Related by context. Frequent words. (Click for all words.) 55 Svalbard 45 permafrost 43 Longyearbyen 42 Spitsbergen 39 Arctic Circle 38 Permafrost 37 Qinghai Tibet Plateau 37 Arctic Ocean 37 Noah Ark 36 Kola Peninsula 35 polar regions 35 gas hydrates 35 Antarctic 35 musk oxen 35 tundra 35 geological formations 35 Antarctica 35 depository 35 GenBank 35 glacier 34 biodiversity hotspots 34 Arctic 34 polar ice 34 repository 34 peat bog 33 glaciers 33 Sakhalin Island 33 seafloor 33 glacial ice 33 Arctic seabed 33 boreal 33 biosphere 33 repositories 33 Antartica 33 Lake Baikal 33 Bering Strait 32 atmospheric carbon dioxide 32 musk ox 32 melting ice 32 dinosaur fossil 32 Melting ice 32 western Siberia 32 Glaciers 31 North Pole 31 arctic 31 peatlands 31 lodgepole pine 31 NSIDC 31 boreal forest 31 Kamchatka 31 Noah ark 31 polar 31 melting permafrost 31 Tromsoe 30 boreal forests 30 gigatons 30 Antarctic Peninsula 30 sedimentary rock 30 melting glaciers 30 Murmansk 30 geologic formations 30 woolly mammoths 30 peatland 30 basalt 30 Arctic tundra 30 peat bogs 30 Antarctic ice 30 storehouse 30 Ellesmere Island 30 fjord 30 paleontological 29 Greenland ice 29 Hadow 29 Galápagos 29 Ice Age 29 mountain glaciers 29 Barents Sea 29 glacial lakes 29 regolith 29 Kiruna 29 pikas 29 Sleipner 29 Martian surface 29 Norway 29 Serreze 29 olivine 29 centralized repository 29 Bergen Norway 28 seabed 28 Tanana River 28 carbon sinks 28 seamounts 28 ecosystems 28 Rovaniemi 28 woodland caribou 28 species extinctions 28 CO2 concentrations 28 glaciation 28 geologic 28 subsurface 28 glacial melt