Related by context. Frequent words. (Click for all words.) 68 glaciation 67 volcanism 65 Little Ice Age 65 atmospheric circulation 63 atmospheric CO2 62 Holocene 60 greenhouse warming 60 ENSO 59 crustal 59 Pliocene 58 mid latitudes 58 atmospheric carbon dioxide 58 mass extinctions 58 acidification 58 Antarctic ice 57 upwelling 57 plate tectonics 57 subduction 57 Greenland ice 57 extinctions 57 Antarctic Ice 57 decadal 56 tectonics 56 glaciers 56 glacial 56 Eocene 56 Ordovician 56 Tibetan Plateau 55 anthropogenic 55 glacial ice 55 Pleistocene 55 tectonic 55 meltwater 55 speciation 55 mass extinction 55 mountain glaciers 54 oceanic 54 atmospheric concentrations 54 coral bleaching 54 nucleation 53 sediments 53 Antarctic Peninsula 53 permafrost 53 Nature Geoscience 53 ozone depletion 53 geologic 53 climatic 52 greenhouse gas concentrations 52 polar 52 diatoms 52 isotopic 52 seismicity 51 Geophysical Research 51 polar ice 51 troposphere 51 eutrophication 51 Antarctic 51 sedimentary 51 perturbation 50 PETM 50 abundances 50 Cretaceous 50 ocean acidification 50 subduction zones 50 volcanic activity 50 ocean currents 50 dynamical 50 climatological 50 equatorial Pacific 50 radiocarbon 49 sunspot 49 glacier 49 latitudes 49 Antarctica 49 IPY 49 polar regions 49 oxygenation 49 Triassic 49 melting 49 volcanic eruptions 49 perturbations 49 Precambrian 49 biosphere 49 oscillation 49 landforms 49 albedo 49 hydrothermal 48 fluxes 48 salinity 48 eruptive 48 boreal 48 subduction zone 48 phytoplankton 48 Mesozoic 48 Earth crust 48 oxygen depletion 48 paleo 47 journal Nature Geoscience 47 Climatic 47 Paleozoic 47 caldera