Related by context. Frequent words. (Click for all words.) 57 Little Ice Age 56 glaciation 53 greenhouse warming 53 species extinctions 50 warmer winters 50 atmospheric circulation 50 volcanism 48 atmospheric carbon dioxide 48 El Ninos 48 sunspot activity 48 mid latitudes 47 Warmer temperatures 47 Medieval Warm Period 46 temperatures 46 atmospheric CO2 46 stratospheric ozone 46 warmer temperatures 46 temperate regions 46 substorms 46 ENSO 46 auroral 46 climatic 46 Greenland glaciers 46 heatwaves 45 atmospheric concentrations 45 nighttime temperatures 45 CO2 concentrations 45 oscillation 45 climatological 45 Mild temperatures 45 glacial 44 melting permafrost 44 equatorial Pacific 44 glacial melt 44 La Niña 44 La Nina 44 Greenland ice 44 greenhouse gas concentrations 44 ozone depletion 44 El Nino 44 decadal 43 Severe drought 43 subduction 43 equatorial regions 43 minima 43 icecap 43 temperate zones 43 precipitation 43 Colder weather 43 Southerly winds 43 NSIDC 43 mass extinction 43 El Niño 43 seismicity 43 mass extinctions 43 Holocene 43 volcanic eruptions 43 glaciers 43 oscillations 43 permafrost 42 milder winters 42 coral bleaching 42 North Atlantic Oscillation 42 mountain glaciers 42 Serreze 42 extinctions 42 albedo 42 droughts 42 crustal 42 cyclic 42 upwelling 42 sunspots 42 prolonged 42 Colder temperatures 42 desiccation 42 glacier melt 42 southeastward 42 polar 42 #.#C [002] 42 degree Fahrenheit 42 shrinking glaciers 42 lithosphere 42 Greenland Ice 42 megafauna 42 ocean currents 42 Droughts 42 monsoonal 42 polar regions 41 evapotranspiration 41 degrees Fahrenheit 41 El Nino phenomenon 41 wetter 41 perturbation 41 Computer simulations 41 boreal 41 tropics 41 Pleistocene 41 polar caps 41 oxygen depletion 41 inversions 41 ° C