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(Click for frequent words.) 68 Arctic permafrost 66 melting permafrost 64 Permafrost 62 Siberian permafrost 62 thawing permafrost 62 glaciers 62 permafrost melts 62 Antarctic ice 60 subglacial lakes 60 polar ice 59 permafrost thaws 59 Greenland ice 58 tundra 58 glacier 58 sedimentary deposits 57 glacial ice 57 boreal regions 57 sedimentary layers 57 icesheets 57 Laurentide ice sheet 57 peat bogs 57 icecap 57 Arctic Ocean 57 glaciation 56 polar regions 56 subarctic 56 subglacial 56 clathrates 56 perma frost 56 Lake Vostok 56 seafloor sediments 56 Thawing permafrost 55 polar icecap 55 Siple Dome 55 retreating glaciers 55 marine sediments 55 mantle convection 55 Amundsen Sea Embayment 55 thawing tundra 54 cryosphere 54 volcanism 54 Laurentide Ice Sheet 54 Tibetan Plateau 54 icesheet 54 alpine glaciers 54 Arctic icecap 54 porous sandstone 54 glaciations 54 icecaps 54 atmospheric methane 54 Qinghai Tibet plateau 54 receding glaciers 53 meltwater 53 Greenland icesheet 53 lithosphere 53 icefields 53 sediments 53 Earth crust 53 Siberian Traps 53 continental crust 53 mid latitudes 53 sediments deposited 53 Yellowstone caldera 53 polar caps 53 deglaciation 53 boreal forests 53 flood basalts 53 polar 52 subsurface 52 McMurdo Dry Valleys 52 Fram Strait 52 permanently shadowed craters 52 permafrost melting 52 Melting ice 52 Arctic tundra 52 Transantarctic Mountains 52 methane hydrates 52 glacial retreat 52 glacial melting 52 Antarctic Ice 52 boreal forest 52 Arctic 52 Antarctica 52 molten magma 52 Jakobshavn 52 plate tectonics 52 earth crust 52 Polar Regions 52 geological formations 52 glacial 52 cratons 51 saline aquifers 51 Amundsen Sea 51 Greenland icecap 51 basaltic rocks 51 Snowball Earth 51 oceanic crust 51 subglacial lake 51 Antarctic Peninsula 51 arctic permafrost 51 Quaternary Period 51 Greenland Ice 51 Greenland glaciers 51 mantle plumes 51 geologic 51 yedoma 51 methane clathrates 51 Late Paleozoic 51 Lake Untersee 51 Weddell Sea 51 greenhouse warming 51 crustal 51 permafrost soils 51 mountain glaciers 51 atmospheric CO2 51 cryovolcanism 51 sub glacial lakes 51 glaciers melt 51 arctic 51 lake sediments 51 subsurface ocean 51 glacier melt 51 surface hoar 51 magma ocean 51 atmospheric carbon dioxide 51 hydrological cycle 51 temperate forests 51 saline aquifer 51 peatlands 51 geologic formations 51 gas hydrates 51 Appy Sluijs 51 Cryogenian 50 Antarctic glaciers 50 peat bog 50 CO2 concentrations 50 Whillans Ice Stream 50 Pleistocene Ice Age 50 Greenland Antarctica 50 sedimentary rock 50 methane hydrate 50 Qinghai Tibet Plateau 50 Dry Valleys 50 carbonate minerals 50 melting ice 50 shrinking glaciers 50 asthenosphere 50 permafrost degradation 50 glacial till 50 calderas 50 Eemian 50 polar vortex 50 hydrosphere 50 methane seeps 50 Greenland glacier 50 volcanic basalt 50 boreal ecosystems 50 abyssal plain 50 shadowed craters 50 subalpine 50 coccolithophores 50 subarctic regions 50 Permian extinction 50 downwelling 50 carbon dioxide concentrations 50 geothermal gradient 50 Antarctica EPICA 49 Melting glaciers 49 interglacial period 49 deepwater corals 49 polar craters 49 receding glacier 49 Alpine glaciers 49 melting glacier 49 atmospheric CO 49 seafloor 49 permafrost thaw 49 lunar crust 49 icy crust 49 regolith 49 undersea volcanoes 49 Antarctic 49 moulins 49 Leda clay 49 permanently shadowed 49 Palaeocene Eocene Thermal Maximum 49 outlet glaciers 49 melting 49 iceberg calving 49 bedrock outcrops 49 Greenland 49 glaciers melted 49 Ross Ice Shelf 49 Lake Yoa 49 Jakobshavn Isbrae 49 Brunt Ice Shelf 49 glaciers receded 49 Ice Shelf 48 Vatnajökull 48 Wilkins Ice Shelf 48 igneous rocks 48 glaciers retreated 48 Scambos 48 hydrologic cycle 48 icefield 48 loess 48 mud volcanoes 48 paleoclimate 48 Brigham Grette 48 tectonic stresses 48 impermeable shale 48 limestone bedrock 48 saline formations 48 Sermilik Fjord 48 lavas 48 Quaternary 48 Melting permafrost 48 peat soils 48 Polar Vortex 48 muskeg 48 caribou herds 48 atmospheric CO2 levels 48 Rignot 48 glacial melt 48 snowline 48 Bering Glacier 48 Gakkel Ridge 48 subduction zones 48 underground geological formations 48 seafloor methane 48 stratospheric ozone 48 mid Pliocene 48 methane 48 seabed sediments 48 silicate rocks 48 mammoths 48 sediment 48 temperate rainforest 48 Kocet 48 magmas 48 glacial meltwater 48 Lomonosov ridge 48 arctic tundra 48 atmospheric CO2 concentrations 48 Jupiter moons Europa 48 warmer wetter 48 streambanks 48 terrestrial ecosystems 48 Boreal forests 48 boreal 48 magma 48 poleward 48 refugia 47 Otto Bliesner 47 volcanic activity 47 volcanic arcs 47 polar icecaps 47 Puijila 47 Svalbard 47 warmings 47 interglacial 47 Dronning Maud Land 47 Last Glacial Maximum 47 Himalayan river basins 47 glaciological 47 Yellowstone Caldera 47 sediment cores 47 Konrad Steffen 47 landforms 47 Vastitas Borealis 47 paleomagnetic 47 abyssal plains 47 Antarctic glacier 47 ocean ridges 47 colliding tectonic plates 47 Toba eruption 47 ocean basins 47 Plate tectonics 47 terminal moraine 47 Alaskan tundra 47 retreating glacier 47 glacial fjord 47 Molnia 47 Larsen Ice Shelf 47 thermal vents 47 pikas 47 Ellesmere Island 47 Holocene epoch 47 coniferous forests 47 alpine ecosystems 47 midlatitudes 47 Glaciers 47 sedimentary rocks 47 icebound 47 Younger Dryas 47 crust 47 antarctic ice 47 seabed 47 ice melts 47 melting glaciers 47 melting icebergs 47 megafauna 47 isostatic rebound 47 mountain snowpacks 47 Burgess Shale 47 KT boundary 47 tectonically active 47 overlying layers 47 tropopause 47 crustal movements 47 midlatitude 47 tropical glaciers 47 hydrothermal activity 47 Chris Waythomas 47 glacial cycles 47 Himalayan Glaciers 47 magma chamber 47 moraine 47 equatorial regions 47 geologically 47 Mount Kilimanjaro glaciers 47 Ny Alesund 47 tectonic plate movements 47 spruce fir forests 47 Qinghai Tibetan plateau 47 springtime ozone 47 soils 47 Chasma Boreale 47 water vapor 47 Arctic seabed 46 Shiveluch 46 snowpack 46 ° C warmer 46 thermosphere 46 Nares Strait 46 geologically active 46 hydrate deposits 46 Hellas Basin 46 dwelling organisms 46 oceanic plates 46 coniferous forest 46 amplifying feedbacks 46 tropical troposphere 46 spruce fir forest 46 Ilulissat glacier 46 Martian surface 46 anticlines 46 phyllosilicate 46 Doomsday Seed Vault 46 Kilimanjaro glaciers 46 sandstone formations 46 turbidites 46 tectonic activity 46 interglacial periods 46 albedo feedback 46 microbialites 46 Arctic Archipelago 46 forams 46 arctic plains 46 woolly mammoths 46 lunar meteorites 46 Saturn moon Enceladus 46 ocean acidity 46 subduction zone 46 Neogene 46 katabatic winds 46 GJ#b 46 Svalbard archipelago 46 Tharsis Rise 46 lakebed 46 permafrost melt 46 Hesperian Epoch 46 intraplate 46 basaltic rock 46 tundra vegetation 46 Antarctic Dry Valleys 46 foot Redoubt Volcano 46 Martian arctic 46 Adélie penguins 46 glaciers melting 46 supercontinents 46 post perovskite 46 glaciologists 46 Martian dunes 46 lunar craters 46 Martian craters 46 mantle lithosphere 46 kerogen 46 semidesert 46 subducted 46 Cascadia subduction zone 46 volcanic magma 46 methane clathrate 46 Norris Geyser Basin 46 volcanic vents 46 Martian polar 46 volcanic eruptions 46 Willerslev 46 crustal plate 46 Antarctic Ice Shelf 46 lunar soil 46 clay subsoil 46 Serreze 46 supervolcano 46 paleoclimatology 46 subpolar 46 Igor Semiletov 46 Patagonian Andes 46 polar oceans 46 Hesperian epoch 46 tectonics 46 peat lands 46 paleontological discoveries 46 temperature reconstructions 46 mesosphere 46 Syrtis Major 46 magmatic 46 sedimentary sequences 46 ALH# 46 Martian volcanoes 46 foraminifera 46 moon Enceladus 46 Ayles Ice Shelf 45 -# degrees Fahrenheit [002] 45 glacier shrinkage 45 meteorite impacts 45 NSIDC 45 molten rocks 45 Jovian moon 45 musk oxen 45 Quelccaya 45 layered sedimentary rock 45 poleward shift 45 Waleed Abdalati director 45 wolverine habitat 45 paleoenvironmental 45 Leif Kullman 45 talus slopes 45 basalt lava 45 deep convective clouds 45 Venusian atmosphere 45 fissure eruption 45 ancient lava flows 45 hydrothermal 45 Storing carbon dioxide 45 earths crust 45 eskers 45 pika habitat 45 Alaskan glaciers 45 Glaciologists 45 Earths crust 45 lithospheric 45 warm interglacial periods 45 Ozone depletion 45 steppe mammoth 45 Arctic Circle 45 granite bedrock 45 glacial geology 45 seamounts 45 underwater Lomonosov Ridge 45 Atlantic thermohaline circulation 45 anomalously warm 45 Gamburtsev Mountains 45 pore spaces 45 Beringia 45 greenhouse gas concentrations 45 speleothems 45 Cretaceous Tertiary KT 45 hydrothermal venting 45 Nature Geoscience 45 geological strata 45 Ice Ages 45 lakebed sediments 45 Vladimir Romanovsky 45 paleoclimatic 45 Hematite Slope 45 thermal inertia 45 magma chambers 45 refrozen ice 45 exosphere 45 taiga 45 fossils unearthed 45 Ground penetrating radar 45 increased storminess 45 Qinghai Tibetan Plateau 45 Longmen Shan fault 45 snowcaps 45 Subarctic 45 sparsely vegetated 45 lowermost mantle 45 molten rock 45 magma cools 45 zircon crystals 45 Martian crust 45 Shishmaref 45 Precambrian rocks 45 Laramidia 45 fumarole 45 Bedout 45 carbon dioxide 45 Stratospheric ozone 45 Vermilion Cliffs National 45 oceanic circulation 45 terrestrial biosphere 45 talus 45 Antarctic peninsula 45 acidic oceans 45 Tropical rainforests 45 Laptev Sea 45 stratigraphic sequence 45 depositional 45 Maastrichtian 45 Cabeus 45 shadowy craters 45 climate modelers 45 seabeds 45 Chicxulub impact 45 volcano Olympus Mons 45 granitic basement 45 windblown sand 45 olivine rich 45 Seed Vault 45 geological 45 Martian meteorites 45 seafloor sediment 45 protective ozone layer 45 lava flows 45 Hongbin Qu chief 45 crustal rocks 45 Paleocene Eocene Thermal Maximum 45 solidified lava 45 silicic 45 glaciers recede 45 Methane hydrates 45 tectonic uplift 45 ocean sediment cores 45 Cape Royds 45 Nunavut Territory coal 45 Snake River Plain 45 brachiopods 45 polar plateau 44 lateritic 44 volcanoes 44 basalt formations 44 species extinctions 44 volcanic cinders 44 sedimentary 44 Spitsbergen 44 yardangs 44 volcanic lava 44 thaw cycles 44 massifs 44 albedo 44 snowier winters 44 methane hydrate deposits 44 Eocene Oligocene 44 Beaufort Seas 44 biogeochemical processes 44 Medieval Warming Period 44 gabbro dykes 44 methane concentrations 44 Himalaya glaciers 44 volcanically active 44 Hunt Ice Shelf 44 methane burps 44 Hydrates 44 paleontological 44 explosive volcanism 44 hardened lava 44 Paleogene 44 peatland 44 Sinus Meridiani 44 hydrothermal fluid 44 biodiverse ecosystems 44 circumpolar 44 Martian landscape 44 stromatolites 44 Pleistocene 44 southern latitudes 44 lava domes 44 subaqueous 44 alpine terrain 44 glacial lakes 44 Eske Willerslev 44 melting glacial 44 -# degrees Celsius [001] 44 lava tubes 44 moraines 44 Pacific Decadal Oscillation 44 thermohaline circulation 44 Sphagnum 44 Afar desert 44 isotopic composition 44 Prairie Evaporite Formation 44 tidewater glacier 44 Archaean 44 steppe bison 44 basalts 44 Greenland Glaciers 44 megathrust 44 lodgepole pine forests 44 REE enriched 44 Altai Mountains 44 Terre Adelie 44 circumpolar Arctic 44 grabens 44 Little Ice Age 44 sulphate aerosols 44 supervolcanoes 44 geomicrobiology 44 frozen wastelands 44 Pleistocene era 44 latitudes 44 Cryogenian period 44 biosignatures 44 alpine tundra 44 Tibetan plateau 44 extinct volcanoes 44 glaciated 44 deformation 44 Palaeozoic sedimentary 44 barrens 44 hypoxic zone 44 sheet Summerhayes 44 Denisova cave 44 firn 44 Hik 44 Alaskan permafrost 44 woolly rhinoceros 44 basalt 44 ecosystems 44 carbon sinks 44 Klaza Zone 44 meteor impacts 44 Lamont Doherty 44 Patagonian glaciers 44 atmospheric moisture 44 journal Geology 44 cinder cones 44 snowcover 44 volcanic tuff 44 Cook Inlet basin 44 Siberian tundra 44 dustier stormier atmosphere 44 treelines 44 atmospheric concentrations 44 lander robotic arm 44 blanket bog 44 Warmer oceans 44 disappearing glaciers 44 kept mountainous snowbanks 44 Antarctic icecap 44 glacial sediments 44 Shrinking glaciers 44 martian meteorites 44 tectonic plate boundaries 44 atmospheric circulation 44 Paleoclimate 44 Denisova Cave 44 subsidence 44 supercontinent 44 ponderosa pine forests 44 Martian soil 44 esker 44 bonebed 44 rubbly 44 Hadean 44 Athabasca sandstone 44 Cumbre Vieja 44 karst topography 44 Oort Cloud 44 Capricorn Glacier 44 trackway 44 Katla volcano 44 Charcot Island 44 temperate zones 44 lava 44 evaporite 44 coolings 44 Zeebe 44 lunar regolith 44 ecoregions 44 Arctic Shelf 44 troposphere 44 volcanic cone 44 trembling aspen 44 Olympus Mons 44 Qaidam Basin 44 sagebrush steppe 44 Antarctic continent 44 Valles Marineris 44 Andean glaciers 44 Permian Triassic extinction 44 lodgepole forests 44 Gamburtsev 44 Gas hydrates 44 snowcap 43 Martian atmosphere 43 Ted Scambos 43 tundras 43 fine grained sediment 43 atmospheric oceanic 43 woodland caribou 43 cambium layer 43 Norwegian Polar 43 oxidized mercury 43 Martian permafrost 43 Bellingshausen Sea 43 riparian zones 43 Arctic archipelago 43 Nili Fossae 43 granodiorite porphyry 43 temperature gradient 43 upper troposphere 43 volcano lava dome 43 thermocline 43 upwelling 43 karst limestone 43 melting polar 43 Permian Period 43 basalt volcanic 43 Gondwana supercontinent 43 desolate tundra 43 Shakhova 43 Gondwanaland 43 hydrothermal vents 43 bristlecone pines 43 glacier melts 43 eruptive activity 43 saprolitic 43 Siberian continental shelf 43 anthropogenic carbon dioxide 43 tectonically 43 decaying vegetation 43 Cordillera Blanca 43 acidification 43 solar irradiance 43 Mud volcanoes 43 Svalbard islands 43 deoxygenated 43 Taimyr Peninsula 43 solar corona 43 avalanche chutes 43 limestone caverns 43 watertable 43 Dr van Ommen 43 intertidal 43 Selkirk Mountains 43 icefalls 43 andesitic rocks 43 freshwater aquifers 43 Kostenki 43 glacial moraines 43 manto mineralization 43 surface geochemical anomalies 43 Yellowstone supervolcano 43 Gusev crater 43 claystone 43 Arctic oscillation 43 dolomitic 43 Mount Bosavi 43 Sediments 43 Ithaca Chasma 43 Fluctuating temperatures 43 felsic tuff 43 halite 43 photosphere 43 Kamoamoa eruption 43 Cenozoic Era 43 conifer forests 43 oceans 43 martian landscape 43 teleconnections 43 ejecta 43 spicule 43 permanently shadowed regions 43 Chazy Reef 43 Indian Ocean Dipole 43 colder winters 43 mammal fossils 43 ancient supercontinent 43 Bindschadler 43 shaded craters 43 coral ecosystems 43 solar nebula 43 Quelccaya ice cap 43 smoggy atmosphere 43 treeless tundra 43 geomorphology 43 volcanic 43 ostracods 43 Mount Mazama 43 chloride concentrations 43 hydrological cycles 43 GtC 43 meteorite fragments 43 whitebark pines 43 Natalia Shakhova 43 biosphere 43 underground geologic formations 43 climate modellers 43 moon permanently shadowed 43 neutrino detectors 43 Hellas Planitia 43 palaeoclimate 43 Anthony Barnosky 43 Medieval Warm Period 43 Antarctic icesheet 43 sea hydrothermal vents 43 Woolly mammoths 43 tectonic movements 43 olivine 43 layered outcrops 43 comet nuclei 43 sedimentary layer 43 von Frese 43 crustal thickness 43 microfossil 43 tectonic 43 Beardmore Glacier 43 unmineable coal seams 43 glaciated terrain 43 Antarctic ozone 43 La Niña pattern 43 orangutan populations 43 microfossils 43 hydrothermal springs 43 subtropical oceans 43 methane hydrates exist 43 warm interglacial 43 glacier retreat 43 stalagmite 43 axial tilt 43 drumlins 43 mudstone 43 Ice Age glaciers 43 icy moons 43 graben 43 ice 43 hydrothermal fluids 43 Straneo 43 Cretaceous Tertiary boundary 43 unthawed 43 Barents sea 43 glacial interglacial 43 geyser basin 43 Strathcona Fiord 43 lava flowed 43 landmasses 43 Nectocaris 43 heavily cratered 43 Barents Sea 43 Himalayan glacier 43 iridium layer 43 Volcanic eruptions 43 martian rocks 43 Kasatochi 43 glacier calving 43 stratospheric clouds 43 electromagnetic surveying 43 isotope composition 43 glacial silt 43 basalt rock 43 seismically active zones 43 subducting plate 43 Robert Bindschadler 43 freshwater ecosystems 43 decadal scale 43 tidewater glaciers 43 hominid fossils 43 seismicity 43 phyllosilicates 43 volcanic sediments 43 Younger Dryas cold 42 Melting Arctic 42 doomsday vault 42 hydrated minerals 42 Cretaceous Tertiary 42 Ice Age 42 geomorphic 42 Martian rocks 42 lichen 42 Thorthormi 42 Ontario Lacus 42 Eric Rignot 42 colluvium 42 continental drift 42 unlogged forests 42 western Siberia 42 Arctic Barents Sea 42 Geophysical Research 42 Ozone layer 42 Latady Island 42 Neoproterozoic 42 Columbia Icefield 42 paleoclimatologists 42 nitrogen deposition 42 cosmic ray flux 42 sulfide deposits 42 upwellings 42 frozen wasteland 42 layered ultramafic 42 Yellowstone geysers 42 evergreen forests 42 Julienne Stroeve 42 Shad O'Neel 42 sulfide minerals 42 multicellular creatures 42 lakebeds 42 Tanana River 42 benthos 42 quartz adularia 42 gigatons 42 WAIS 42 silica breccias 42 hidden crevasses 42 basaltic 42 lodgepole pine 42 biogeochemical 42 Enceladus 42 ozone depletion 42 stratovolcano 42 streambeds 42 earths surface 42 NASA QuikScat satellite 42 astrobiological 42 coldest driest 42 Alpine glacier 42 Gangotri glacier 42 anorthosite 42 beech forests 42 silicate minerals 42 heavier rainfalls 42 frost heaving 42 peat swamps 42 Yamal Peninsula 42 abyssal depths 42 geoneutrinos 42 ozone layer 42 aerosol concentrations 42 neutrino detector 42 Navajo Sandstone 42 warship Vasa 42 polynya 42 stalagmites 42 Eocene epoch 42 biospheric 42 Socompa 42 basaltic magma 42 Roland Burgmann 42 biodiversity hotspots 42 towering icebergs 42 kelp forests 42 equatorial Pacific Ocean 42 ice nucleation 42 planet Gliese #c 42 antarctic 42 Inuit Eskimos 42 geologic formation 42 mountain ranges 42 Antartica 42 austral summer 42 foreland 42 lava tube 42 sedimentary strata 42 spicules 42 lava dome 42 Soufriere Hills 42 Jupiter moon Io 42 Meridiani 42 Le Quéré 42 granitoids 42 Ediacaran 42 absorbs carbon dioxide 42 planetesimals 42 climatic variability 42 Seward Peninsula 42 melting Arctic 42 tropical coral reefs 42 snowpacks 42 Deccan Traps 42 deplete oxygen 42 freeze thaw cycles 42 Bylot Island 42 sedimentary basins 42 Terra Meridiani 42 recrystallization 42 aerosol particles 42 northern latitudes 42 Abisko 42 Natalie Mahowald 42 stromatolite 42 Wollaston Domain 42 granite gneiss 42 Antarctic ozone layer 42 Serengeti ecosystem 42 Zoback 42 outer crust 42 subalpine meadows