Related by context. Frequent words. (Click for all words.) 58 greenhouse warming 57 atmospheric CO2 56 atmospheric carbon dioxide 56 University Lamont Doherty 56 glacial melt 56 glacial melting 55 Nature Geoscience 55 CO2 concentrations 55 Serreze 55 ocean acidity 54 atmospheric CO 54 icecaps 54 gigatonnes 54 hydrological cycle 53 journal Geophysical Research 53 Amstrup 53 interglacial period 53 extinctions 53 ocean acidification 53 species extinctions 52 Landsea 52 Meehl 52 terrestrial ecosystems 52 greenhouse gas concentrations 52 Overpeck 52 journal Nature Geoscience 52 Diffenbaugh 51 atmospheric chemistry 51 Pielke 51 aerosol particles 51 acidification 51 glaciation 51 volcanism 51 Younger Dryas 51 Greenland glaciers 51 glaciers melt 51 Greenland ice 50 Climate Impact Assessment 50 Poinar 50 mass extinction 50 British Antarctic Survey 50 atmospheric circulation 50 mass extinctions 50 interglacial 50 anthropogenic climate 50 theoretical calculations 49 polar caps 49 gigatons 49 radiative forcing 49 anthropogenic 49 journal Geology 49 Lindzen 49 glaciers 49 Scambos 49 glacier melt 49 planetary scientist 49 Ocean acidification 49 ozone depletion 49 Takle 48 sediment cores 48 continental drift 48 Palumbi 48 atmospheric concentrations 48 mountain glaciers 48 hotter summers 48 biogeochemistry 48 Mark Serreze 48 methane hydrates 48 geochemist 48 oceans 48 Geophysical Research 48 marine sediments 48 microfossils 48 nitrogen fixation 48 glaciers melting 47 geological sciences 47 subtropical regions 47 Lamont Doherty Earth 47 glaciologist 47 climatologists 47 USGS scientist 47 stratospheric ozone 47 preindustrial levels 47 melting permafrost 47 decadal 47 oxygen isotopes 47 Trenberth 47 plant physiologist 47 Medieval Warm Period 47 geomorphology 47 A'Hearn 46 geoscientist 46 atmospheric sciences 46 NSIDC 46 Atmospheric Research 46 Antarctic ice 46 plate tectonics 46 sunspot activity 46 Scripps Institution 46 Greenland Ice 46 Finnish Meteorological