required for both
Annex-I and non-Annex I regions would be lower. Figure 6 provides the change
in emissions from 1990 to 2020 and 2050 aiming at 550 ppmv CO2eq.
concentration for each region according to the various approaches.
Escuela Técnica Superior de Ingeniería ICAI Carmen Bunzl Boulet Junio 2008