In this area ice thaws very quickly, because of it sea level grows, the probability of flooding of extensive coastal territories appears worldwide.
And the territory not so small - 400 kilometers in length, 100 kilometers in width. She was already occupied by dark-colored seaweed, the ability of a surface to reflect sunshine has decreased.
Source: http://ren.tv/novosti/2018-04-11/uchenye-pokazali-foto-ugrozhayushchey-chelovechestvu-temnoy-zony