Abstract
Impact of climate change on the Ob, Lena and Yenisei runoff is under discussion. Indexes of zonal, meridional and general circulation were used to assess the effect of changes in atmospheric circulation. Correlations between the indexes and surface air temperature, precipitation, atmospheric moisture content in the regions of catchment areas confirmed the influence of atmospheric transport in the cold part of the year. Assessment of the relationship between changes of climatic conditions in the catchment areas and interannual changes of river runoff parameters indicated that annual runoff increases and mostly is affected by increase of average annual precipitation. Frequency of maximum river discharges during climate warming is reduced.
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