Related by context. Frequent words. (Click for all words.) 74 Greenland ice 71 Antarctic ice 71 melting ice 68 glaciers 63 Arctic Ocean 61 polar 61 melting glaciers 60 permafrost 60 glacier 58 Arctic 58 polar regions 58 Antarctica 55 Greenland 55 melting 52 arctic 52 oceans 51 Antarctic Peninsula 50 glacial 50 ice melts 50 Antarctic 49 atmospheric carbon dioxide 49 Glaciers 48 Martian 48 Himalayan glaciers 47 ozone depletion 47 Artic 47 water vapor 47 tundra 46 Martian surface 46 polar bears 46 atmospheric CO2 46 plate tectonics 46 Northwest Passage 46 ice 46 global warming 46 icebergs 45 martian 45 ocean acidification 45 volcanism 45 latitudes 45 ozone layer 44 acidification 44 troposphere 44 North Pole 44 Little Ice Age 44 Arctic Circle 44 oceanic 43 volcanic activity 43 climatologists 43 Ice Age 43 oceanographers 43 ocean currents 43 geologic 42 planet 42 sea 42 subsurface 42 magma 42 extinctions 42 ocean 42 British Antarctic Survey 42 Global warming 42 climatic 42 Melting 41 Earth crust 41 Enceladus 41 Saturn moon 41 tropics 41 Ellesmere Island 41 cosmic rays 41 melt 41 ionosphere 40 Svalbard 40 equator 40 earth crust 40 Bering Sea 40 northern latitudes 40 World Meteorological Organization 40 Bering Strait 40 mass extinction 40 climate change 40 coral reefs 40 atmospheric 40 volcanoes 39 upwelling 39 sediments 39 precipitation 39 equatorial 39 WMO 39 marine ecosystems 39 polar bear 39 warmer temperatures 39 warming 39 planetary 39 ocean depths 39 mountain ranges 39 volcanic eruptions 38 Global Warming 38 Red Planet 38 hydrothermal 38 Aral Sea 38 biosphere