How does the climate differ between the French and Spanish sides of the Central Pyrenees?

In the Central Pyrenees, the climate differs significantly between the French and Spanish sides, primarily due to a remarkable contrast in humidity.1

To the north, the French side is heavily influenced by oceanic air that penetrates eastward across the plains of Aquitaine, meeting no major obstacles. This creates a more humid environment compared to the southern slopes.1

In contrast, the Spanish side is influenced by the valley of the Ebro, which acts as a "little continent" south of the Central Pyrenees. This region experiences a Mediterranean climate characterized by great thermal contrasts, which are further exaggerated by the high altitude of the Iberian Peninsula. While the French side benefits from the penetration of oceanic influence, the southern side is defined by this distinct, sunny, and continental-like Mediterranean pattern, which is unlike climates found in other parts of Europe.1