Barents Sea the Norwegian Sea to the west, and the archipelagos of Svalbard to the northwest, Franz Josef Land to the northeast and Novaya Zemlya to the east. The islands of Novaya Zemlya, an extension of the northern end of the Ural Mountains, separate the Barents Sea from the Kara Sea. Despite being part of the Arctic Ocean, the Barents Sea has been characterized as "turning into the Atlantic" because of its status as "the Arctic warming hot spot." Hydrologic changes due to global warming have led to a reduction in sea ice and in stratification of the water column, which could
Administrative divisions of Arkhangelsk Oblast Administrative divisions of Arkhangelsk Oblast Within the framework of administrative divisions, Arkhangelsk Oblast is divided into six cities and towns of oblast significance, twenty-one districts, and two island territories (Franz Joseph Land and Victoria Island). Besides, Mirny is a town under the federal government management. In terms of the area, the biggest administrative districts are Novaya Zemlya () and Mezensky District (). The smallest one is Solovetsky District. In terms of the population, the biggest administrative district is Velsky District (61,819 in 2002), the smallest ones are Solovetsky District (968), Novaya Zemlya (2716), and Leshukonsky District (10,708). Most of the