Related by context. Frequent words. (Click for all words.) 66 sunspot activity 61 albedo 60 X ray emission 59 greenhouse gas concentrations 59 sunspots 59 atmospheric circulation 58 decadal 58 greenhouse warming 58 mid latitudes 57 atmospheric CO2 57 geomagnetic field 56 ENSO 56 CO2 concentrations 56 atmospheric carbon dioxide 55 dynamical 55 sunspot 55 radiative 54 geomagnetic 54 polar caps 54 volcanism 54 El Ninos 54 infrared wavelengths 54 anthropogenic 54 climatological 54 polar regions 53 atmospheric 53 atmospheric concentrations 53 water vapor 53 ozone depletion 53 glacial melt 53 Sunspots 53 equatorial regions 53 cosmic ray 53 Medieval Warm Period 52 glaciation 52 isotopic 52 ionosphere 52 Little Ice Age 52 troposphere 52 geomagnetic storms 51 oscillation 51 latitudes 51 astrophysical 51 temperature gradient 51 evapotranspiration 51 equinoxes 51 magnetosphere 51 abundances 51 icecap 51 species extinctions 51 NSIDC 50 temperate regions 50 periodicity 50 reflectivity 50 gravitational lensing 50 variability 50 anthropogenic climate 50 nitrogen fixation 50 streamflow 50 anisotropy 50 reflectance 50 ICESat 50 fluxes 49 XMM Newton 49 lunar eclipses 49 infrared radiation 49 convective 49 maxima 49 oscillations 49 atmospheric chemistry 49 gravitational wave 49 redshift 49 Holocene 49 ultraviolet radiation 48 tropical cyclones 48 HD #b [002] 48 cosmic rays 48 astronomical observations 48 extrasolar planets 48 volcanic activity 48 polar 48 occultation 48 perturbations 48 lake sediments 48 climatic conditions 48 MODIS 48 vertical wind shear 48 magnetic fields 48 Geminids 48 Serreze 48 climate 48 Climatologists 48 sediment cores 47 heliosphere 47 GRBs 47 crustal 47 World Meteorological Organisation 47 aurora 47 geomagnetic storm 47 Greenland Ice 47 temperature