Related by context. Frequent words. (Click for all words.) 66 solar irradiance 60 sunspot cycle 59 sunspot activity 59 mid latitudes 59 radiative forcing 58 atmospheric methane 57 equatorial regions 57 irradiance 57 -# degrees Fahrenheit [002] 57 interglacial period 56 Pacific Decadal Oscillation 56 polar caps 56 poleward 56 visible wavelengths 56 circular orbit 55 elliptical orbit 55 solar nebula 55 atmospheric CO 55 sunspot numbers 55 planet orbits 55 solar corona 55 #.#C [004] 55 atmospheric circulation 55 hydrological cycle 55 decadal 55 CO2 concentrations 55 interplanetary spacecraft 55 lithosphere 55 latitudinal 55 cryosphere 54 greenhouse warming 54 scarps 54 insolation 54 orbits 54 glacial melt 54 X ray emission 54 radioactive decay 54 Venusian 54 ecliptic 54 equinoxes 54 microlensing 54 albedo 53 geomagnetic field 53 perigee 53 aerosol particles 53 auroral 53 icecaps 53 -# degrees Celsius [001] 53 magnetic reconnection 53 solstices 53 radial velocity 53 equatorial Pacific Ocean 53 dynamical 53 atmospheric CO2 53 earths 53 innermost planet 53 super Earths 53 cosmic ray 53 geomagnetic 52 ionospheric 52 temperature gradient 52 sunspots 52 occultation 52 planetary 52 stratospheric ozone 52 Little Ice Age 52 radiative 52 latitudes 52 thermosphere 52 magnetosphere 52 oscillations 52 Medieval Warm Period 52 ICESat 52 Jupiter moons 52 substorms 52 moon Europa 52 angular momentum 51 isotopic composition 51 GOCE 51 Polar Regions 51 precession 51 atmospheric carbon dioxide 51 Cabeus crater 51 greenhouse gas concentrations 51 astronomical observations 51 meteoroid 51 extrasolar planet 51 Cosmic rays 51 planetoid 51 glaciation 51 oscillation 51 -# ° C [001] 51 atmospheric 51 sunspot 51 troposphere 51 atmospheric concentrations 51 polar 51 cirrus clouds 51 crustal 51 glacial melting 51 climatic