title: Cyclical structure and the prerequisites for forecasting of the duration of Arctic invasions for the next decade
abstract: The Duration of Arctic Invasions (DAI) is known to be connected with various climatological indexes. This paper presents the results of a study of DAI changes in various sectors of the Northern Hemisphere from 1899 to 2017. To this end, we used the classification of circulating mechanisms of the Northern Hemisphere by B.L. Dzerdzeevsky. The basic attention was paid to the study of the trend component of the temporal variability of the duration of Arctic invasions; to the assessment of long-perio
journal: Arctic and Antarctic Research