Related by context. Frequent words. (Click for all words.) 65 Solar flares 63 substorm 60 substorms 60 tropospheric 59 Gamma ray bursts 58 geomagnetic storms 58 phytoplankton blooms 58 solar corona 58 meteorite impacts 58 hydrological cycle 57 El Niños 57 magnetic reconnection 57 aerosol particles 57 Ultraviolet radiation 57 polar vortex 56 aurorae 56 atmospheric methane 56 Earth magnetosphere 56 X ray emission 56 noctilucent clouds 56 auroral 55 phenomena 55 volcanism 55 ultraviolet wavelengths 55 sunspot activity 55 solar irradiance 55 WASP #b 55 planetary nebulae 55 GRBs 55 Gamma rays 55 Cosmic rays 55 greenhouse warming 54 Snowball Earth 54 solar nebula 54 solar flares 54 coronal mass ejections 54 geoid 54 supernova explosion 54 magmas 54 clathrates 54 active galactic nuclei 54 terrestrial ecosystems 54 plankton blooms 53 sunspot cycle 53 isotope ratios 53 atmospheric circulation 53 mid latitudes 53 heavily cratered 53 chemtrails 53 meteoroids 53 cosmic ray 53 magnetosphere 53 biogeochemical 53 upwellings 53 polar caps 53 Polar Regions 52 oxygen isotopes 52 glaciations 52 cryosphere 52 microwave radiation 52 interplanetary spacecraft 52 Supernovae 52 abundances 52 oscillations 52 isotopic composition 52 species extinctions 52 Type Ia supernovae 52 radioactive decay 52 supernova explosions 52 elemental composition 52 sexual dimorphism 52 gamma ray burst 52 perturbations 52 atmospheric turbulence 52 Cepheids 52 atmospheric chemistry 51 hydrothermal activity 51 radiative forcing 51 polar regions 51 atmospheric CO 51 Nibiru 51 Earthlike 51 paleoclimate 51 undersea volcanoes 51 volcanic eruptions 51 lithosphere 51 supernova remnants 51 magnetars 51 galaxy formation 51 mass extinctions 51 radial velocity 51 gamma ray bursts 51 glacial melt 51 geomagnetic 51 Eta Carinae 51 phosphorescence 51 stratospheric ozone 51 protoplanetary disk 51 albedo 51 volcanically active 51 cosmic rays