Aleksyutina D.M., Maznev S.V., Belova N.G., Shilova O.S. —
The influence of the permafrost processes upon erosion at the Ural coast of Baydaratskaya Bay, Kara Sea
// Arctic and Antarctica. – 2019. – ¹ 4.
– P. 84 - 96.
DOI: 10.7256/2453-8922.2019.4.31604
URL: https://en.e-notabene.ru/arctic/article_31604.html
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Abstract: The study of coastal dynamics and associated permafrost processes is a relevant issue in connection with the active development at the Russian Arctic coast. In addition to wave and ice effects on the coastal dynamic, the shores composed of permafrost unlithified sediments, permafrost (cryogenic) processes have a significant effect: thermoabrasion, thermodenudation, thermokarst, and linear thermoerosion. The purpose of this study is to quantify the impact of various cryogenic processes upon the coastline retreat rate on a key site at the Ural coast of the Baydaratskaya Bay, Kara Sea. Coastal retreat rates were estimated based on the interpretation of satellite images (QuickBird-2 2005, WorldView-1 2012, WorldView-2 2013, WorldView-2 2016) and field leveling surveys in 2013, 2014, 2015 and 2017 for zones with prevailing exogenous processes. As a result, coastline rates were obtained under the influence of various cryogenic processes. The revealed differences showed a significant contribution of these processes to the coastal dynamics, along with the geological and geomorphological structure and different time-periods. The performed quantitative estimation will allow conducting more substantiated modeling and forecasting for the development of certain sections of the Russian Arctic coast.