Extremely cold summer seasons in the Altai in the XIX-XXth centuries

This work is devoted to the analysis of frequency and features of the cold summer seasons in the Altai during the period from 1800 to 2000. The features and occurrence of cold summer years and periods on high-mountainous belts and on the territory in general are considered. It is shown that most often cold years repeated in the beginning of the XIXth century in all high-rise belts and on all the territory of the Altai. On the territory near glaciers the cold summer of the previous year in separate years negatively affects the formation of the width of tree girdles during the next year.