Spitsbergen is the largest and only permanently populated island of the Svalbard archipelago in Norway. Constituting the western-most bulk of the archipelago, it borders Arctic Ocean, the Norwegian Sea and the Greenland Sea. Spitsbergen covers an area of 39,044 km2 (15,075 sq mi), making it the largest island in Norway and the 36th-largest in the world. The island features an Arctic climate, although with significantly higher temperatures than other areas at the same latitude. The flora takes advantage of the long period of midnight sun to compensate for the polar night. Svalbard is a breeding ground for many seabirds, and also features polar bears, reindeer and marine mammals. Six national parks protect the largely untouched, yet fragile, nature. The island features many glaciers, mountains and fjords.