The first step in the fight against climate change is to predict what future climate conditions will be. In this regard, the IPCC has been using GCM-General Circulation Models under different scenarios to regularly produce climate trend projections.

The GCM spatial resolution is hundreds of kilometres and does not allow for regional heterogeneities. Generating climate scenarios with an adequate spatial resolution is the initial step required to improve climate change awareness and advance in identifying and assessing impacts, weaknesses and possible adaptation channels. Models that achieve a resolution of 0.11º (around 12x12 km²) are used in Europe.

The regionalisation process, as part of the Klimatek projects, embraced the "High Resolution Regional Climate Change Scenarios for the Basque Country" study, thanks to which the following has been obtained:

• A climate atlas (daily data from 1971-2015) with spatial high resolution (1km x 1km) and basic variables (precipitation, average temperatures, maximum temperature and minimum temperature)
• Climate change scenarios for the 21st century (2011-2040, 2041-2070, 2071-2100), with spatial high resolution (1km x 1km) generated for the RCP4.5 and RCP8.5 experiments, using RCM simulations as part of the Euro-CORDEX project.

The atlas and the scenarios provide useful data for the territory and sector analysis of the impacts of climate change in the Basque Country.

Previous lower spatial resolution studies indicated significant variations of basic climate variables.