orographic
/ˌɒrəʊˈgræfɪk/adjective
1- of or relating to mountains, especially as regards their position and form（与）山（有关）的（尤指山的位置和形式）。
1.1
- (of clouds or rainfall) resulting from the effects of mountains in forcing moist air to rise（云, 雨）由山地地形造成的。
词源
orographical adjective.