Observation station of Laohugou Glacier No. 12, Qilian Mountains, Gansu, China
Laohugou Glacier No. 12 is the largest glacier in the Qilian Mountains. Water from Laohugu and other glaciers in the Qilian Mountains irrigates the Hexi Corridor and was fundamental to the development of oasis cities along the Northern Silk Road. Between 2006 and 2018, it retreated by an average of 13.1 meters/year.