I teach many subjects online as an online teacher since 2009, and when I was teaching World Geography a while back I found the term rainshadow. This means that if there are mountains near the coast, the rain will fall on the coastal side but not much rain will fall on the land side of the mountain. The rainshadow is the place where there is no rain, just like a sunshadow is where the sun does not reach.
Maybe I wil change my psedonym to Sunshadow. . .