Related by context. Frequent words. (Click for all words.) 68 solar irradiance 63 irradiance 60 sunspot cycle 57 radiative forcing 57 sunspot activity 54 #.#C [004] 54 sunspot numbers 54 atmospheric methane 53 aerosol particles 53 ionospheric 53 solar corona 52 solar nebula 52 abundances 52 reflectivity 51 SMOS 51 troposphere 51 albedo 51 radiometer 50 decadal 50 X ray emission 50 reflectance 50 greenhouse gas concentrations 50 water vapor 50 WMAP 50 hydrological cycle 50 -# degrees Celsius [001] 50 redshift 50 isotopic 50 thermosphere 50 amplitudes 50 GeV 49 atmospheric 49 CO2 concentrations 49 greenhouse warming 49 Spectrometer 49 ICESat 49 radiative 49 cosmic rays 49 oxygen isotopes 49 cosmic ray 49 spatial resolution 49 GOCE 49 evapotranspiration 48 sunspots 48 climate modelers 48 mid latitudes 48 geomagnetic field 48 XMM Newton 48 atmospheric CO 48 dewpoint 48 visible wavelengths 48 anisotropy 48 Hubble observations 48 infrared wavelengths 48 luminosity 48 stratospheric ozone 48 atmospheric circulation 48 oscillations 48 atmospheric carbon dioxide 48 spectra 48 COROT 48 planet orbits 48 HD #b [002] 48 photometric 47 gravitational wave 47 temperature gradient 47 equatorial Pacific Ocean 47 -# ° C [001] 47 measurements 47 interferometer 47 interplanetary spacecraft 47 sunspot 47 numerical simulations 47 radar altimeter 47 brown dwarfs 46 geomagnetic storms 46 storminess 46 substorms 46 ionosphere 46 Medieval Warm Period 46 microlensing 46 THEMIS 46 atmospheric CO2 46 transmittance 46 infrared radiation 46 cirrus clouds 46 extrasolar planet 46 spectroscopic 46 ENSO 46 Antarctic ozone 46 shorter wavelengths 46 picosecond 46 cosmic microwave background 46 thermal conductivity 46 quantitative measurements 46 monsoon rainfall 46 quark gluon plasma 46 perigee 46 electrical conductivity 46 supernova remnant 46 El Ninos