Related by context. Frequent words. (Click for all words.) 61 latitudes 59 equatorial regions 59 polar vortex 58 temperate zones 58 temperate regions 58 insolation 57 subtropical regions 57 tropics 56 El Niños 56 northern latitudes 56 poleward 55 ultraviolet wavelengths 55 substorm 55 tropospheric 55 equator 55 Gamma rays 55 phytoplankton blooms 55 mid latitudes 55 subtropics 55 temperate forests 55 landmasses 54 noctilucent clouds 54 mesosphere 54 equatorial 54 Ultraviolet radiation 54 troposphere 54 Anopheles 53 Cosmic rays 53 solar irradiance 53 heavily cratered 53 atmospheric methane 53 visible wavelengths 53 tropical climates 52 radiative forcing 52 hydrothermal vent 52 aerosol particles 52 isotope ratios 52 planktonic 52 upwellings 52 cirrus 52 atmospheric CO 52 geomagnetic field 52 Polar Regions 51 X ray emission 51 degree Centigrade 51 marine iguanas 51 Dry Valleys 51 SSTs 51 subarctic 51 cirrus clouds 51 Olympus Mons 51 magmas 51 lowland forests 51 Solar flares 51 ITCZ 51 terrestrial ecosystems 50 evergreen forests 50 glacial melt 50 geomagnetic 50 lithosphere 50 WASP #b 50 atmospheric turbulence 50 solar corona 50 Saturn moon Enceladus 50 interglacial period 50 angiosperms 50 irradiance 50 atmospheric nitrogen 50 Crab Nebula 50 airflows 49 constellation Leo 49 equatorial Pacific Ocean 49 aurorae 49 convective 49 coronal hole 49 magnetars 49 shallow continental shelf 49 warmer wetter 49 lavas 49 Earth magnetosphere 49 meteorite impacts 49 vertical wind shear 49 Relative humidity 49 eastern equatorial Pacific 49 hydrological cycle 49 decadal 49 meteoroids 49 Migrating birds 49 lowlands 49 El Ninos 49 diatoms 49 humid tropical 49 marine sediments 49 Sperm whales 49 olivine 49 Tibetan Plateau 49 ocean ridges 49 Namib Desert 49 sunspot 49 sunny climates 49 Valles Marineris