Related by context. Frequent words. (Click for all words.) 68 Arctic Oscillation 64 North Atlantic Oscillation 55 equatorial Pacific Ocean 53 La Nina 51 La Niña 51 El Nino warming 51 sunspot cycle 49 sunspot activity 49 ENSO 49 mid latitudes 48 oscillation 48 greenhouse warming 48 El Nino 48 atmospheric circulation 47 El Nino phenomenon 47 equatorial Pacific 47 hydrological cycle 46 radiative forcing 46 geomagnetic storm 45 Jet Stream 45 El Niño phenomenon 45 El Niño 44 Serreze 44 monsoon rainfall 44 geomagnetic field 44 albedo 43 storminess 43 cyclonic circulation 43 geomagnetic 43 atmospheric CO 43 X ray emission 42 El Ninos 42 glacial melting 42 polar 42 volcanism 42 troposphere 42 anticyclone 41 convective 41 atmospheric 41 temperature gradient 41 Little Ice Age 41 Iapetus 41 oscillations 41 Younger Dryas 41 equatorial 41 ozone depletion 41 Sunspots 41 Humid 40 Sunspot 40 upwelling 40 coronal mass ejection 40 ionospheric 40 water vapor 40 thermosphere 40 Permafrost 40 glacial melt 40 Ocean acidification 40 weather 40 Hurricane Felicia 40 westerlies 40 monsoon trough 40 cirrus clouds 40 jet stream 39 glaciation 39 colder 39 northeasterly winds 39 precip 39 Wind shear 39 interglacial period 39 arctic 39 warmer temperatures 39 southerly 39 sinusoidal 39 Humidity 39 Southerly winds 39 auroral 39 atmospheric CO2 39 geomagnetic storms 39 temperatures 39 Temperature 39 Landsea 39 perturbation 39 hotter summers 39 temperate regions 39 monsoons 38 Medieval Warm Period 38 aerosol particles 38 lithosphere 38 westerly winds 38 ionosphere 38 continental crust 38 crustal 38 precipitation 38 La Nina weather 38 tropics 38 Saturn moon Enceladus 38 convection 38 temperature 38 Patzert 38 equatorial regions 38 climatic