Related by context. Frequent words. (Click for all words.) 69 tropospheric 68 solar irradiance 63 polar vortex 62 irradiance 61 sunspot cycle 60 sunspot activity 60 insolation 60 atmospheric methane 60 X ray emission 59 solar corona 59 aerosol particles 59 hydrological cycle 58 geomagnetic 58 ionospheric 58 atmospheric CO 58 sunspot numbers 58 electron density 58 radiative forcing 57 thermosphere 57 auroral 57 geomagnetic field 57 temperature gradient 56 phytoplankton blooms 56 nonlinearity 56 albedo 56 biogeochemical 56 solar nebula 56 periodicity 55 atmospheric 55 isotopic composition 55 atmospheric circulation 55 photoluminescence 55 El Niños 55 anisotropy 54 oscillations 54 isotropic 54 mid latitudes 54 paleoclimate 54 eastern equatorial Pacific 54 Cosmic rays 54 isotope ratios 53 aurorae 53 interstellar medium 53 ionosphere 53 atmospheric turbulence 53 cirrus 53 upwellings 53 magnetic reconnection 53 cosmic ray 53 SSTs 53 airflows 53 terrestrial ecosystems 53 hydrothermal activity 53 photometry 53 atmospheric chemistry 53 troposphere 53 redshifts 53 Earth magnetosphere 53 magmas 53 ultraviolet wavelengths 53 elemental composition 53 mesosphere 52 cosmic rays 52 abundances 52 Sunspots 52 phonon 52 keV 52 variability 52 bandgap 52 poleward 52 geoid 52 interplanetary spacecraft 52 radiative 52 explosive eruptions 52 temperature inversions 52 adiabatic 52 decadal 52 cirrus clouds 52 occultation 52 Antarctic ozone 52 ENSO 52 -# degrees Fahrenheit [002] 52 sunspot 52 convective 52 seismicity 52 Oort Cloud 52 gravitational lensing 51 galaxy formation 51 numerical simulations 51 dynamical 51 emissivity 51 perturbations 51 glacial melt 51 oxygen isotopes 51 Pacific Decadal Oscillation 51 nitrogen fixation 51 pulsations 51 atmospheric concentrations 51 Gamma rays 51 dewpoint 51 amplitudes