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ADAM's Modeling Comparison Project - Intentions and Prospects

Ottmar Edenhofer , Brigitte Knopf, Marian Leimbach and Nico Bauer

Year: 2010
Volume: Volume 31
Number: Special Issue
DOI: 10.5547/ISSN0195-6574-EJ-Vol31-NoSI-1
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Abstract:
Despite of the failure of the Copenhagen Summit in December 2009 the world will move forward with plans to limit greenhouse gas emissions much more aggressively than before. The Copenhagen Accord makes reference to the 2�C target as a potential goal for global climate protection. Moreover, it indicates that this goal will be evaluated by 2015 including a consideration of strengthening the long-term goal, referencing various matters presented by science. It seems that the scientific debate on the feasibility of a high chance of achieving the 2�C target will become important over the next few years. It is open to debate as to which extent such a low stabilization target can technically be achieved and at what costs. Therefore, a good understanding of all the major mitigation cost projections is of the utmost importance.



The Economics of Low Stabilization: Model Comparison of Mitigation Strategies and Costs

Ottmar Edenhofer , Brigitte Knopf, Terry Barker, Lavinia Baumstark, Elie Bellevrat, Bertrand Chateau, Patrick Criqui, Morna Isaac, Alban Kitous, Socrates Kypreos, Marian Leimbach, Kai Lessmann, Bertrand Magne, Serban Scrieciu, Hal Turton, Detlef P. van Vuuren

Year: 2010
Volume: Volume 31
Number: Special Issue
DOI: 10.5547/ISSN0195-6574-EJ-Vol31-NoSI-2
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Abstract:
This study gives a synthesis of a model comparison assessing the technological feasibility and economic consequences of achieving greenhouse gas concentration targets that are sufficiently low to keep the increase in global mean temperature below 2 degrees Celsius above pre-industrial levels. All five global energy-environment-economy models show that achieving low greenhouse gas concentration targets is technically feasible and economically viable. The ranking of the importance of individual technology options is robust across models. For the lowest stabilization target (400 ppm CO2 eq), the use of bio-energy in combination with CCS plays a crucial role, and biomass potential dominates the cost of reaching this target. Without CCS or the considerable extension of renewables the 400 ppm CO2 eq target is not achievable. Across the models, estimated aggregate costs up to 2100 are below 0.8% global GDP for 550 ppm CO2 eq stabilization and below 2.5% for the 400 ppm CO2 eq pathway.



Managing the Low-Carbon Transition - From Model Results to Policies

Brigitte Knopf, Ottmar Edenhofer, Christian Flachsland, Marcel T. J. Kok, Hermann Lotze-Campen, Gunnar Luderer, Alexander Popp, Detlef P. van Vuuren

Year: 2010
Volume: Volume 31
Number: Special Issue
DOI: 10.5547/ISSN0195-6574-EJ-Vol31-NoSI-9
View Abstract

Abstract:
Model analysis within the ADAM project has shown that achieving low greenhouse gas concentration levels, e.g. at 400ppm CO2-eq, is technologically feasible at costs of a few percent of GDP. However, models simplify the dynamics involved in implementing climate policy and the results depend on critical model assumptions such as global participation in climate policy and full availability of current and newly evolving technologies. The design of a low stabilization policy regime in the real world depends on factors that can only be partly covered by models. In this context, the paper reflects on limits of the integrated assessment models used to explore climate policy and addresses the issues of (i) how global participation might be achieved, (ii) which kind of options are available to induce deep GHG reductions inside and outside the energy sector, and (iii) which risks and which co-benefits of mitigation options are not assessed by the models.





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