Related by context. Frequent words. (Click for all words.) 61 thawing permafrost 61 melting permafrost 61 polar caps 60 icecaps 59 glaciers melt 58 glaciers 57 hydrological cycle 57 terrestrial ecosystems 57 permafrost 56 Melting ice 56 mountain glaciers 56 glacier melt 55 glacial melt 55 Greenland Ice 55 Greenland ice 54 Antarctic ice 54 melting ice 54 icecap 54 methane hydrates 54 species extinctions 54 aerosol particles 54 atmospheric CO 54 melting glaciers 54 stratospheric ozone 53 retreating glaciers 53 polar ice 53 atmospheric carbon dioxide 52 Greenland glaciers 52 greenhouse warming 52 marine sediments 52 atmospheric circulation 52 ocean acidity 52 oceans 52 lithosphere 52 river deltas 51 freshwater ecosystems 51 acidification 51 Volcanic eruptions 51 gigatonnes 51 Antarctic Ice 51 snowpacks 51 volcanic eruptions 51 ocean ecosystems 51 meltwater 50 shrinking glaciers 50 Arctic Ocean 50 hotter summers 50 Ocean acidification 50 atmospheric CO2 50 mid latitudes 50 methane hydrate 50 ice jams 50 continental crust 50 crustal 50 landmasses 50 magma chamber 50 glacial lakes 50 polar regions 50 sediment 50 sediments 49 peat bogs 49 atmospheric concentrations 49 CO2 concentrations 49 ocean currents 49 marine ecosystems 49 volcanic activity 49 floods droughts 49 Permafrost 49 greenhouse gas concentrations 49 icebergs 49 Tibetan Plateau 49 gas hydrates 48 lake sediments 48 aquatic ecosystems 48 ecosystems 48 monsoon rainfall 48 ice melts 48 Weddell Sea 48 snowpack 48 Serreze 48 lavas 48 albedo 48 oceanic crust 48 peatlands 48 water vapor 48 frequent droughts 48 extinctions 47 salinity 47 subsurface 47 glacial till 47 glaciation 47 sulphates 47 volcanic gases 47 soils 47 Arctic 47 glacial 47 gigatons 47 climate 47 refreezing 47 volcanism 47 boreal forests