When Illuskan immigrants landed in what would be founded into Edessa. They spread the religion of the Asgardian pantheon. By this connection they had formed a new root in the outer planar tree Yggdrasil. From this connection they had modified the climate of their range to match with the biomes of Edinland. Thus the region is magically kept cooler than surrounding nations. Areas that would be tropical rainforests are instead taigas and temperate rainforests.
Arnoc is a tropical continent located entirely within the eastern hemisphere and mostly within the southern hemisphere. With a small portion within the northern hemisphere.