Related by context. Frequent words. (Click for all words.) 62 biosphere 57 ecological 54 anthropogenic 53 hydrological cycle 52 atmospheric methane 51 solar irradiance 51 Snowball Earth 51 atmospheric CO 49 terrestrial ecosystems 49 biogeochemical 49 ecologies 49 cryosphere 49 biotic 48 planktonic 48 atmospheric CO2 48 biota 48 dynamical 48 ecosystems 48 atmospheric 48 radiative forcing 48 planetary 48 climate 48 oceanic 47 ecological degradation 47 climatic 47 ecologic 47 polar caps 47 Anthropocene 47 paleoclimate 47 anthropogenic climate 47 biodiversity 47 ecosphere 47 species extinctions 47 perturbations 47 astrophysical 47 nitrogen fixation 47 Polar Regions 46 earths 46 isotopic composition 46 methane hydrate 46 biogenic 46 geomorphology 46 icecaps 46 abiotic 46 atmospheric carbon dioxide 46 earthquakes volcanoes 45 methane hydrates 45 decadal 45 climatological 45 entropy 45 biogeochemistry 45 interrelations 45 entropic 45 biome 45 biophysical 45 marine ecosystems 45 radiative 45 polar 45 habitat fragmentation 45 ocean acidity 45 lunar soil 44 aquatic ecosystem 44 Phytoplankton 44 greenhouse gases GHGs 44 stratospheric ozone 44 foraminifera 44 melting permafrost 44 sociality 44 ecology 44 nonliving 44 temperate forests 44 Arctic permafrost 44 isotopic 44 methanogens 44 humankind 44 aridity 44 ocean ecosystems 44 Melting glaciers 44 interplanetary spacecraft 44 climatically 44 Earth 44 glacial melt 44 anoxic 44 greenhouse warming 44 Antarctic ozone 44 boreal 44 carbon sinks 44 anthropocentric 44 glacial melting 44 atmospheric chemistry 44 climate change 43 CO2 sequestration 43 cosmic 43 primordial 43 Ecological Footprint 43 evapotranspiration 43 TEEB 43 marine sediments 43 magmas 43 co2 43 climate modelers