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(Click for frequent words.) 73 Paleocene Eocene Thermal Maximum 70 glaciation 70 glaciations 69 Little Ice Age 68 interglacial period 67 Snowball Earth 67 interglacial 66 Last Glacial Maximum 66 deglaciation 65 interglacial periods 65 Eemian 64 Permian extinction 64 Younger Dryas cold 63 volcanism 63 Cryogenian 63 Pleistocene 63 Ice Ages 63 Permian Triassic 62 Cambrian Explosion 62 Palaeocene Eocene Thermal Maximum 62 Holocene 62 mass extinction 62 geological epoch 61 Holocene epoch 61 Ediacaran 61 Climatic Optimum 61 KT boundary 61 Eocene epoch 60 megafauna 60 warmings 60 Permian Period 60 Pliocene 60 Cambrian explosion 60 Medieval Warming 60 megadrought 60 Medieval Warm Period 59 Neoproterozoic era 59 megadroughts 59 kyr 59 Cretaceous Period 59 Medieval Warming Period 59 Pleistocene era 59 El Niños 59 Cambrian Period 59 Late Ordovician 59 Pleistocene Epoch 59 Toba eruption 59 Chicxulub impact 59 Neogene 59 Pleistocene epoch 59 mass extinctions 59 Late Heavy Bombardment 59 multi decadal 58 interglacials 58 Noachian 58 Cretaceous Tertiary 57 atmospheric methane 57 Cryogenian period 57 Pacific Decadal Oscillation 57 Upper Palaeolithic 57 Cenozoic Era 57 Great Oxidation Event 57 Tertiary Period 57 atmospheric circulation 57 El Niño Southern Oscillation 57 Late Pleistocene 57 Quaternary 57 Neoproterozoic 57 supercontinent 57 Maunder Minimum 57 Interglacial 57 greenhouse warming 57 Anthropocene 57 sunspot activity 57 mya 56 Ordovician 56 Indian Ocean Dipole 56 Cretaceous 56 glacial interglacial 56 paleoclimate 56 Paleozoic Era 56 Pleistocene Ice Age 56 dinosaur extinction 56 mid latitudes 56 Ordovician extinction 56 Late Devonian 56 atmospheric carbon dioxide 56 Permian Triassic boundary 56 glacial cycles 56 KT extinction 56 El Ninos 56 glacial retreat 56 glacial interglacial cycles 56 flood basalts 56 coolings 56 reionization 56 Eocene 56 Quaternary Period 55 marine sediments 55 Jurassic Period 55 Pacific Decadal Oscillation PDO 55 Cretaceous Paleogene 55 atmospheric CO2 levels 55 glaciers receded 55 Hadean 55 Late Cretaceous 55 warm interglacial 55 hydrological cycle 55 Late Triassic 55 supervolcano 55 Atlantic Multidecadal Oscillation 55 Milankovitch 55 substorm 55 Cretaceous Tertiary boundary 55 Oligocene epoch 55 plate tectonics 55 Triassic Period 55 atmospheric CO 55 mid Pliocene 54 meteorite bombardment 54 subglacial lakes 54 faunas 54 El Nio 54 volcanic eruptions 54 hydrothermal activity 54 warm interglacial periods 54 Miocene epoch 54 C4 grasses 54 Southern Oscillation 54 Cenozoic 54 auroral 54 Gondwanaland 54 eruptive activity 54 Paleogene 54 Arctic oscillation 54 ° C warmer 54 Upper Paleolithic 54 Siberian Traps 54 meteorite impacts 54 sunspot cycle 54 megathrust earthquake 54 paleomagnetic 54 Hesperian epoch 54 radiative forcing 54 lavas 53 anomalously warm 53 Cretaceous Paleogene boundary 53 ENSO 53 Chicxulub 53 Dansgaard Oeschger 53 Laurentide Ice Sheet 53 Current Warm Period 53 paleoclimatic 53 iridium layer 53 glaciers melted 53 glaciers retreated 53 multidecadal 53 Pacific decadal oscillation 53 Atlantic Multidecadal Oscillation AMO 53 Mount Tambora 53 magmas 53 supervolcanoes 53 Devonian Period 53 sedimentary layers 53 Ediacaran Period 53 forams 53 midlatitudes 53 mammal extinctions 53 Beringia 53 cryovolcanism 53 Permian Triassic extinction 53 Phanerozoic 53 El Nino Southern Oscillation 53 solar nebula 52 subpolar 52 magnetic reconnection 52 Early Cretaceous 52 Paleocene Eocene 52 Sumatra Andaman earthquake 52 Antarctic ozone 52 Siberian permafrost 52 Laurentide ice sheet 52 Sturtian glaciation 52 rifting 52 polar vortex 52 Paleocene 52 Tambora 52 Precambrian 52 anthropogenic warming 52 Mount Mazama 52 explosive eruptions 52 subglacial 52 poleward 52 mammoths 52 fissure eruption 52 atmospheric CO2 concentration 52 Sr Ca 52 Eocene Epoch 52 SSTs 52 Milankovitch cycles 52 el Nino 52 Mass Extinction 52 tropical troposphere 52 supercontinents 51 Deccan Traps 51 substorms 51 Medieval Warm Period MWP 51 H. habilis 51 atmospheric CO2 51 Cenozoic era 51 ocean basins 51 La Ninas 51 hydrosphere 51 #.#C above 51 mantle plumes 51 geological timescale 51 Maunder minimum 51 Deccan volcanism 51 La Niñas 51 magnetic polarity 51 Medieval Warm 51 permafrost degradation 51 Ice Age 51 #.#C warmer 51 crustal 51 continental drift 51 Cretaceous Tertiary KT 51 Middle Miocene 51 Madden Julian Oscillation 51 sulfur isotope 51 Jakobshavn Isbrae 51 interannual variability 51 Zeebe 51 extinctions 51 degrees Fahrenheit warmer 51 boreal regions 51 cosmic ray flux 51 Mesolithic 51 Gondwana supercontinent 51 Dry Valleys 51 cosmic ray intensity 51 sedimentary deposits 51 Triassic Jurassic 51 Grímsvötn 51 Greenland Ice 50 diatoms 50 atmospheric concentrations 50 tropospheric temperature 50 phytoplankton blooms 50 Gigantopithecus 50 sunspot cycles 50 Carboniferous 50 Pliocene epoch 50 Yellowstone caldera 50 foraminifera 50 Roman Warm Period 50 astronomical alignments 50 supervolcano eruption 50 El Ni 50 Triassic 50 Polar Vortex 50 Great Conveyor Belt 50 oceanic circulation 50 phytoplankton bloom 50 Arctic Oscillation 50 Sturtian 50 equatorial Pacific Ocean 50 Mesozoic era 50 Paleoclimate 50 GRB #B 50 chlorine monoxide 50 tropopause 50 foreshocks 50 magnetic substorms 50 megaquakes 50 phyllosilicates 50 anthropogenic 50 decadal 50 asteroid impacts 50 warmer wetter 50 magma ocean 50 hypoxic zone 50 clathrates 50 ALH# 50 thermal inertia 50 El Niño La Niña 50 Cretaceous periods 50 paleoclimatologists 50 galactic alignment 50 subduction zone earthquake 50 Tharsis Rise 50 anthropogenically 50 axial tilt 50 Coral bleaching 50 isotopic 50 CO2 concentrations 50 solar irradiance 50 magmatism 50 storminess 50 ocean upwelling 50 terrestrial ecosystems 50 El Niño 50 Carboniferous Period 50 upwelling 50 Late Cretaceous Period 49 lithosphere 49 continental crust 49 forcings 49 Eocene Oligocene 49 anthropogenic emissions 49 Magellanic Stream 49 Warmer oceans 49 magmatic 49 avian dinosaurs 49 Keeling Curve 49 Klekociuk 49 meteor impacts 49 chondrules 49 upwellings 49 coccolithophores 49 sediments deposited 49 decadal variability 49 megafauna extinction 49 Neanderthals Homo neanderthalensis 49 carbon dioxide concentrations 49 cryosphere 49 ancient supercontinent 49 volcanic activity 49 Yellowstone supervolcano 49 subduction 49 hominid evolution 49 Type Ia supernova 49 sunspots 49 Late Jurassic 49 volcanic plumes 49 supernova explosion 49 benthic foraminifera 49 climate modellers 49 El Nino warming 49 ocean ridges 49 dromaeosaurs 49 Deccan eruptions 49 sediment cores 49 Tunguska Event 49 Late Paleozoic 49 sunspot 49 Cretaceous Tertiary extinction 49 magnetospheric 49 seafloor sediments 49 metamorphism 48 decadal scale 48 outlet glaciers 48 ocean eddies 48 El Nino La Nina 48 dynamical processes 48 dinosaurs roamed 48 GtC 48 megafaunal 48 palaeoclimate 48 La Niña 48 polar latitudes 48 anoxic 48 humans Homo sapiens 48 primitive organisms 48 sulfate aerosol 48 Neandertals 48 La Niña winters 48 climatic 48 ENSO cycle 48 lunar perigee 48 Otto Bliesner 48 #.#C #.#C 48 Sunspots 48 Velicogna 48 interannual 48 NSIDC 48 supercontinent Pangaea 48 El Nino 48 gamma ray burst 48 Miocene Epoch 48 magnetar 48 Laurasia 48 biogeochemical 48 vertebrate evolution 48 climate modelers 48 radiocarbon 48 mantle convection 48 Appy Sluijs 48 refugia 48 Early Archaic 48 La Nina 48 icesheet 48 glacial melting 48 tectonic activity 48 Middle Pleistocene 48 lake sediments 48 temperature reconstructions 48 paleoenvironmental 48 methane clathrates 48 atmospheric aerosols 48 austral summer 48 ENSO El Nino 48 megathrust quakes 48 geologically active 48 Middle Paleolithic 48 tectonics 48 eruptive 48 calderas 48 Middle Eocene 48 supermoons 48 compressional 48 angiosperms 48 alpine glaciers 48 anthropogenic greenhouse gas 48 Plate Tectonics 48 plankton blooms 48 earliest hominid 48 La Nina pattern 48 Ayles Ice Shelf 48 geologic 48 lunar meteorites 48 superheavy elements 48 Maastrichtian 48 southern latitudes 47 Myr 47 lowermost mantle 47 habilis 47 Tunguska 47 Cretaceous extinction 47 thermohaline circulation 47 stratospheric ozone 47 Cascadia fault 47 #.#C [004] 47 hurricane landfalls 47 multicellular animals 47 speciation 47 el nino 47 ejecta 47 climate forcings 47 glacial 47 Gondwanan 47 seismicity 47 ornithischians 47 oxygen isotope 47 oxygenic photosynthesis 47 Paleoindian 47 Antarctic glacier 47 Homo sapiens 47 megathrust quake 47 multi decadal signal 47 troposphere 47 Svensmark 47 sub glacial lakes 47 biogeographic 47 nitrogen fixation 47 hominid species 47 Flu pandemics 47 depositional 47 polar icecap 47 Surtsey 47 lava flows 47 deep convective clouds 47 lunar crust 47 chondrites 47 species extinctions 47 tectonic 47 ozone depletion 47 equatorial Pacific 47 Palaeozoic 47 climatologically 47 Cumbre Vieja 47 PETM 47 supernova explosions 47 biogeochemical processes 47 Modoki 47 Noachian era 47 severe droughts 47 atmospheric CO2 concentrations 47 Wilkins Ice Shelf 47 basaltic lava 47 Mg Ca 47 YORP effect 47 stromatolite 47 GRB # 47 Gamma ray burst 47 explosive volcanism 47 permafrost 47 Paleozoic 47 temperate regions 47 warmer wetter winters 47 El Nino Modoki 47 exosphere 47 photosynthetic organisms 47 geochemists 47 bonebed 47 hydrothermal 47 microfossils 47 Oligocene 47 planetesimals 47 Mesozoic Era 47 subduction zones 47 Antarctic Ice 47 silicic 47 Quadrantids 47 #.#oC [001] 47 cataclysmic eruption 47 isotope ratios 47 Cascadia subduction zone 47 basaltic rocks 47 Volcanism 47 equatorial waters 47 collisional 47 Bedout 47 Irvingtonian period 47 teleconnections 47 picosecond 47 Volcanic eruptions 47 climatic variability 47 La Nina cooling 47 ferric oxides 47 Shiveluch 47 surface temperatures SSTs 47 Stratospheric ozone 47 megaflood 47 Rossby waves 47 melting glacial 47 amphibian declines 47 Plate tectonics 46 Arctic permafrost 46 basaltic 46 protoplanet 46 Equatorial Pacific 46 lobe finned fishes 46 circumpolar Arctic 46 meteoroid impacts 46 abiogenesis 46 Syrtis Major 46 thrust faulting 46 mud volcanoes 46 hydrologic cycle 46 downwelling 46 Chicxulub crater 46 bolide 46 Neanderthals 46 Yellowstone Caldera 46 oxygen isotopes 46 amplifying feedbacks 46 disappearing glaciers 46 archaea 46 noctilucent clouds 46 planetary nebula 46 Anthropogenic 46 H. sapiens 46 Puijila 46 cyclonic storms 46 electron diffusion 46 Laramidia 46 angiosperm 46 anthropogenic carbon dioxide 46 Zalasiewicz 46 Plio Pleistocene 46 Ontario Lacus 46 Woolly mammoths 46 atmospheric oceanic 46 carbonate minerals 46 Hoerling 46 Kilimanjaro glaciers 46 prokaryotes 46 paleo 46 Burgess Shale 46 crustal thickness 46 sterile neutrino 46 anthropogenic climate 46 multicellular creatures 46 inner moons 46 carbonate globules 46 tectonic earthquakes 46 H. erectus 46 albedo feedback 46 sun corona 46 Bose Einstein condensates 46 cratons 46 Pleistocene Age 46 radar altimetry 46 iceberg calving 46 megathrust 46 seabed sediments 46 Severe droughts 46 albedo 46 midlatitude 46 hominids 46 oxygen isotope ratios 46 Permo Triassic 46 anthropogenic CO2 emissions 46 phreatic 46 harmful algal bloom 46 ppmv 46 isotherms 46 tephra 46 volcanically active 46 periodicities 46 geochronology 46 climatological 46 radiative transfer 46 perturbation 46 permafrost soils 46 Palaeozoic era 46 Chazy Reef 46 atmospheric chemistry 46 permafrost melts 46 paleoclimatology 46 Tambora eruption 46 Mesozoic 46 Brigham Grette 46 glaciers 46 magnetic monopoles 46 bird Archaeopteryx 46 El Niño winters 46 ppbv 46 ocean sediment cores 46 GJ#b 46 subduction zone 46 Antarctic glaciers 46 Alpine glaciers 46 epochs 46 Earth biosphere 46 earliest tetrapods 46 Homo heidelbergensis 46 basalts 46 Proterozoic 46 volcanic tremor 46 Amundsen Sea 46 landmasses 46 zircons 46 desiccation 46 Sheet WAIS 46 scientists theorize 46 coastal upwelling 46 volcanic aerosols 46 Panderichthys 46 faunal 46 subduction earthquake 46 southern supercontinent 46 X ray emission 46 solunar 46 oceanic crust 46 phytoplankton biomass 46 isotopic compositions 46 seismograms 46 Mud volcanoes 45 grabens 45 Sumatran earthquake 45 Noachian period 45 Eyjafjallajökull erupted 45 melting permafrost 45 greenhouse gas concentrations 45 punctuated equilibrium 45 Greenland Antarctica 45 coral bleaching 45 speleothems 45 climatologists 45 geothermal gradient 45 Noctilucent clouds 45 martian atmosphere 45 auroral emissions 45 Extinctions 45 solar corona 45 chlorophyll concentrations 45 solar minima 45 oC 45 post perovskite 45 Yellowstone geysers 45 icy comets 45 La Niña pattern 45 woolly mammoth 45 Archaean 45 evolutionary divergence 45 geoid 45 ostracods 45 advection 45 Cyanobacteria 45 icesheets 45 Wolf Rayet star 45 Krakatoa erupted 45 glacier retreat 45 Arabia Terra 45 tectonic plate movements 45 mountain glaciers 45 La Nià ± 45 animal phyla 45 Homo erectus 45 atmospheric ozone 45 lithospheric 45 Ross Ice Shelf 45 stratovolcano 45 Acanthostega 45 Iapetus 45 Hellas Basin 45 basalt lava 45 heliosheath 45 spatial scales 45 cosmic microwave background 45 afterglows 45 mesospheric 45 tropospheric 45 X ray pulses 45 Homo sapiens evolved 45 mesosphere 45 spiral nebulae 45 Rignot 45 methanogens 45 brachiopods 45 RS Ophiuchi 45 anthropogenic CO 45 anatomically modern 45 altitudinal 45 Ted Scambos 45 igneous rocks 45 retreating glaciers 45 Ozone depletion 45 meridional overturning circulation 45 primate evolution 45 gigatonnes 45 deformational 45 aerosol concentrations 45 gamma ray bursts GRBs 45 GRB# 45 tectonically 45 Dansgaard 45 stratospheric clouds 45 upper troposphere 45 meridional flow 45 biogeochemical cycles 45 Climatic 45 Tycho supernova 45 Nili Fossae 45 SN #gy 45 Laki eruption 45 QQ# 45 NASA QuikScat satellite 45 photoemission 45 Laguna Salada fault 45 yedoma 45 Genyornis 45 Harvati 45 temperature gradients 45 plankton bloom 45 Redoubt Volcano 45 femtoseconds 45 subtropical regions 45 ppm CO2 45 golden toad 45 mega fauna 45 active volcanism 45 climatic variations 45 Greenland icecap 45 phenology 45 structural lineaments 45 auroral displays 45 ENSO neutral conditions 45 Cascadia Subduction Zone 45 Tunguska meteorite 45 martian meteorites 45 dinosaurs 45 Harmful algal blooms 45 glacier calving 45 hominins 45 yr -1 45 Serreze 45 type Ia supernovae 45 multicellular 45 glacial melt 45 Cosmic Microwave Background 45 Hominids 45 tectonic movements 45 stromatolites 45 Oort cloud 45 australopithecines 45 Paleozoic era 45 ocean currents 45 Antarctic Dry Valleys 45 CAIs 45 supercomputer simulations 45 supernovae 45 sauropodomorphs 45 eukaryote 45 icecaps 45 loess 44 sediments 44 equatorial latitudes 44 isotopic composition 44 equatorial 44 Scheila 44 photosphere 44 Omar Baddour 44 SeaWiFS 44 tropical latitudes 44 Ardipithecus ramidus 44 Santorini eruption 44 Substorms 44 Earth radii 44 Greenland ice 44 carbonaceous chondrites 44 electron neutrino 44 placental mammals 44 Jupiter moon Io 44 Dr van Ommen 44 subarctic 44 satellite altimetry 44 auroral activity 44 Seismicity 44 Oetzi 44 glaciers melt 44 benthos 44 Soufriere Hills Volcano 44 abundances 44 Patagonian glaciers 44 Surface Temperature 44 Lake Vostok 44 Corot 7b 44 moonquakes 44 Alfred Wegener 44 Earth crust 44 geological timescales 44 terrestrial vertebrates 44 Paleocene Eocene thermal 44 gamma ray burst GRB 44 Bose Einstein condensation 44 isostatic rebound 44 vegetation greenness 44 lava fountains 44 Pavlof 44 polyploidy 44 glacier melting 44 phenological 44 SST anomalies 44 Saturn moon Mimas 44 atmospheric moisture 44 isotope fractionation 44 methane burps 44 comets 44 methane CH4 44 Lake Untersee 44 infrared spectral 44 rafted debris 44 Norris Geyser Basin 44 temperate zones 44 glacier melts 44 geomagnetic storm 44 Denisovans 44 El Nino periodic 44 southerly latitudes 44 Mt Tarawera 44 coronal heating 44 Zoback 44 Maya civilization 44 komatiitic 44 Chicxulub Crater 44 andesitic rocks 44 biogeographical 44 Landsea 44 geomagnetism 44 Fram Strait 44 Thermus aquaticus 44 eruptive phase 44 Mesoproterozoic 44 Polar Regions 44 spatial variability 44 meteoroid 44 Sinus Meridiani 44 Fertile Crescent 44 subducting plate 44 geomagnetic 44 Greenland icesheet 44 latitudes 44 isotopic signature 44 photoperiod 44 receding glaciers 44 megaquake 44 tundra vegetation 44 Mauna Loa Observatory 44 GRBs 44 Cenomanian 44 smallest exoplanet 44 wrinkle ridges 44 Sauropods 44 cosmic ray 44 Neanderthal extinction 44 carbonyl sulfide 44 magma chambers 44 glaciological 44 Lyrids 44 Paleo Indian 44 polar caps 44 elliptical galaxy 44 olivine 44 GJ #b [001] 44 Eric Rignot 44 geological strata 44 circum Pacific 44 Agulhas Current 44 atmospheric circulations 44 Gliese #c 44 Grimsvötn 44 carbonate sediments 44 sheet Summerhayes 44 palaeo 44 equatorial regions 44 icecap 44 Tiktaalik 44 pliosaur ferocious predator 44 Palaeocene Eocene thermal 44 Homo species 44 Pu'u O'o 44 carbonaceous chondrite 44 thermosphere 44 Droughts 44 #P/Holmes 44 springtime ozone 44 nucleation 44 Atlantic thermohaline circulation 44 anthropogenic aerosols 44 Sedimentary rocks 44 subsurface ocean 44 seiche 44 isoprene 44 brittle deformation 44 paleoecology 44 carbon isotopes 44 upper tropospheric 44 Mount Pinatubo eruption 44 dolomites 44 chytrid 44 proton decay 44 granitoids 44 Leonid meteor 44 sea hydrothermal vents 44 dustier stormier atmosphere 44 spicules 44 aerosol particles 44 sedimentary rock 44 electromagnetic anomaly 44 Rahmstorf 44 anthropogenic greenhouse gases 44 Greenland glacier 44 Type Ia supernovas 44 sulphate aerosols 44 presolar grains 44 WASP #b 44 BLG #Lb 44 eruption 43 Gakkel Ridge 43 phyllosilicate 43 gamma ray bursts 43 Trichodesmium 43 erosional 43 airglow 43 Valles Marineris 43 WMAP satellite 43 caldera 43 anticyclonic 43 sulfate aerosols 43 metazoans 43 trilobites 43 Geminid shower 43 North Atlantic Oscillation 43 cyclicity 43 magnetosphere 43 lactose tolerance 43 anticyclones 43 Archean Expansion 43 periodic oscillations 43 convective storms 43 evolutionary lineage 43 neutrino mass 43 biosignatures 43 Gamburtsev 43 Homo ergaster 43 tropical coral reefs 43 ice nucleation 43 sunspot cluster 43 sulfur isotopes 43 Konrad Steffen 43 Scambos 43 Palaeolithic 43 #.#C #.#F [003] 43 Himalayan Glaciers 43 chromosphere 43 ARkStorm 43 supernova 43 Jakobshavn 43 filamentary structure 43 vesper bats 43 supersymmetric particles 43 Larsen Ice Shelf 43 felsic intrusions 43 NASA Wilkinson Microwave 43 Bose Einstein condensate 43 Paranthropus