The reduction of 6 glacial centers of Altai in the period from the maximum of the Little
Ice Age to the present has been studied. On average, the area of glaciers has halved, the height of the
feeding boundary hasincreased by 90–200 m. The acceleration in the reduction of most large glaciers
in the studied area in the last 10–20 years has been revealed which was caused by a sharp decrease
in the mass balance since the second half of the 1990s.