ИСТИНА

Based on multitemporal satellite imagery, analysis of coastal morphology and shoreline position change in the 20th-21st century was done for the whole length of the continental Kara Sea coastline. We took modern high resolution imagery of the 2010s-2020s, and archive declassified Corona satellite images from the 1960s to classify coasts based on their morhodynamic type, on the one hand, and modern dynamics (for the last 50 years). The results show that thermoabrasional and thermodenudational coasts prevail, making together 46% of the whole coastline. Laida, lagoon and deltaic low coasts make about a third of it (30%), while accumulative beaches make 19% and rocky shores make 6% of the coastline. In the last decades, most of the coasts remained relatively stable (60%), only 3% of them experienced accumulation, and 37% were eroded, including thermoabrasional coasts, but also part of the previously accumulative coasts. Our results show that morphodynamic types of coasts do not always reflect the modern shoreline changes, and there has been increased erosion on the Kara Sea coasts in the last several decades.