Related by context. Frequent words. (Click for all words.) 66 water vapor 66 ionosphere 58 atmospheric circulation 58 latitudes 56 equator 55 convective 55 interstellar medium 54 magnetosphere 53 Enceladus 53 atmospheric 53 atmospheric CO2 53 polar regions 53 cosmic microwave background 52 albedo 52 convection 52 crustal 52 equatorial Pacific 51 aerosols 51 geosynchronous orbit 51 Earth crust 51 heliosphere 51 Martian atmosphere 51 equatorial 51 cosmic ray 51 earth crust 51 infrared wavelengths 51 infrared radiation 51 jet stream 50 atmospheric chemistry 50 atmospheric carbon dioxide 49 polar 49 redshift 49 greenhouse gas concentrations 49 Saturn rings 49 cosmic rays 49 Tibetan Plateau 49 geomagnetic field 48 elliptical orbit 48 vortices 48 Martian surface 48 ozone depletion 48 Iapetus 48 tropical cyclones 48 greenhouse warming 48 Saturn moon 48 exoplanet 47 volcanism 47 sunspot 47 tropics 47 ringed planet 47 magnetic fields 47 Earth orbit 47 dynamical 47 altitudes 47 phytoplankton 47 ozone 47 Carbon dioxide 47 ocean currents 47 NASA Cassini spacecraft 47 magma 47 wind shear 47 gamma rays 46 eyewall 46 neutron star 46 isotopic 46 ash plume 46 sunspots 46 abundances 46 molten rock 46 orbits 46 Little Ice Age 46 hydroxyl 46 oceanic 46 meltwater 46 gravitational waves 46 subduction zones 46 conductivity 46 supermassive black hole 45 Milky Way galaxy 45 velocities 45 oceans 45 sediments 45 Loop Current 45 lunar surface 45 oxygen atoms 45 oscillations 45 Cassini 45 galaxies 45 millibars 45 Milky Way 45 glaciation 45 northern latitudes 45 moon Titan 45 upwelling 45 pulsar 45 methane 45 Uranus 45 perturbation 45 gamma ray burst 44 comets 44 brown dwarfs