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(Click for frequent words.) 62 interglacial 62 deglaciation 62 Younger Dryas 62 interglacial period 60 Pleistocene 59 interglacial periods 59 Noachian 59 Pliocene 58 Little Ice Age 58 Ice Ages 58 Interglacial 58 Quaternary 57 glaciation 57 glaciations 57 kyr 57 Eocene 57 geological epoch 56 Neoproterozoic 56 Upper Palaeolithic 56 Paleocene Eocene Thermal Maximum 55 Medieval Warm Period 55 Eocene epoch 55 Cenozoic 55 interglacials 54 Miocene epoch 54 Last Glacial Maximum 54 volcanism 54 Anthropocene 54 Eemian 54 paleoclimatic 54 Ediacaran Period 54 Late Ordovician 53 Phanerozoic 53 Paleozoic Era 53 Carboniferous 53 Late Devonian 53 Snowball Earth 53 Cretaceous Period 53 Cambrian Period 53 Late Pleistocene 53 Cryogenian 53 Neogene 52 Upper Paleolithic 52 Ordovician 52 Late Jurassic 52 Ediacaran 52 Eocene Epoch 52 glacial interglacial 52 Mesolithic 52 Devonian Period 52 Paleogene 51 Permian Triassic 51 megadroughts 51 atmospheric CO2 concentration 51 Pleistocene epoch 51 Pleistocene Epoch 51 Southern Oscillation 51 Paleozoic 51 Medieval Warming 51 Cenozoic era 51 megadrought 51 atmospheric CO2 51 Pacific Decadal Oscillation 51 Medieval Warm 51 Late Triassic 51 Triassic 51 Roman Warm Period 50 Triassic Period 50 mass extinctions 50 mass extinction 50 atmospheric CO 50 Climatic Optimum 50 Hadean 50 mid Pliocene 50 El Niños 50 glacial cycles 50 storminess 50 Permian extinction 50 Early Archaic 50 Pleistocene Ice Age 50 Mesozoic 50 atmospheric methane 50 Dry Valleys 50 faunas 50 Cretaceous 49 warm interglacial periods 49 Late Cretaceous 49 Jurassic Period 49 mya 49 Palaeocene Eocene Thermal Maximum 49 Great Oxidation Event 49 marine sediments 49 Neoproterozoic era 49 Quaternary Period 49 Holocene epoch 49 SSTs 49 warmings 49 Permian Period 49 Jurassic 49 Archaic Period 49 Plio Pleistocene 49 paleomagnetic 49 tropopause 49 Sr Ca 49 Middle Miocene 49 ENSO 49 Early Cretaceous 49 Cenozoic Era 49 Paleocene 49 solar irradiance 49 Maastrichtian 49 Pleistocene era 49 El Niño Southern Oscillation 48 humans Homo sapiens 48 multi decadal 48 Medieval Warming Period 48 Cambrian explosion 48 Subarctic 48 El Nio 48 Oligocene 48 paleoenvironmental 48 austral summer 48 multidecadal 48 ° C warmer 48 paleo 48 Tertiary Period 48 Beringia 48 glaciers receded 48 Jakobshavn Isbrae 48 isotopic 48 mid latitudes 48 warm interglacial 48 Permian Triassic boundary 47 Cambrian Explosion 47 polar vortex 47 Proterozoic 47 Radiocarbon 47 benthic foraminifera 47 Paleocene Eocene 47 basalts 47 sedimentary deposits 47 paleoclimate 47 Pliocene epoch 47 forcings 47 Eocene Oligocene 47 Middle Pleistocene 47 atmospheric carbon dioxide 47 depositional 47 Precambrian 47 Cretaceous Paleogene 47 Mass Extinction 47 magmatism 47 surface temperatures SSTs 47 Early Bronze Age 46 interannual 46 thermal inertia 46 Paleolithic Age 46 Palaeolithic 46 Palaeozoic 46 Medieval Warm Period MWP 46 C4 grasses 46 yr -1 46 glacial 46 GtC 46 Mg Ca 46 degrees Fahrenheit warmer 46 diatoms 46 Maunder Minimum 46 megafauna 46 Middle Eocene 46 isotopic composition 46 Middle Paleolithic 46 Quaternary Science Reviews 46 isotope ratios 46 Paleoclimate 45 geochronology 45 Late Cretaceous Period 45 refugia 45 ancient supercontinent 45 hydrological cycle 45 El Nino Southern Oscillation 45 geologic 45 subglacial 45 glacial retreat 45 glacial interglacial cycles 45 Indian Ocean Dipole 45 sunspot cycles 45 Polar Regions 45 interannual variability 45 Miocene 45 coolings 45 Current Warm Period 45 ocean ridges 45 decadal 45 glaciers melted 45 Cretaceous periods 45 sedimentary layers 45 magmas 45 diatom 45 climatic variability 45 terrestrial ecosystems 45 lavas 45 Milankovitch 45 Paleozoic era 45 #.#oC [001] 45 Sturtian 45 coastal upwelling 45 δ 45 CO2 concentrations 45 Cryogenian period 45 cosmic ray intensity 45 Homo sapiens 45 supercontinent 45 decadal variability 45 El Ninos 44 greenhouse warming 44 Late Paleozoic 44 Preclassic 44 glaciers retreated 44 radiative forcing 44 Myr 44 Neandertals 44 oxygen isotope 44 Baktun 44 sediments deposited 44 Paleolithic 44 ppm CO2 44 El Nino La Nina 44 hydrothermal activity 44 millennia 44 ostracods 44 atmospheric circulation 44 Oscillation 44 Mesozoic era 44 Triassic Jurassic 44 Neolithic 44 Messinian 44 biogeographic 44 hunter gatherers 44 Oligocene epoch 44 cosmic ray flux 44 Chicxulub impact 44 sunspot 44 circumpolar Arctic 44 Archaean 44 latitudes 44 hydrosphere 44 Dansgaard Oeschger 44 Gondwanaland 44 anomalously warm 44 Fertile Crescent 44 hydrologic cycle 44 MJO 44 ocean sediment cores 44 Madden Julian Oscillation 44 Hesperian epoch 44 radiocarbon 44 sunspot cycle 44 Fram Strait 44 anthropogenic 44 Permafrost 44 salinities 44 El Niño La Niña 44 midlatitudes 44 nitrogen fixation 44 IPCC AR4 44 downwelling 44 mammal extinctions 44 Rossby waves 43 Surtsey 43 Late Archaic 43 Atlantic Multidecadal Oscillation AMO 43 Paleoindian 43 ppmv 43 palaeoclimate 43 Orogeny 43 altitudinal 43 cosmogenic 43 cratons 43 KT boundary 43 Mount Mazama 43 Panderichthys 43 Toba eruption 43 crustal 43 foraminifera 43 #.#C above 43 upper tropospheric 43 Late Miocene 43 tropical troposphere 43 El Niño 43 subglacial lakes 43 Miocene Epoch 43 tectonically 43 basaltic rocks 43 radiocarbon dated 43 greenhouse gas concentrations 43 prehistory 43 Moho 43 substorm 43 ocean eddies 43 forams 43 southern supercontinent 43 Cenomanian 43 teleconnections 43 continental crust 43 Sedimentary rocks 43 solar nebula 43 primate evolution 43 cretaceous 43 Younger Dryas cold 43 planktonic foraminifera 43 Puijila 43 PETM 43 carbonate sediments 43 Birdsongs 43 latitudinal 43 Milankovitch cycles 43 Atlantic Multidecadal Oscillation 43 isotope composition 43 subarctic 43 Upper Jurassic 43 equatorial Pacific Ocean 43 flood basalts 43 Aptian 43 Miocene Pliocene 43 temperature reconstructions 43 Siberian Traps 43 carbon isotopes 43 mammal fossils 42 Snake River Plain 42 hypoxic zone 42 meteorite bombardment 42 Neanderthal extinction 42 epochs 42 Arctic Oscillation 42 ENSO El Nino 42 Homo sapiens evolved 42 Fossils 42 Lake Untersee 42 atmospheric CO2 levels 42 Archaic 42 subpolar 42 climatologically 42 el Niño 42 boreal regions 42 rifting 42 faunal 42 Mesoproterozoic 42 sulfidic 42 mantle convection 42 Late Bronze Age 42 stromatolite 42 Pacific Decadal Oscillation PDO 42 chondrites 42 equatorial Pacific 42 Pleistocene Era 42 sediment cores 42 desiccation 42 bonebed 42 oxygen isotope ratios 42 Acanthostega 42 Carboniferous Period 42 ° latitude 42 Pacific decadal oscillation 42 Laurentide Ice Sheet 42 #.#C warmer 42 Paleo Indian 42 abundances 42 isotopic compositions 42 paleoclimatologists 42 Yellowstone caldera 42 Mesozoic Era 42 Geomagnetic 42 biogeochemical processes 42 Silurian 42 Arabia Terra 42 warmer wetter 42 Osedax 42 2oC 42 climatically 42 peopling 42 southern latitudes 42 sunspot activity 42 anomalously 42 chlorophyll concentrations 42 hominids 42 tropospheric 42 megafaunal 42 Neandertal 42 lake sediments 42 Paleolithic Era 42 atmospheric 42 magmatic 42 Neanderthals 42 Lake Yoa 42 Anthropogenic 42 Crustal 42 metamorphism 42 taxa 42 Ontario Lacus 42 coccolithophores 42 magma ocean 42 lobe finned fishes 41 North Atlantic Oscillation 41 Ptolemaic 41 cryosphere 41 phyllosilicates 41 oxygen isotopic composition 41 Hominids 41 Arctic oscillation 41 Ice Age 41 ENSO neutral conditions 41 climatic 41 anthropogenic greenhouse gas 41 clathrates 41 upwellings 41 Cretaceous Paleogene boundary 41 atmospheric circulations 41 sulfur isotope 41 phytoplankton populations 41 AR4 41 ornithischians 41 radiocarbon dates 41 biogeochemical 41 Irvingtonian period 41 oceanic circulation 41 Paleocene Eocene thermal 41 Cretaceous Tertiary boundary 41 SST anomalies 41 lithosphere 41 grabens 41 upwelling 41 Appy Sluijs 41 seabed sediments 41 Velicogna 41 anoxic 41 extinctions 41 Elamite era 41 silicic 41 Sumatra Andaman earthquake 41 phytoplankton blooms 41 Amundsen Sea 41 carbon dioxide concentrations 41 ENSO cycle 41 climatological 41 Epochs 41 oligotrophic 41 anthropogenic emissions 41 Saqqaq 41 H. erectus 41 evaporite 41 seafloor sediments 41 Hellas Planitia 41 Bronze Age 41 ocean basins 41 aeolian 41 tectonics 41 sedimentary sequences 41 Ordovician extinction 41 Gigantopithecus 41 eruptive activity 41 Palaeo 41 magnetic polarity 41 sediments 41 multicellular animals 41 hunter gatherer societies 41 Laramidia 41 biome 41 igneous rocks 41 lobe finned fish 41 Middle Devonian 41 Climatic 41 La Niña 41 Neolithic Age 41 albedo 41 SN #/#/# [002] 41 supervolcanoes 41 Upper Carboniferous 40 Cambrian Ordovician 40 Tibetan Plateau 40 ecoregions 40 solar minima 40 radiocarbon dating 40 temperate latitudes 40 tectonic plate movements 40 phytoplankton biomass 40 species extinctions 40 fine grained sediment 40 plankton blooms 40 geological timescale 40 Cretaceous Tertiary 40 permafrost soils 40 MJO wave 40 Bellingshausen Sea 40 terrestrial vertebrates 40 Antarctic Peninsula 40 isotope fractionation 40 northern latitudes 40 carbonate minerals 40 hominins 40 axial tilt 40 McMurdo Dry Valleys 40 Siberian permafrost 40 anthropogenic warming 40 anthropogenic climate 40 lacustrine 40 orogenic 40 Industrial Revolution 40 airglow 40 Ross Ice Shelf 40 amphibolite facies 40 diurnal temperature 40 angiosperms 40 carbon isotope ratios 40 Antarctic Ice 40 methanogens 40 siliciclastic 40 satellite altimetry 40 angiosperm 40 atmospheric concentrations 40 Noachian era 40 Zalasiewicz 40 fossil 40 plate tectonics 40 carbonaceous chondrites 40 Jin Dynasty 40 millenniums 40 H. habilis 40 cyclonic storms 40 cm -1 40 Laurasia 40 ° #'N 40 CO2 CH4 40 Homo Sapiens 40 anticyclonic 40 Earth biosphere 40 antarctica 40 loess 40 Sinus Meridiani 40 Archean 40 Siple Dome 40 brachiopods 40 paleoclimatology 40 Polar Vortex 40 seismicity 40 biosphere 40 granitoids 40 anatomically modern 40 La Ninas 40 ocean acidity 40 deep convective clouds 40 periodicities 40 supercontinent Pangaea 40 felsic dike 40 vertical wind shear 40 icecap 40 lowermost mantle 40 poleward 40 mantle plumes 40 radiometric dating 40 insolation 40 Paleoproterozoic 40 speciation 40 Aurignacian 40 Mesopotamian civilization 40 Mio Pliocene 40 glacial geology 40 Hellenistic 40 megathrust earthquake 40 animal phyla 40 atmospheric oceanic 40 Upper Triassic 40 exosphere 40 multicellular 40 Ediacara 40 permafrost 40 vertebrate evolution 40 aridity 40 subduction 40 dromaeosaurs 40 datable 40 el Nino 40 Dansgaard 40 metazoans 39 La Nià ± 39 geologically 39 neutrino mass 39 Keeling Curve 39 lunar crust 39 equatorial latitudes 39 Noachian period 39 ostracodes 39 supervolcano eruption 39 stalagmite 39 Inca civilization 39 Alaskan glaciers 39 Middle Jurassic 39 solunar 39 Permo Triassic 39 oceanic 39 Syrtis Major 39 supercontinents 39 Atmospheric CO2 39 H. sapiens 39 oceanic crust 39 coevolution 39 hominid evolution 39 Transantarctic Mountains 39 Burgess Shale 39 photosynthetic organisms 39 advection 39 Neolithic Period 39 Cascadia Subduction Zone 39 pika habitat 39 Agulhas Current 39 Sassanid era 39 ca. 39 crustal thickness 39 prehistoric 39 terrestrial biosphere 39 microbial mats 39 oceanic lithosphere 39 archaea 39 iridium layer 39 Weddell Sea 39 polar latitudes 39 Adélie penguins 39 Tiktaalik 39 continuously inhabited 39 biospheric 39 ecotypes 39 meteor impacts 39 biogeochemical cycles 39 Gondwana 39 facies 39 Upper Miocene 39 Hominid 39 tropical latitudes 39 biosignatures 39 Homo antecessor 39 Gneiss 39 geodynamic 39 sedimentary 39 bison lumbered 39 La Nina 39 glacial ice 39 Early Cretaceous Period 39 Late Heavy Bombardment 39 atmospheric aerosols 39 oxygen isotopic 39 equinoxes 39 Palaeozoic era 39 ALH# 39 meridional overturning circulation 39 Ice Shelf 39 autumn equinox 39 elevational 39 Fig. 1b 39 subarctic regions 39 Earth axial tilt 39 Greenland Ice 39 Equatorial Pacific 39 millennium BCE 39 oceanic currents 39 Glacial 39 La Niñas 39 severe droughts 39 carboniferous 39 Natufian 39 #AD [003] 39 frilled shark 39 diatom species 39 Han Dynasty 39 olivine rich 39 glaciated 39 astronomical alignments 39 Nectocaris 39 Glacial Lake 39 Meridiani 39 boreal 39 peridotites 39 tetrapod 39 oC 39 humans interbred 39 anthropogenic CO 39 Geminid Meteor Shower 39 lunar highlands 39 Evolutionary biology 39 speleothems 39 thermal gradient 39 Greenland ice 39 #.#C #.#F [003] 39 Laptev Sea 39 anorthosite 39 ophiolite 39 Cosmological 39 orbital eccentricity 39 multi decadal signal 39 hurricane landfalls 39 Deccan volcanism 39 seamount 39 reionization 39 deformational 39 Climatic Change 39 Maya civilization 39 Anthony Barnosky 39 erosional 39 Gakkel Ridge 39 #.#C [004] 39 evaporite deposits 39 tectonic 39 trilobites 39 therizinosaur 39 chlorine monoxide 39 ocean acidification 39 marine phytoplankton 39 Antarctic Dry Valleys 39 Palaeocene Eocene thermal 39 total solar irradiance 38 Anno Domini 38 Quadrantids 38 compressional 38 obliquity 38 bce 38 habilis 38 earths 38 meteorite impacts 38 sedimentological 38 dinosaurs roamed 38 GHG concentrations 38 amplifying feedbacks 38 geomagnetic activity 38 montane forests 38 aerosol concentrations 38 outlet glaciers 38 megafauna extinction 38 El Nino warming 38 phenological 38 Fe Mg 38 Harappan 38 climate forcings 38 receding glaciers 38 Gondwanan 38 Middle Palaeolithic 38 Trichodesmium 38 monsoon rainfall 38 intraplate 38 Laurentide ice sheet 38 explosive eruptions 38 sulfur isotopes 38 depositional environment 38 La Nina pattern 38 geomagnetic 38 La Nina cooling 38 temperature gradients 38 multicellular creatures 38 vertebrate fossils 38 Carolingian 38 Maunder minimum 38 NDVI 38 Gamburtsev 38 Antarctic ice 38 Outcrops 38 caldera 38 hominin 38 foreland 38 graben 38 glaciers 38 anthropogenically 38 oxygen isotopes 38 Saturnian 38 Antarctic Ice Shelf 38 basaltic 38 atmospheric CO2 concentrations 38 Gondwana supercontinent 38 El Nino 38 earliest hominid 38 evolutionary lineage 38 volcanic caldera 38 extensional 38 anamensis 38 sedimentary rocks 38 perturbation 38 permafrost degradation 38 Zeebe 38 terra preta 38 Homo neanderthalensis 38 abyssal plain 38 homo erectus 38 tropospheric temperature 38 icecaps 38 Neolithic era 38 strontium isotope 38 Devonian 38 Ayles Ice Shelf 38 polynya 38 climate modellers 38 minima 38 tropical coral reefs 38 palaeo 38 Great Conveyor Belt 38 Homo heidelbergensis 38 streamflow 38 eruptive 38 sulphidic 38 infrared spectral 38 Stegodon 38 Arctic permafrost 38 geomorphology 38 subduction zone earthquake 38 polar ice 38 Lake Vostok 38 Pre Cambrian 38 Mongol empire 38 climate modelers 38 collisional 38 volcanically active 38 quartz feldspar porphyries 38 hominid species 38 ° N 38 isotherms 38 silicate dust 38 Cretaceous Tertiary KT 38 Tharsis 38 supersaturation 38 Harappan civilization 38 SeaWiFS 38 noctilucent clouds 38 Brahmaputra basin 38 biogeographical 38 hunter gatherer 38 irradiance 38 gyre 38 CH4 38 basinal 38 martian meteorites 38 Australopithecus 38 Iron Age 38 spatial variability 38 biogenic 38 bimodal distribution 38 continental drift 38 ppbv 38 landmasses 38 Skarn 38 Seismicity 38 Adelie penguins 38 methane clathrates 38 Ötzi 38 autumnal equinox 38 cryovolcanism 38 polar 38 millenia 38 Phylogenetic 38 Mancos shale 38 polar mesospheric clouds 38 asymptotic 38 atmospheric ozone 38 Prochlorococcus 38 mammoths 38 Xia Dynasty 38 glaciological 38 granitoid rocks 38 post perovskite 38 hydrothermal vent 38 Otto Bliesner 38 gabbros 38 sub glacial lakes 38 bony fishes 38 planetesimals 38 radar altimetry 38 iceberg calving 38 Fig. 1A 38 Sarahsaurus 38 melting glacial 38 permafrost melts 38 Eutrophication 38 La Niña pattern 38 Indus civilization 38 Ancestral Puebloans 38 ridging 38 Antarctic ozone 38 Vastitas Borealis 37 Paleozoic sedimentary 37 Athabasca sandstone 37 Antarctic stratosphere 37 lunar perigee 37 Phenology 37 Mistaken Point 37 Crozet Islands 37 Jurassic Triassic 37 Martian 37 magnetospheric 37 Hellas Basin 37 amphipods 37 Olmec culture 37 fossils 37 geological strata 37 conodonts 37 spatial scales 37 Dr van Ommen 37 bristlecone pines 37 Jurassic Cretaceous 37 phylogeographic 37 Super Earths 37 anthropogenic CO2 37 sedimentary strata 37 Elamite 37 Geologically speaking 37 basalt 37 anticyclone 37 Nature Geoscience 37 sunspots 37 permafrost thaws 37 Ulysses spacecraft 37 Extinctions 37 Sunspots 37 phylogenies 37 martian 37 Olduvai 37 colonization 37 climatic variations 37 punctuated equilibrium 37 massifs 37 geomorphic 37 icesheet 37 chinstrap penguins 37 Navajo Sandstone 37 Estrada Belli 37 ITCZ 37 mineralized intrusive 37 supervolcano 37 stromatolites 37 adsorbate 37 Balhae 37 geological timescales 37 craton 37 missing baryons 37 Rignot 37 albedo feedback 37 anthropogenic aerosols 37 Neanderthals Homo neanderthalensis 37 km3 37 sunspot numbers 37 equatorial 37 hominid fossils 37 NSIDC 37 insect outbreaks 37 granitoid 37 single celled algae 37 Norte Chico 37 volcanic activity 37 eastern equatorial Pacific 37 lactase persistence 37 calderas 37 Upwelling 37 Kasatochi 37 paleochannel 37 Denisovans 37 Australopithecus anamensis 37 magma chambers 37 Neanderthal 37 La Niña winters 37 equatorial regions 37 carbon fluxes 37 australopithecines 37 benthos 37 Tawa hallae 37 nitrogen isotope 37 Scambos 37 placentals 37 stratigraphic sequence 37 Roman Empire 37 J Clin Invest 37 equinox 37 Biogeochemistry 37 warmer wetter winters 37 central equatorial Pacific 37 Strathcona Fiord 37 phytoplankton bloom 37 paleoecology 37 polar caps 37 Homo erectus 37 Martian meteorites 37 Precambrian rocks 37 stratospheric clouds 37 epoch 37 El Ni 37 anthropogenic carbon dioxide 37 cyclogenesis 37 Landsea 37 acidification 37 tidewater glacier 37 icefield 37 Mousterian 37 boreal forests 37 glacier retreat 37 harmful algal bloom 37 Palaeozoic sedimentary