Related by context. Frequent words. (Click for all words.) 64 temperate zones 62 latitudes 60 temperate regions 58 northern latitudes 57 tropics 57 equator 56 subtropics 55 subtropical regions 55 poleward 55 Migrating birds 55 equatorial 54 polar vortex 54 temperate forests 54 equatorial regions 54 mid latitudes 53 latitudinal 53 deciduous forests 52 eastern equatorial Pacific 52 equatorial Pacific Ocean 52 Northern Hemisphere 52 SSTs 51 equinoxes 51 warmer wetter 51 tropospheric 51 Polar Regions 51 drier summers 51 subarctic 50 temperate 50 wintering grounds 50 biogeography 50 lowland 50 planktonic 50 gyre 50 arctic tundra 50 grassy plains 50 Jurassic Period 50 evergreen forests 50 northern hemisphere 50 Weddell Sea 50 landmasses 50 plankton blooms 49 seamount 49 mesosphere 49 hotter summers 49 temperate climates 49 ITCZ 49 terrestrial ecosystems 49 colder winters 49 thermocline 49 coniferous trees 49 lowlands 49 flyways 49 Amazon basin 49 degrees Fahrenheit warmer 49 storminess 49 troposphere 49 upwellings 49 phytoplankton blooms 49 Arctic tundra 49 population densities 49 noctilucent clouds 49 equatorial Pacific 49 glaciated 48 southward migration 48 glaciers melt 48 Late Cretaceous 48 tundra 48 Dry Valleys 48 northward 48 transect 48 Melting glaciers 48 Iberian Peninsula 48 southwestward 48 river deltas 48 tropical climates 48 Beringia 48 insolation 48 cirrus 48 icecap 48 ocean ridges 48 continental crust 48 highlands 48 transects 47 Tibetan Plateau 47 Little Ice Age 47 taxa 47 bird migrations 47 polar 47 glacial melt 47 subtropical 47 lithosphere 47 deglaciation 47 interglacial period 47 migratory paths 47 El Niños 47 flycatchers 47 Medieval Warm Period 47 Pacific Ocean 47 cryosphere 47 migrating waterfowl 47 Qinghai Tibet Plateau