Related by context. Frequent words. (Click for all words.) 58 Serreze 52 melting permafrost 51 Pielke 49 glaciers 49 Greenland glaciers 48 polar caps 48 Steve Squyres 48 melting polar 48 anthropogenic climate 48 Greenland ice 48 glacial melt 47 mountain glaciers 47 glacier melt 47 Landsea 47 Kevin Trenberth 47 greenhouse warming 46 polar regions 46 glacier 46 NSIDC 46 Revkin 45 glacial ice 45 melting glaciers 45 polar ice 44 icecap 44 Antarctica 44 Tibetan Plateau 44 A'Hearn 44 melting ice 44 oceans 44 Pachauri 44 Arctic Ocean 44 Julie Gerberding 44 meltwater 44 ocean acidification 44 Arctic 43 ICESat 43 Ocean acidification 43 Antarctic Peninsula 43 climate change 43 manmade global warming 43 atmospheric carbon dioxide 43 global warming 43 polar 43 mid latitudes 43 albedo 43 Antarctic 43 Bjorn Lomborg 43 Antarctic ice 43 Hadow 43 Saturn moon Enceladus 43 permafrost 43 species extinctions 43 Lomborg 42 Patzert 42 ocean ecosystems 42 Lindzen 42 floe 42 Earth magnetosphere 42 IPY 42 David Attenborough 42 boreal forest 42 glaciologist 42 Trenberth 42 glaciologists 42 boreal 42 Iapetus 42 Arctic tundra 42 atmospheric CO2 42 British Antarctic Survey 41 climatologists 41 icebergs 41 Overpeck 41 ice melts 41 climatological 41 boreal forests 41 LCROSS 40 melting Arctic 40 mass extinctions 40 atmospheric circulation 40 Achim Steiner 40 El Ninos 40 Nature Geoscience 40 glacial lakes 40 Martian arctic 40 climatology 40 Solar Dynamics 40 journal Nature Geoscience 40 Lubchenco 40 magnetosphere 40 Phil Plait 40 Greenland Ice 40 ocean 40 Klaus Toepfer 40 ejecta 40 Antarctic peninsula 40 troposphere 40 Peter Diamandis 40 ecosystems 40 seamounts 40 biosphere 40 stratospheric ozone