Pushkar V.S., Cherepanova M.V., Tarasova E.V.
Успехи современного естествознания 2018; (9): 78-82
The knowledge of the Russia Arctic and Subarctic regions environment evolution has exceptional role in shaping Russia's strategic national interests. The key task is to establish the natural environment changes and their impact on the accumulation of sediments and minerals. Climate is strong factor leading to the Quarter environment changes. The Subarctic quaternary marine and continental facies with paleoclimatic signals are the key to study nature changes in the past. This also is a key to recognize the influence of regional factors versus to global ones, among which the oceanic component acquires special importance. The interglacial stages in the paleoclimatic rhythmic of the Late Quarter, including the marine isotope stage 5 (MIS-5) have a particular interest too. Changes in the natural environment (climate, sea level) of this time are important too because they can become as analogues in future climatic modeling, including recent warming forced may be by anthropogenic factor. The article discusses the conditions of the formation MIS 5 sediments in two regions with different climatic characteristics. Firstly, it is Chukotka where the cover glaciations were absent, and the glacioisostatic effect was insignificant in estimating sea level fluctuations. Secondly, it is Alaska where the glacioisostatic effect was established. In addition, when the environment changes of two regions are analyzed, the effect of the Beringia Land was taken into account because it forced the Northern Pacific current systems changes.
