Abstract (EN)

Energy security improvement is often presented as a co-benefit of climate policies. This paper evaluates this claim. It investigates whether climate policy would improve energy security, while accounting for the difficulties entailed by the many-faceted nature of the concept and the large uncertainties on the determinants of future energy systems. A multi-dimension analysis grid is used to capture the energy security concept, and a database of scenarios allows us to explore the uncertainty space. The results, focusing on Europe, reveal there is no unequivocal effect of climate policy on all the perspectives of energy security. Moreover, time significantly matters: the impact of climate policies is mixed in the short term and globally good in the medium term.In the long term, there is a risk of degradation of the energy security. Lastly, we examine the robustness of our results to uncertainties on drivers of economic growth, availability of fossil fuels and the potentials and low-carbon technologies, and find that they are sensitive mainly tofossil fuels availability, low carbon technologies in the energy sector and improvements in energy efficiency.