Related by context. Frequent words. (Click for all words.) 64 cirrus clouds 60 cirrus 60 cumulus clouds 60 polar vortex 57 tropospheric 57 mesosphere 56 convective 56 visible wavelengths 55 aerosol particles 55 ultraviolet wavelengths 55 noctilucent clouds 55 ionospheric 54 cumulus 54 water vapor 54 temperature gradient 54 solar corona 54 reddish hue 53 iridescence 53 albedo 53 sunbeams 53 ionosphere 53 electron density 53 atmospheric turbulence 53 interferometric 53 wavelike 53 auroral 53 radiometer 52 ionised 52 cm -1 52 poleward 52 X ray emission 52 diffraction pattern 52 terahertz radiation 52 striations 52 phytoplankton blooms 51 inversion layer 51 troposphere 51 irradiance 51 thunderclouds 51 phonon 51 ejecta 51 radiative 51 upwellings 51 whorls 51 Cosmic rays 51 mid latitudes 51 photoluminescence 51 pinkish red 51 temperature inversions 51 icy crust 51 shorter wavelengths 51 vortices 50 equatorial 50 phosphorescence 50 substorm 50 Ultraviolet radiation 50 refraction 50 latitudinal 50 zinc oxide nanowires 50 Gamma rays 50 MODIS 50 surface roughness 50 reflectance 50 reflectivity 50 ridges 50 comet tail 49 atmospheric 49 anisotropy 49 contrails 49 temperature inversion 49 aurorae 49 Olympus Mons 49 sunrays 49 absorbance 49 supercell 49 photometer 49 airflows 49 thermosphere 49 Fig. 1A 49 X ray beam 49 solar irradiance 49 cosmic microwave background 49 coronal 49 accretion disk 49 interferometry 49 infrared radiation 49 yellowish brown 49 WASP #b 49 polar caps 49 lithosphere 49 photometry 49 corona 49 ecliptic 49 infrared imagery 48 chemtrails 48 ellipse 48 wavelets 48 salt crystals 48 torus 48 magnetic flux 48 volcanic plume