adventure alpine alpinism alps altitude change cliff cliffs climate climb climber climbing cold dangerous edge Expedition exploration extreme glacier glaciology global hiking holiday ice ice-flow icy landscape melt melting mountain mountaineer mountaineering mountains nature outdoor recreation ridge risk silhouette snow sport sports terrain tour tourism Trek Trekking warming winter Aerospace Industry Air Vehicle airplane airport blizzard chemical cloud condensation De-Icing defrost fog frost job machine Medicine And Science Mode of Transport Moody Sky moving up occupation overcast repairing sky spray spraying station storm stuck traffic transportation trapped travel Travel Locations waiting weather working flowerpot frozen iced icicle icicled pine plant tree wall current fall fierce flow gully natural norway norwegian powerful rock strong violent water waterfall habitat harsh high lichens low growing odd plants resilient small strange unusual white crag drop forest green