Related by context. Frequent words. (Click for all words.) 66 Little Ice Age 50 atmospheric CO2 48 Holocene 48 degrees warmer 47 #.#C [002] 47 climatologists 47 glaciers 46 anthropogenic 46 ozone depletion 46 greenhouse gas concentrations 45 mass extinctions 45 atmospheric carbon dioxide 45 climate 45 temperatures 45 climatology 45 Arctic 45 sunspots 44 Ice Age 44 polar regions 44 permafrost 44 volcanism 44 albedo 44 Climategate 44 boreal 44 Antarctica 43 latitudes 43 climatic 43 IPCC 43 ° C 43 º C 43 glacial ice 43 polar 42 plate tectonics 42 arctic 42 degrees Centigrade 42 Pleistocene 42 heatwaves 42 Greenland 42 Greenland ice 42 tropics 42 warmer 41 Northern Hemisphere 41 Global Warming 41 warmer temperatures 41 El Niño 41 Antarctic Peninsula 41 sunspot 41 troposphere 41 coldest winter 41 Droughts 41 PETM 41 climatologist 41 polar ice 41 mass extinction 41 degree Fahrenheit 41 degrees Fahrenheit 41 Lomborg 41 global warming skeptics 41 epochs 40 temperate 40 El Nino 40 glacial 40 Glaciers 40 warming 40 Trenberth 40 global warming 40 paleo 40 cold winters 40 meltwater 40 climatic conditions 40 coldest 40 winters 40 warmest 40 temperature 40 colder 40 Antarctic ice 40 CRU 40 World Meteorological Organization 39 volcanic eruptions 39 La Niña 39 biosphere 39 northern latitudes 39 mild winters 39 melting glaciers 39 precipitation 39 La Nina 39 Spitsbergen 39 degrees centigrade 39 cold snap 39 World Meteorological Organisation 39 Arctic Circle 39 Martian 39 atmospheric 39 degree Celsius 39 degrees Celsius 39 deg C 39 Global warming 39 extinctions 38 wetter 38 daytime temperatures 38 snowpacks