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(Click for frequent words.) 69 atmospheric CO2 69 atmospheric carbon dioxide 68 carbon dioxide concentrations 67 atmospheric CO 66 atmospheric CO2 levels 65 hydrological cycle 65 CO2 concentrations 64 warmings 64 volcanism 64 atmospheric CO2 concentration 63 deglaciation 63 greenhouse warming 63 methane CH4 63 subglacial lakes 62 Permian extinction 62 hydrologic cycle 62 mammal extinctions 62 GHG concentrations 62 anthropogenic greenhouse gas 62 Paleocene Eocene Thermal Maximum 62 phytoplankton blooms 62 atmospheric CO2 concentrations 62 thermal inertia 62 sulfate aerosols 61 Palaeocene Eocene Thermal Maximum 61 Great Oxidation Event 61 anthropogenic emissions 61 atmospheric concentrations 61 anthropogenic carbon dioxide 61 terrestrial ecosystems 61 interglacial periods 61 climatic variability 61 mass extinctions 60 glacial interglacial 60 cosmic ray flux 60 meteorite bombardment 60 cosmic ray intensity 60 coccolithophores 60 interglacial period 60 glacial melting 60 methane 60 sulphate aerosols 60 aerosol concentrations 60 solar irradiance 60 ppmv 60 Cryogenian 60 anthropogenic greenhouse gases 60 atmospheric aerosols 60 springtime ozone 59 oceanic circulation 59 marine sediments 59 cryovolcanism 59 glacial melt 59 tectonic plate movements 59 Last Glacial Maximum 59 greenhouse gas concentrations 59 solar nebula 59 phytoplankton biomass 59 species extinctions 59 stratospheric ozone 59 sulfate aerosol 59 meltwater 59 Keeling Curve 59 nitrogen deposition 59 meteorite impacts 59 reactive nitrogen 59 radiative forcing 59 cryosphere 58 hydrothermal activity 58 atmospheric ozone 58 hydrosphere 58 marine phytoplankton 58 glacial cycles 58 clathrates 58 anthropogenic 58 icesheets 58 axial tilt 58 ocean acidity 58 aerosol particles 58 glacial interglacial cycles 58 water vapor 58 sediments deposited 58 seafloor sediments 58 magma ocean 58 isotope ratios 58 upwellings 58 glacial meltwater 58 glaciations 58 subsurface ocean 57 Younger Dryas 57 Snowball Earth 57 Jakobshavn Isbrae 57 glaciers melted 57 Antarctic ozone 57 Rignot 57 Cambrian explosion 57 isotopic composition 57 oxidized mercury 57 Maunder minimum 57 meteor impacts 57 terrestrial biosphere 57 Atmospheric CO2 57 icesheet 57 gaseous pollutants 57 extinctions 57 sunspot activity 57 mid latitudes 57 atmospheric circulation 57 Greenland icesheet 57 subglacial 57 silicate rocks 57 nitrous oxide N2O 57 planetary warming 57 carbon isotopes 57 ppbv 56 eruptive activity 56 GtC 56 Permian Triassic 56 magnetic substorms 56 potent greenhouse gas 56 mantle plumes 56 stratospheric ozone depletion 56 El Niños 56 exosphere 56 plankton blooms 56 glaciation 56 glaciers 56 polar caps 56 Ordovician extinction 56 polar vortex 56 active volcanism 56 alpine glaciers 56 Toba eruption 56 tropical troposphere 56 deep convective clouds 56 greenhouse gas nitrous oxide 56 upper troposphere 56 glacial retreat 56 Neoproterozoic 56 basaltic rocks 56 midlatitudes 56 Ice Ages 56 permafrost melts 56 phytoplankton 56 Cambrian Period 56 phosphorus concentrations 56 anthropogenic warming 56 benthic foraminifera 56 anthropogenic CO2 emissions 56 Schladow 56 gigatonnes 56 tropospheric ozone 56 volcanic plumes 55 ozone depletion 55 paleoclimatic 55 meteoritic material 55 Earth biosphere 55 radioactive decay 55 Amundsen Sea Embayment 55 isotope fractionation 55 climatic variations 55 sulfur isotope 55 carbonate minerals 55 mantle convection 55 chloride concentrations 55 glacier shrinkage 55 Le Quéré 55 Ontario Lacus 55 oxygenic photosynthesis 55 ° C warmer 55 multi decadal 55 Atlantic Multidecadal Oscillation AMO 55 mountain glaciers 55 ocean basins 55 Carbon dioxide CO2 55 neutrino mass 55 teragrams 55 amphibian declines 55 primitive meteorites 55 carbon dioxide CO ² 55 Siberian Traps 55 crystalline silicates 55 permafrost thaws 55 thermosphere 55 Carbon dioxide 55 Eocene epoch 55 KT extinction 55 atmospheric pollutants 55 tropopause 54 interstellar clouds 54 Zeebe 54 volcanic activity 54 anthropogenic aerosols 54 Eemian 54 anthropogenic CO2 54 Tibetan Plateau 54 microscopic phytoplankton 54 manmade CO2 emissions 54 seawater pH 54 sulfur isotopes 54 methanogenesis 54 tropospheric 54 GJ#b 54 Plate tectonics 54 total solar irradiance 54 melting permafrost 54 methane clathrates 54 Indian Ocean Dipole 54 surface temperatures SSTs 54 Jakobshavn 54 substorm 54 X ray emission 54 matter antimatter asymmetry 54 moon Enceladus 54 atmospheric oceanic 54 Velicogna 54 Rossby waves 54 lavas 54 interannual variability 54 abundances 54 climate forcings 54 Noah Diffenbaugh 54 Miocene epoch 54 albedo 54 oxygen isotope 54 Quaternary Period 54 Deccan Traps 54 nitrogen fixation 54 sunspot cycle 54 permafrost 54 lithosphere 54 carbon dioxide 54 Ediacaran Period 54 oceanic currents 54 lava fountains 54 Ozone depletion 54 bioavailable iron 54 Little Ice Age 54 permafrost degradation 54 Sumatra Andaman earthquake 54 heat trapping carbon dioxide 54 lunar magma 54 Cenozoic 53 chondrules 53 KT boundary 53 Ediacaran 53 anomalously warm 53 sedimentary deposits 53 geological timescales 53 Fomalhaut b 53 gaseous methane 53 teleconnections 53 glaciers retreated 53 cratons 53 anthropogenic CO 53 Alpine glaciers 53 biogeochemical cycles 53 Kilimanjaro glaciers 53 mass extinction 53 Pleistocene Ice Age 53 Sulphur dioxide 53 tectonic activity 53 #.#oC [001] 53 methane concentrations 53 Milankovitch cycles 53 explosive volcanism 53 Shakhova 53 atmospheric chemistry 53 methane burps 53 sun irradiance 53 paleoclimate 53 martian meteorites 53 Ulysses spacecraft 53 Hadean 53 lunar crust 53 atmospheric moisture 53 ENSO cycle 53 molten magma 53 polar mesospheric clouds 53 equatorial latitudes 53 geomagnetic activity 53 forcings 53 planet magnetosphere 53 atmospheric 53 C4 grasses 53 climate modellers 53 sedimentary layers 53 carbon isotope ratios 53 boreal ecosystems 53 Stratospheric ozone 53 Trichodesmium 53 forams 53 Laurentide ice sheet 53 thermohaline circulation 53 Greenland ice 53 Kharecha 53 dynamical processes 53 interglacial 53 phyllosilicate 53 satellite altimetry 53 tropical latitudes 53 Late Ordovician 53 ppm CO2 53 glaciers melt 53 ozone depleting gases 53 chlorine monoxide 53 pre biotic 53 mountain snowpacks 53 Venusian atmosphere 53 aerosols 53 Permian Triassic boundary 53 ozone O3 53 nitrogen isotope 53 Cambrian Explosion 53 Tharsis Rise 53 poleward 53 mid Pliocene 53 Cosmic Microwave Background 53 isotopic 53 plate tectonics 52 fissure eruption 52 Yellowstone caldera 52 nucleosynthesis 52 Arctic permafrost 52 WASP #b 52 Eric Rignot 52 salinity 52 glacier melt 52 phytoplankton bloom 52 single celled algae 52 seismicity 52 biospheric 52 carbondioxide 52 microbially 52 ecological overshoot 52 cyanobacterial blooms 52 nitrification 52 Cyanobacteria 52 Holocene epoch 52 glaciers receded 52 mineral olivine 52 extrasolar 52 Oligocene epoch 52 Tropical deforestation 52 lake sediments 52 troposphere 52 reef habitats 52 iridium layer 52 Amundsen Sea 52 Aram Chaos 52 methanogenic bacteria 52 GJ #b [002] 52 CAIs 52 Greenland glaciers 52 chlorophyll concentrations 52 paleomagnetic 52 oxygen isotopes 52 anthropogenically 52 Antarctic glaciers 52 Noachian 52 Shiveluch 52 Appy Sluijs 52 magma 52 inorganic mercury 52 Antarctic krill 52 Svedhem 52 Martian meteorite 52 explosive eruptions 52 glacier melts 52 planktonic algae 52 ultraviolet radiation emitted 52 Medieval Warming 52 CH4 52 chlorine peroxide 52 diatoms 52 methane clathrate 52 undersea volcanoes 52 Paleogene 52 preindustrial times 52 synthetic nitrogen fertilizer 52 endothermic 52 Prochlorococcus 52 Murchison meteorite 52 tiny single celled 52 geological epoch 52 isoprene 52 Methyl mercury 52 Harmful algal blooms 52 Antarctic ice 52 ecoregions 52 evaporite deposits 52 isotopic compositions 52 boreal regions 52 isotopic signatures 52 hematite mineral 52 Jupiter moon Io 52 manmade greenhouse gases 52 Hadean Eon 52 Permian Triassic extinction 52 GJ #b [001] 52 oligotrophic 52 foraminifera 52 isostatic rebound 52 Laurentide Ice Sheet 52 longwave radiation 52 N2O emissions 52 volcanic eruptions 52 Arctic oscillation 52 El Nio 52 Great Conveyor Belt 52 isotopic ratios 52 Diporeia 52 outlet glaciers 52 downwelling 52 sub glacial lakes 52 glacial earthquakes 51 continental crust 51 carbonyl sulfide 51 airglow 51 multicellular creatures 51 isotopic signature 51 Southern Oscillation 51 Corot 7b 51 Hesperian epoch 51 magmatic 51 hydroxyl radical 51 Hydrogen sulphide 51 photochemical reactions 51 Mercury magnetosphere 51 tropospheric temperature 51 mesospheric 51 Sulfur dioxide 51 interannual 51 magma chamber 51 km3 51 lowermost mantle 51 El Ninos 51 strontium isotope 51 temperate forests 51 methane hydrate 51 crustal movements 51 ocean ridges 51 Domoic acid neurotoxin 51 carbonate globules 51 crustal 51 El Nino Southern Oscillation 51 biogeochemical 51 Lake Untersee 51 warm interglacial 51 Antarctic Circumpolar Current 51 Mount Tambora 51 Martian meteorites 51 Cryogenian period 51 infall 51 paleoclimatologists 51 Madden Julian Oscillation 51 Atlantic thermohaline circulation 51 chondritic meteorites 51 oceans 51 biogenic 51 Rubisco 51 N2O 51 icecaps 51 noble gases 51 osmium 51 abiogenesis 51 Antarctic stratosphere 51 ferric oxides 51 polar regions 51 thawing permafrost 51 lunar meteorites 51 sediments 51 biosphere 51 Serreze 51 reionization 51 oxygen isotope ratios 51 photosynthetic organisms 51 nitrogen trifluoride 51 icecap 51 earths 51 hydrothermal fluid 51 anoxic 51 Pacific Decadal Oscillation 51 sunspots 51 chondrites 51 anthropogenic climate 51 oVOCs 51 asthenosphere 51 runaway greenhouse 51 Microcystis 51 Dry Valleys 51 upwelling 51 Antarctic Dry Valleys 51 Eocene Epoch 51 amplifying feedbacks 51 bacterial decomposition 51 Kepler #b 51 Saturn moon Enceladus 51 magmas 51 NASA Wilkinson Microwave 51 flood basalts 51 radioactive nuclei 51 El Niño Southern Oscillation 51 Hellas Basin 51 noctilucent clouds 51 carbon dioxide CO2 51 Medieval Warm Period 51 chlorophyll fluorescence 51 olivine 51 Siberian permafrost 51 interglacials 51 icy moons 51 photochemical smog 51 Gangotri glacier 51 Demand BOD 51 isotope ratio 51 Global Warming Potential GWP 51 benthos 51 Hesperian Epoch 51 dustier stormier atmosphere 51 megafauna 51 mesosphere 51 Phanerozoic 51 auroral activity 51 carbonate ion 51 pika habitat 51 glaciers retreating 51 invisible odorless tasteless 51 severe droughts 51 SST anomalies 51 Greenhouse gases 51 salinities 51 Late Devonian 51 exo planet 50 McMurdo Dry Valleys 50 tectonically 50 Arctic icecap 50 helium isotope 50 Late Paleozoic 50 Gamma ray burst 50 basaltic lava 50 hypoxic zone 50 Saturnian moon 50 Huygens descent 50 mineralogical composition 50 jovian 50 Warmer oceans 50 dinosaur extinction 50 volcanic aerosols 50 Nature Geosciences 50 primitive organisms 50 Enceladus 50 Martian volcanoes 50 sterile neutrino 50 distant supernovae 50 Greenland Ice 50 isotope composition 50 angiosperm 50 chondritic 50 Di Achille 50 volcanic tremors 50 Canadell 50 magnetic reconnection 50 superheavy elements 50 Corot 9b 50 calderas 50 solar corona 50 glacial 50 hydrated minerals 50 Orjan Gustafsson 50 Greenland Antarctica 50 coolings 50 Tambora eruption 50 ocean upwelling 50 halogenated gases 50 Behrenfeld 50 Siple Dome 50 Pliocene 50 airborne pollutant 50 retreating glaciers 50 ALH# 50 microbial organisms 50 exothermic reaction 50 smallest exoplanet 50 sulphates 50 copepod 50 von Frese 50 Medieval Warming Period 50 COROT 7b 50 sulfuryl fluoride 50 coastal upwelling 50 gigatons 50 volcanic quakes 50 hoofed critters 50 Saturn auroras 50 glaciological 50 disappearing glaciers 50 supernova explosion 50 atmospheric deposition 50 ejecta 50 VY Canis Majoris 50 Carbon dioxide concentrations 50 paleoenvironmental 50 Glacial melt 50 Melting glaciers 50 geological timescale 50 geothermal gradient 50 gravitational radiation 50 dwelling organisms 50 geomagnetic field 50 sunlike stars 50 geologically active 50 nuclides 50 Gliese #c 50 #.#C warmer 50 PBDE concentrations 50 degree Centigrade 50 QQ# 50 BP Piscium 50 Norris Geyser Basin 50 volatiles 50 coral calcification 50 Mojzsis 50 acidification 50 galactic cosmic rays 50 abyssal plain 50 diurnal variation 50 exceedences 50 Medieval Warm Period MWP 50 Holocene 50 vegetation greenness 50 equatorial Pacific Ocean 50 decadal 50 midge populations 50 supervolcanoes 50 meteoritic 50 Millennium Ecosystem Assessment 50 geochemists 50 element osmium 50 warm interglacial periods 50 sunspot cycles 50 CO2 CH4 50 CoRoT 7b 50 vertebrate fossil 50 lunar perigee 50 prokaryotes 50 sunspot numbers 50 tectonic stresses 50 Type Ia supernova 50 absorbs CO2 50 electron density 50 geoneutrinos 50 seabed sediments 50 Corinne Le Quere 50 magnetic polarity 50 planetesimals 50 Nature Geoscience journal 50 WMAP satellite 50 waterbird species 50 megathrust earthquake 50 polar latitudes 49 atmospheric nitrogen 49 polar icecap 49 Qinghai Tibet plateau 49 extrasolar planet 49 mud volcanoes 49 radiative transfer 49 Phytoplankton 49 methanogens 49 stratospheric ozone chemistry 49 Dr van Ommen 49 hydroxyl molecules 49 periodicities 49 ostracods 49 biogeochemical processes 49 palaeoclimate 49 ocean eddies 49 inhomogeneities 49 phyllosilicates 49 Laki eruption 49 ULIRGs 49 Miocene Epoch 49 gamma ray burst 49 SeaWiFS 49 waterbird populations 49 Siberian Arctic 49 lunar craters 49 animal phyla 49 particles emitted 49 Late Heavy Bombardment 49 SO2 emission 49 Noachian era 49 Nature Geoscience 49 radiocarbon 49 Neogene 49 carbon dioxide methane 49 Patagonian glaciers 49 trophic levels 49 diatom species 49 Yearly suicides 49 carbon cenospheres 49 auroral 49 hydrate deposits 49 Ocean acidification 49 atmospheric circulations 49 glacier retreat 49 Paleozoic Era 49 moon gravitational pull 49 Palaeocene Eocene thermal 49 galaxy formation 49 globulars 49 CaCO 3 49 Luterbacher 49 telescopic observations 49 Lengai 49 chromosphere 49 nematode Caenorhabditis elegans 49 auroral displays 49 El Niño La Niña 49 TrES 4 49 galaxy redshift 49 gases emitted 49 Eyjafjoell eruption 49 Lake Vostok 49 microplastics 49 plankton bloom 49 acidifying oceans 49 putrescine 49 metallicity 49 Fecal coliform 49 snowpack 49 organic compounds 49 Methylmercury 49 permafrost thaw 49 Antarctic icesheet 49 acidic oceans 49 Permian Period 49 Jay Famiglietti 49 superheavy element 49 cyanobacterial 49 volcanic magma 49 albedo feedback 49 greenhouse gases 49 iceberg calving 49 amphipods 49 produced Friedlingstein 49 receding glaciers 49 Antarctic Ice 49 tholins 49 strange quark 49 absorbs carbon dioxide 49 La Ninas 49 #.#C [004] 49 photosynthetically 49 carbonic acid 49 earth crust 49 muon neutrinos 49 supervolcano 49 Paleoclimate 49 sulphate particles 49 Ultraviolet radiation 49 SCIAMACHY 49 methyl chloroform 49 ionized particles 49 SO2 emissions 49 baryonic matter 49 lava domes 49 homochirality 49 dissolved oxygen pH 49 toxic alga 49 supernova explosions 49 galactic disk 49 tailpipe gases 49 transiting planets 49 Diatoms 49 Fine particle pollution 49 single celled bacteria 49 dieoff 49 geomagnetic substorms 49 methane hydrates 49 smoggy atmosphere 49 2oC 49 sediment cores 49 Toxics Release Inventory TRI 49 heat trapping 49 X ray pulses 49 Earthlike planets 49 streamflow 49 protoplanetary disks 49 Equatorial Pacific 49 solar insolation 49 SN Ia 49 Pacific hake whitefish 49 dimethyl sulfide 49 glacial ice 49 magnetotail 49 marine plankton 49 Jay Zwally 49 shadowed craters 49 gigatonne 49 terrestrial vertebrate 49 degassed 49 sediment 49 Saharan dust 49 Reactive oxygen species 49 single celled organisms 49 sealevel 49 evapotranspiration 49 lava flows 49 permafrost soils 49 climate modelers 49 Otto Bliesner 49 dynamical evolution 49 basalt lava 49 Kraken Mare 49 SN #gy 49 microbial ecosystems 49 biosignature 49 decadal variability 49 isotherms 49 Grímsvötn 49 inner moons 49 geomorphic 49 jarosite 49 observable phenomena 49 coronal hole 49 Anthropogenic 49 porous sandstone 49 spectroscopic analysis 48 planktonic foraminifera 48 temperature reconstructions 48 decaying vegetation 48 glaciers recede 48 Puijila 48 asteroid impacts 48 nitrogen 48 Mud volcanoes 48 Igor Semiletov 48 galactic mergers 48 Earth Overshoot Day 48 photosphere 48 Kilauea summit 48 megadrought 48 kyr 48 neutrino detectors 48 Coral bleaching 48 supercontinent Pangaea 48 phytoplankton populations 48 nitrogen oxide NOX 48 cometary dust 48 Nitrogen oxides 48 ghg emissions 48 Harvati 48 missing baryons 48 Younger Dryas cold 48 nitrous oxide emissions 48 cyclonic storms 48 peat lands 48 Cow burps 48 Climatic Optimum 48 antineutrinos 48 Konrad Steffen 48 hydrothermal 48 carbon fluxes 48 Methane hydrates 48 volcanoes spewing 48 CoRoT 9b 48 #.#C #.#C 48 specular reflection 48 ozone particulate matter 48 Nitrogen dioxide 48 Earth ozone layer 48 CO2 48 Schellart 48 Cenozoic Era 48 Rahmstorf 48 amphibian populations 48 circumstellar 48 anerobic 48 Magellanic Stream 48 ENSO El Nino 48 photosynthesising 48 trophic cascade 48 liquid ethane 48 dietary nitrate 48 diffuse aurora 48 Antarctic glacier 48 La Nina cooling 48 AB Aurigae 48 supernovae 48 amphibian species 48 faunas 48 α synuclein 48 cloud condensation nuclei 48 tectonic earthquakes 48 Triassic Period 48 silicate dust 48 Cassin auklet 48 colder drier 48 sulfur dioxide SO2 48 Hot Jupiters 48 permafrost melting 48 archaea 48 manmade greenhouse gas 48 peat soils 48 Sr Ca 48 Himalayan Glaciers 48 volcanically active 48 carbonaceous chondrites 48 smoker vents 48 stromatolites 48 Lake Yoa 48 Professor Hoegh Guldberg 48 sunspot 48 Martian gullies 48 contaminant concentrations 48 planet Gliese #g 48 trophic cascades 48 Tropical rainforests 48 Cretaceous Paleogene 48 exoplanetary systems 48 post perovskite 48 dimethyl sulphide 48 CarbonTracker 48 Cancri e 48 Cumbre Vieja 48 Fashion Movie Reviews 48 volcanic gases 48 hydrothermal vent 48 glacier melting 48 filamentary structure 48 fearsome Tyrannosaurus rex 48 baryonic 48 atmospheric ozone layer 48 Anthropocene 48 paleoclimatology 48 atmospheric convection 48 collisional 48 comet nuclei 48 seafloor sediment 48 elemental abundances 48 landfalling hurricanes 48 earths surface 48 absorbing carbon dioxide 48 peat bogs 48 coronal loop 48 melting glacier 48 Boreal forests 48 insolation 48 temperature gradients 48 asteroidal 48 Schmittner 48 Greenhouse gasses 48 volcanoes erupt 48 icy comets 48 Luthcke 48 chemical reactivity 48 coronal heating 48 supercontinent 48 stratospheric clouds 48 cinder cones 48 olivines 48 molten rocks 48 Eyjafjoell volcano 48 stress hormone corticosterone 48 melting icebergs 48 protoplanetary disk 48 storminess 48 harmful algal bloom 48 Wm -2 48 phreatic 48 CO ² 48 PFCAs 48 convection currents 48 stromatolite 48 Syrtis Major 48 strange quarks 48 permanently shadowed craters 48 oxygen isotopic composition 48 Elevated mercury 48 superfluids 48 megafauna extinction 48 advection 48 deplete oxygen 48 toxic methylmercury 48 Klekociuk 48 SSTs 48 ozone concentrations 48 electromagnetic phenomena 48 planet orbits 48 volcanic earthquakes 48 West Antarctic icesheet 48 anoxia 48 thermal gradients 48 Eta Aquarid meteor shower 48 Geminid shower 48 tectonic uplift 48 gases 48 El Nino periodic