Related by context. Frequent words. (Click for all words.) 57 melting permafrost 53 shrinking glaciers 53 greenhouse warming 52 hotter summers 52 permafrost 52 hydrological cycle 50 terrestrial ecosystems 50 species extinctions 49 Serreze 49 ocean acidity 48 glacial melt 48 melting glaciers 48 ozone depletion 48 glacier melt 47 mountain glaciers 47 Global warming 46 Ocean acidification 46 anthropogenic climate 46 meltwater 46 El Ninos 46 Greenland glaciers 46 icecap 46 atmospheric concentrations 46 polar regions 46 ice melts 46 methane hydrates 45 Arctic Ocean 45 melting ice 45 glaciers 45 Arctic 45 Greenland ice 45 warmer winters 45 Tibetan Plateau 44 volcanism 44 Greenland Ice 44 habitat fragmentation 44 anthropogenic 44 methane 44 snow melt 44 boreal forests 44 ecological degradation 44 stratospheric ozone 44 atmospheric CO2 44 floods droughts 44 ocean acidification 44 boreal 43 subtropics 43 droughts 43 Arctic tundra 43 tundra 43 Southerly winds 43 acidification 43 melting Arctic 43 oxygen depletion 43 frequent droughts 43 salinity 43 Droughts 43 mid latitudes 43 water vapor 42 polar caps 42 eutrophication 42 polar ice 42 impacts 42 landmasses 42 Antarctic peninsula 42 subtropical regions 42 freshwater ecosystems 42 tectonics 42 equatorial regions 42 atmospheric circulation 42 melting polar 42 equatorial Pacific 42 warmer temperatures 42 albedo 42 glacier 42 protective ozone layer 42 temperature gradient 41 glacial lakes 41 latitudes 41 crustal 41 glacial ice 41 gigatonnes 41 gas hydrates 41 overhunting 41 Volcanic eruptions 41 global warming 41 polar bear populations 41 Melting ice 41 arctic 41 coastal erosion 41 Severe drought 41 snowpacks 41 polar bear habitat 41 Qinghai Tibet Plateau 41 aerosol particles 41 Little Ice Age 41 temperate regions 41 heatwaves 41 peat bogs 41 Antarctica 41 polar bears