Related by context. Frequent words. (Click for all words.) 52 atmospheric chemistry 52 climatologists 52 terrestrial ecosystems 52 climatological 50 geomorphology 50 interglacial period 50 oxygen isotopes 49 oceanographers 49 scientists 49 glaciologists 49 Computer simulations 49 glaciation 48 Medieval Warm Period 48 climatology 48 researchers 48 greenhouse warming 48 volcanism 47 Climatologists 47 lake sediments 47 polar regions 47 marine sediments 47 sunspot activity 47 mass extinctions 47 isotopic 47 CO2 concentrations 47 glacial melt 47 interglacial 46 sunspot cycle 46 geomagnetic 46 polar caps 46 hydrological cycle 46 albedo 46 astrobiologists 45 radiocarbon 45 sediment cores 45 ozone depletion 45 astrophysical 45 mid latitudes 45 lithosphere 45 geological sciences 45 Greenland glaciers 45 University Lamont Doherty 45 atmospheric CO2 45 CloudSat 45 stratospheric ozone 45 Meridiani 45 evolutionary biologists 45 numerical simulations 45 geologic 45 Tibetan Plateau 45 nitrogen fixation 44 THEMIS 44 NSIDC 44 ICESat 44 hydrological 44 geologically active 44 mountain glaciers 44 Little Ice Age 44 tectonics 44 hydrologic 44 Ordovician 44 atmospheric carbon dioxide 44 streamflow 44 atmospheric CO 44 aerosol particles 44 lavas 44 computer simulations 44 abundances 44 anthropogenic climate 44 crustal 44 glaciers 44 megafauna 43 atmospheric circulation 43 Nature Geoscience 43 ENSO 43 retreating glaciers 43 species extinctions 43 sunspots 43 polar 43 Pliocene 43 oceanic 43 paleo 43 melting permafrost 43 methane hydrates 43 volcanically active 43 dynamical 43 cirrus clouds 43 geoscientist 43 evapotranspiration 43 moon Europa 43 continental drift 43 journal Geology 43 continental crust 43 anthropogenic 43 Geochemistry 43 glacial melting 43 microfossils 42 Quaternary 42 troposphere 42 equatorial regions 42 permafrost