Arctic methane emissions permafrost thawing. Near the bottom of the first sinkhole, air contained unusually high concentrations of methane, according to tests conducted by the researchers. This hypothesis points to the destabilization of gas hydrates containing huge amounts of methane gas. According to researchers at Norway's Centre for Arctic Gas Hydrate (CAGE), through a process called geothermal heat flux, the Siberian permafrost which extends to the seabed of the Kara Sea, a section of the Arctic Ocean between the Yamal Peninsula and Novaya Zemlya, is thawing. According to a CAGE researcher, Aleksei Portnov, Methane hydrate is leaking in an area of at least
Novaya Zemlya the west coast was mapped. Henry Hudson was another explorer who passed through Novaya Zemlya while searching for the Northeast Passage. The islands were systematically surveyed by Pyotr Pakhtusov and Avgust Tsivolko during the early 1830s. The first permanent settlement was established in 1870 at Malye Karmakuly, which served as capital of Novaya Zemlya until 1924. Later the administrative center was transferred to Belushya Guba, in 1935 to Lagernoe, but then returned to Belushya Guba. Small numbers of Nenets were resettled to Novaya Zemlya in the 1870s in a bid by Russia to keep out the Norwegians. This population, then