ИСТИНА

Barents and Kara seas have great economic importance for Russian Federation. In their water area fishing and productions of hydrocarbons are developed. The Northern Sea Route passes through these seas. Rather warm Norwegian Sea and cold areas of the Arctic basin have impact on climate of these seas. The trajectories of the movement of the North Atlantic cyclones are going east and the northeast deep into the Arctic area, passing through the basins of the Barents and Kara seas, and thus resulting in big variability of weather conditions, especially the wind. The wind is characterized by frequent repeatability of the high speeds which are quite dangerous to water crafts, offshore installations and coastal buildings. Repeatability of sea disturbance increases at a strong wind with the reduction of the sea ice area in the Arctic. That increases danger of the coastal erosion. Long-term planning of different types of activities in the Arctic assumes understanding of the current processes that lead to the development of extreme phenomena, and climatic forecasting of possibility of the recurrence of these phenomena, especially the dangerous wind speeds. This work contains the analysis of the average wind speed daily maxima (at the height of 10 m, 8 terms per day) during the period of 1950-2012 according to the data of the 20th century reanalysis, NCEP/NCAR. Their distribution functions, long-term variability during the climate changes of the Arctic and the relation of the greatest wind speeds to the synoptic situations that are typical for the storm phenomena in the central regions of the seas for a summer season were also investigated. The assessment of the distribution functions will allow to move on to the repeatability of extreme wind speeds at different climatic scenarios and further climatic forecast of the wind mode for 21st century.