It is called green because its wet and temperateoceanic climate helps lush pastures and forests thrive, providing a landscape similar to that of Ireland, Great Britain, and the west coast of France. The climate and landscape are determined by the Atlantic Oceanwinds whose moisture gets trapped by the mountains circumventing the Spanish Atlantic façade. Because of the Foehn effect, the southern slopes fall inside the rain shadowzone and so Green Spain contrasts starkly with the Spanish drier central plateau. Conversely, in those brief episodes when the southwestern winds blow through the mountains, the effect reverses, the northern coast gets inside the Foehn winds and is dry and much warmer than the inner plateau, where rain is present. The average precipitation is about 1,200 mm, higher than in most areas in inland central Europe, and wetter than almost anywhere in Spain, a country generally considered dry. Asturias has an average summer temperature of 20-22 °C, being one of the mildest climates in Europe. Most of the rain comes from the Atlantic through Galicia, the western part of Green Spain. Depending on the latitude of entry, this wet air can drop to the south, or more likely stay and run through the north stretch of land, pushed north by the Cantabrian mountains.
Native species
The main native tree species of this biome are beeches and oaks. However, since the second half of the 20th century, in some areas, native forests have been replaced by plantations of eucalyptus and Monterey Pines for its commercial exploitation in the paper industry. The Pyrenees, which sometimes are considered in the same geologic system as the Cantabrian Mountains, were once included in Green Spain, even though the rainfall there has different patterns and the general landscape is more alpine rather than genuinely oceanic.
Image gallery
Image:Lagos de Covadonga3.JPG|The Picos de Europa, Asturias Image:BosqueRedes.jpg|Redes National Park Image:Gaztelugatxe_Connected.jpg|Basque coast. Image:Playa de Berria.JPG|Coast of Cantabria. Image:Cabo Ortegal-Costa Artabra-Galicia-Spain.jpg|Coast of Galicia. Image:Playa de Torimbia.jpg|Coast of Asturias.