  The demand-supply balance of electricity systems is fundamentally linked to
climate conditions. In light of this, the present study aims to model the
effect of climate change on the European electricity system, specifically on
its long-term reliability. A resource adequate power system -- a system where
electricity supply covers demand -- is sensitive to generation capacity, demand
patterns, and the network structure and capacity. Climate change is foreseen to
affect each of these components.
  In this analysis, we focused on two drivers of power system adequacy: the
impact of temperature variations on electricity demand, and of water inflows
changes on hydro generation. Using a post-processing approach, based on results
found in the literature, the inputs of a large-scale electricity market model
covering the European region were modified. The results show that climate
change may decrease total LOLE (Loss of Load Expectation) hours in Europe by
more than 50%, as demand will largely decrease because of a higher temperatures
during winter. We found that the climate change impact on demand tends to
decrease LOLE values, while the climate change effects on hydrological
conditions tend to increase LOLE values.
  The study is built on a limited amount of open-source data and can flexibly
incorporate various sets of assumptions. Outcomes also show the current
difficulties to reliably model the effects of climate change on power system
adequacy. Overall, our presented method displays the relevance of climate
change effects in electricity network studies.
