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(Click for frequent words.) 71 polar regions 65 oceans airways 62 cryosphere 61 Envisat ASAR 61 radar altimetry 60 Arctic 60 ecoregions 59 Dry Valleys 59 polar 59 polar oceans 59 Bellingshausen Sea 59 Brigham Grette 58 coldest driest 58 Rossby waves 58 Weddell Sea 58 climatic variations 58 midlatitude 58 Lake Untersee 58 subglacial lakes 58 Antarctica 58 southern latitudes 58 microbial ecosystems 58 midlatitudes 57 atmospheric oceanic 57 deglaciation 57 Amundsen Sea 57 austral summer 57 coastal upwelling 57 hydrosphere 57 biogeochemical processes 57 situ measurements 57 crustal thickness 57 glacial cycles 57 Subarctic 57 polar vortex 56 landforms 56 mid Pliocene 56 Antarctic 56 polar caps 56 subpolar 56 glacial interglacial 56 CryoSat mission 56 sub glacial lakes 56 deepwater corals 56 Himalayan river basins 56 Earth Observation EO 56 oceanic circulation 55 subarctic 55 permanently shadowed regions 55 ESA Envisat satellite 55 receding glaciers 55 ocean basins 55 Otto Bliesner 55 Stratospheric ozone 55 glaciological 55 polar icecap 55 Ulysses spacecraft 55 tropic regions 55 stratospheric clouds 55 Ocean Salinity 55 mid latitudes 55 AERONET 55 airglow 55 aboard ESA Envisat 55 latitudes 55 Arctic Ocean 55 poleward shift 55 temperate forests 55 subarctic regions 55 arctic 55 tidewater glacier 55 circumpolar 54 Syrtis Major 54 polar latitudes 54 terrestrial ecosystems 54 northern latitudes 54 Tuamotu Archipelago 54 climatic variability 54 Antarctic icecap 54 Antarctic Dry Valleys 54 NASA QuikScat satellite 54 volcanic plumes 54 POES satellites 54 icesheets 54 Gakkel Ridge 54 equatorial latitudes 54 Agulhas Current 54 ICESCAPE 54 polar ice 54 boreal regions 54 ENVISAT 54 basaltic rocks 54 Last Glacial Maximum 54 advection 54 hydrological cycle 54 laser altimeter 54 Nankai Trough Zone 54 upper troposphere 54 Transantarctic Mountains 54 MAR ECO 54 subtropical regions 54 alpine glaciers 54 NASA satellites orbiting 54 tidewater glaciers 54 mountain glaciers 53 oceans 53 AMASE 53 Ice Ages 53 IPY 53 surface temperatures SSTs 53 iceberg calving 53 thermal inertia 53 polarimetric 53 icecaps 53 Volker Liebig ESA 53 southernmost continent 53 atmospheric circulations 53 Qinghai Tibet Plateau 53 ESA Envisat 53 Artic Ocean 53 glaciations 53 deep convective clouds 53 Terra Meridiani 53 Planck satellite 53 Jupiter moons Europa 53 Earth orbiting satellites 53 Caloris 53 oceanic islands 53 paleoclimatic 53 Vastitas Borealis 53 Envisat 53 Hellas Planitia 53 Doomsday Seed Vault 53 Noctilucent clouds 53 SeaWiFS 53 coldest windiest 53 Subglacial 53 subsurface ocean 53 Tibetan Plateau 53 spatial variability 53 sub tropic 53 mineralogical composition 53 Alaskan glaciers 53 Triassic Jurassic 53 beech forests 53 biodiversity hotspots 53 tropics 53 solar irradiance 53 massifs 53 Martian polar 53 cyanobacterial blooms 53 glacier retreat 53 NASA rovers Spirit 53 solar corona 53 metocean 53 shadowed craters 53 oceanic 53 interannual variability 53 magnetic substorms 53 subglacial 52 auroral displays 52 glaciers 52 Saturnian moon Titan 52 Tropical rainforests 52 Sinus Meridiani 52 GIS remote sensing 52 Advanced Microwave Scanning 52 mesosphere 52 GOCE 52 Cassini flyby 52 icy moons 52 interglacial period 52 Antarctica EPICA 52 biomes 52 Galilean satellites 52 Barents Region 52 admiral asks 52 Antarctic Peninsula 52 Hindu Kush Himalaya 52 Jakobshavn Isbrae 52 flood basalts 52 infrared telescopes 52 tropical subtropical 52 sea hydrothermal vents 52 ICESat 52 multi decadal 52 meridional overturning circulation 52 NASA THEMIS 52 Cryogenian 52 glaciers icebergs 52 mantle convection 52 exoplanetary 52 AATSR 52 Earth Observation Programmes 52 HiRISE image 52 Paleoclimate 52 Quaternary Period 52 millimeter wavelengths 52 cosmic ray flux 52 Landsat satellites 52 GeoSAR 52 Qinghai Tibet plateau 52 Melting Arctic 52 tropical latitudes 52 permafrost 52 McMurdo Dry Valleys 52 Saharan Desert 52 boreal 52 Greenland icecap 52 palaeoclimate 52 Year IPY 51 teleconnections 51 Russ Hopcroft 51 polynya 51 Michael Studinger 51 AMSR E 51 benthos 51 axial tilt 51 Milankovitch cycles 51 Fram Strait 51 icecap 51 planetary surfaces 51 atmospheric phenomena 51 geodynamic 51 Vatnajokull 51 glacial retreat 51 biogeochemical cycles 51 Chilean Fjords 51 Great Observatories Origins 51 SMOS 51 moon Europa 51 hydrologic cycle 51 EPOCh 51 aerosol concentrations 51 noctilucent clouds 51 vegetation greenness 51 bathymetry 51 polynyas 51 permafrost degradation 51 Laptev Sea 51 Envisat satellites 51 warm interglacial periods 51 Mercury flyby 51 sedimentary deposits 51 albedo feedback 51 Sermilik Fjord 51 Boreal forests 51 lowermost mantle 51 coral habitats 51 Surface Temperature 51 refugia 51 Laurentide ice sheet 51 paleoclimate 51 equatorial waters 51 ENSO cycle 51 ecoregion 51 anthropogenic aerosols 51 Ozone Hole 51 warmer wetter winters 51 temperate latitudes 51 icefields 51 Moderate Resolution Imaging 51 remotely sensed 51 satellite altimetry 51 Svalbard archipelago 51 Antarctic glaciers 51 altimetry 51 permanently shadowed craters 51 inhospitable environments 51 springtime ozone 51 northerly latitudes 51 Imaging Spectroradiometer MODIS instrument 51 ° C warmer 51 Hellas Basin 51 NASA Landsat 51 Galapagos Archipelago 51 marine ecologists 51 tropopause 51 pika habitat 51 retreating glaciers 51 Saturn moon Enceladus 51 polar plateau 51 windiest continent 51 THEMIS Image 51 Marine Ecosystems 51 MODIS 51 Ontario Lacus 51 Envisat satellite 51 coccolithophores 51 Solar Dynamics Observatory 51 towering icebergs 51 poleward 51 Disko Bay 51 temperate regions 51 bedrock outcrops 51 Ny Alesund 51 glacier melt 51 glacial fjord 51 permanently shadowed 50 phytoplankton blooms 50 Late Paleozoic 50 atmospheric circulation 50 Cryogenian period 50 Permafrost 50 Juneau Icefield 50 Phenology 50 biodiverse ecosystems 50 autonomous Xinjiang Uyghur 50 Corot 9b 50 permafrost melts 50 Substorms 50 Ny Ålesund 50 Igor Semiletov 50 NanTroSEIZE 50 semiarid regions 50 equatorial Pacific Ocean 50 carbon fluxes 50 EVLA 50 Seafloor 50 melting permafrost 50 Climate Experiment GRACE 50 unmanned probes 50 seafloor sediments 50 Aeronomy 50 Herschel Space 50 upwellings 50 equatorial regions 50 mangrove ecosystems 50 glaciers recede 50 microbialites 50 Seamounts 50 interstellar boundary 50 hydrothermal vent 50 seamounts 50 Hubble orbits 50 lunar orbiters 50 paleomagnetic 50 mass beachings 50 Snowball Earth 50 Manned missions 50 climatologically 50 tropical coral reefs 50 subalpine meadows 50 atmospheric aerosols 50 Hindu Kush Himalayan 50 exoplanetary systems 50 dynamical processes 50 planets atmospheres 50 subseafloor 50 tides currents 50 abyssal plains 50 amplifying feedbacks 50 polar stratospheric 50 ° #'N 50 Atlantic meridional overturning 50 ADM Aeolus 50 polar craters 50 austral winter 50 anomalously warm 50 glacial geology 50 troposphere 50 Shuttle Radar Topography 50 ecosystems 50 planetary atmospheres 50 antarctic 50 EarthCARE 50 Late Ordovician 50 Aram Chaos 50 mantle plumes 50 Opposes drilling 50 circumpolar Arctic 50 CoML 50 temperate rainforest 50 Greenland Antarctica 50 estuarine ecology 50 telescopic observations 50 scatterometer 50 OrbView 50 stratospheric ozone 50 dense rainforests 50 penetrating radar 50 Nunavut Territory coal 50 stratospheric ozone depletion 50 BepiColombo 50 seafloor habitats 50 biogeochemical 50 Jay Lawrimore chief 50 Antartic 50 Palaeocene Eocene Thermal Maximum 50 Aqua Firma 49 Magellanic 49 galactic cosmic rays 49 Lake Vostok 49 warmings 49 climate modelers 49 remote sensing imagery 49 magnetospheric 49 Namib Desert 49 Svalbard Islands 49 harmful ultraviolet UV radiation 49 oligotrophic 49 seals walrus 49 RADARSAT 2 49 Svalbard 49 Mars Analog Svalbard 49 icescape 49 Remote sensing 49 coral reef degradation 49 glacial melt 49 geodynamics 49 Martian arctic 49 El Nino Southern Oscillation 49 polar orbiting satellites 49 subtropical oceans 49 phyllosilicates 49 Circumpolar 49 Caloris Basin 49 walrus polar bears 49 acidic oceans 49 ice nucleation 49 subglacial lake 49 ESA CryoSat 49 Rosetta spacecraft 49 dwelling organisms 49 altitudinal 49 Walruses dive 49 Vatnajökull 49 reef habitats 49 tundra vegetation 49 solar insolation 49 meteorological phenomena 49 Strathcona Fiord 49 rocky intertidal 49 auroral activity 49 Atacama Large Millimeter submillimeter 49 crustal movements 49 Ranging MESSENGER spacecraft 49 Antartica 49 Geosphere 49 Chilean fjords 49 geomicrobiology 49 Sisimiut 49 marine habitats 49 ostracods 49 ecliptic plane 49 geomorphology 49 Cryosat 49 Cretaceous periods 49 interglacials 49 marine ecosystems 49 celestial phenomena 49 Kola Peninsula 49 IceBridge 49 RAINEX 49 Solar Terrestrial Physics 49 infrared spectral 49 Super Earths 49 Microlensing 49 Seagrasses 49 exosphere 49 equatorial 49 Biogeography 49 glaciation 49 luminous galaxies 49 extratropical cyclones 49 active volcanism 49 volcanically active 49 Appy Sluijs 49 Medspiration 49 tropical troposphere 49 geosynchronous satellites 49 Pleistocene Ice Age 49 Martian surface 49 polar mesospheric clouds 49 Jonathan Lunine 49 golden toad 49 Arctic Circle 49 drylands 49 acidifying oceans 49 karst landscapes 49 albedo 49 chromosphere 49 glaciers retreated 49 biosignatures 49 Spectroradiometer 49 methane seeps 49 Meridiani 49 Southern Annular Mode 49 Venusian atmosphere 49 Permian extinction 49 Kristin Laidre 49 shadowy craters 49 oceanographic measurements 49 Mars Climate Sounder 49 polarimetry 49 supervolcanoes 49 Mars CRISM 49 Solar TErrestrial RElations Observatory 49 spectroscopic measurements 49 Phanerozoic 49 Arctic Shelf 49 icefield 49 equator 49 NWHI 49 nautical charting 49 temperature gradients 49 climate modellers 49 Southern Oscillation 49 Antarctic peninsula 49 Crozet Islands 49 MSL rover 49 paleoenvironmental 49 SST anomalies 49 TanDEM X 49 katabatic winds 49 Planitia 49 Taimyr Peninsula 49 mammal extinctions 49 biodiversity hotspot 49 Kiruna Sweden 49 martian surface 49 icefalls 49 heavily cratered 49 El Niños 49 Decadal 49 arid semi arid 49 Larsemann Hills 49 atmospheric CO2 levels 49 Jay Zwally 49 LRO spacecraft 49 Cosmic Microwave Background 49 observing satellites 48 Greenland Glaciers 48 Helheim glacier 48 Josefino Comiso 48 NuSTAR 48 Submersibles 48 interglacial periods 48 USArray 48 lunar equator 48 microwave radiometers 48 SMOS Soil Moisture 48 anthropogenic greenhouse gases 48 substorm 48 outer planets 48 Abdalati 48 downwelling 48 temperate grasslands 48 Eta Aquarid meteor shower 48 Shackleton crater 48 Earthscope 48 astrophysical objects 48 Geminid shower 48 deserts jungles 48 longwave radiation 48 temperature reconstructions 48 insolation 48 Mini SAR 48 climatology meteorology 48 infrared spectra 48 Landsat imagery 48 Cenozoic era 48 convective storms 48 hydrological cycles 48 prevailing westerly winds 48 infrared wavelength 48 cirrus clouds 48 Arabia Terra 48 ocean eddies 48 sulfate aerosols 48 Bindschadler 48 cosmic ray intensity 48 neutrino telescope 48 Cordillera Blanca 48 Landsat satellite 48 astrobiological 48 magnetotail 48 Coastal Ecosystems 48 GCMs 48 polar bears seals 48 Muchachos Observatory 48 aurorae 48 Troposphere 48 undersea volcanoes 48 Paleogene 48 landmasses 48 southerly latitudes 48 aerosol particles 48 Visit SPACE.com 48 Orbiter MRO 48 warmer wetter 48 photosynthetic organisms 48 VIRTIS 48 hematite mineral 48 droughts heatwaves floods 48 journal Meteoritics 48 lush tropical rainforests 48 Harding Icefield 48 abyssal plain 48 AKARI 48 temporal variability 48 yardangs 48 MERIS 48 El Niño Southern Oscillation 48 benthic foraminifera 48 meteor impacts 48 Chasma Boreale 48 hydrometeorological 48 flyby Cassini 48 temperate zones 48 coral reef biodiversity 48 Earth ionosphere 48 Davidson Seamount 48 Katharine Willett 48 aeolian 48 Svalbard Norway 48 GOES satellites 48 Amundsen Sea Embayment 48 mineral olivine 48 decadal 48 biogeographic 48 infrared astronomy 48 VISTA telescope 48 Mercury exosphere 48 fiords 48 diatom species 48 faunas 48 Kermadec Arc 48 pliosaur ferocious predator 48 asteroid impacts 48 NEAs 48 underwater volcanos 48 jovian 48 terrestrial biosphere 48 lunar perigee 48 Antarctic krill 48 fainter objects 48 Advanced Synthetic Aperture 48 multispectral imaging satellite 48 inhabitable planets 48 chlorophyll concentrations 48 boreal ecosystems 48 climatic phenomena 48 vesper bats 48 Cloud Aerosol Lidar 48 geoid 48 Waquoit Bay 48 Kerguelen Plateau 48 freshwater ecosystems 48 Orbiter LRO 48 Tromsø Norway 48 Arctic Coastal Plain 48 Warmer oceans 48 NASA Wilkinson Microwave 48 Total Ozone Mapping 48 Exoplanet 48 Palaeo 48 Hik 48 asteroids comets 48 permafrost thaws 48 driest continents 48 Infrared Pathfinder Satellite 48 Antarctic ice 48 subantarctic 48 interglacial 48 Isidis Planitia 48 SINFONI 48 Waleed Abdalati director 48 frozen wastelands 48 ionospheric disturbances 48 outer corona 48 NASA ICESat 48 Himalaya Karakoram 48 lunar poles 48 Melting glaciers 48 interferograms 48 HiRISE images 48 spatial scales 48 tropospheric 48 AIRS instrument 48 Tracy Arm fjord 48 cratered highlands 48 lowland plains 48 geomagnetism 48 Mesosphere 48 meteorite impacts 48 La Ninas 48 Greenland 48 planet Gliese #c 48 oceanographic 48 western Antarctic Peninsula 48 Kasatochi 48 orbiting gamma ray 48 Chukchi Cap 48 Melting Glaciers 48 comets asteroids 48 meteorological oceanographic 48 ozone depletion 48 Eemian 48 Aurora Expeditions 48 Cryosphere 48 Descent Imager Spectral Radiometer 48 Sable Gully 48 Smos 48 Prydz Bay 48 Indian Ocean Dipole 48 continental landmass 48 Hydrothermal Vents 48 SMOS satellite 48 sunspot cycles 48 migratory waterbirds 48 Lamont Doherty 48 comparative genomic analysis 48 snowcaps 48 barometric pressures 48 Novaya Zemlya 48 habitats 48 geologies 48 EarthScope 48 GloPac 48 ESO Paranal Observatory 48 cryovolcanism 48 icesheet 48 Magnetic Pole 48 semi arid regions 48 planet magnetosphere 48 Synthetic Aperture Radar SAR 48 Polarstern 48 Dronning Maud Land 47 radiative forcing 47 driest continent 47 retrograde orbit 47 Moderate Resolution 47 lunar meteorites 47 Siberian Traps 47 geology hydrology 47 Qinghai Tibetan Plateau 47 Comet Hartley 2 47 driest deserts 47 Gamburtsev 47 oceanic currents 47 Extinctions 47 spacecraft orbited 47 storms floods droughts 47 Saharan dust 47 Saturnian 47 freshwater estuaries 47 coastal marine ecosystems 47 Akademik Ioffe 47 Anvers Island 47 tiny single celled 47 denning habitat 47 ocean sediment cores 47 Hindu Kush Himalayas 47 intertidal zone 47 Contrails 47 albedo reflectivity 47 speleothems 47 marine biodiversity 47 smoothest flattest 47 paleoclimatologists 47 Weddell seals 47 Axel Heiberg Island 47 volcanic ridges 47 Hamish Pritchard 47 hyper spectral 47 awe inspiring landscapes 47 glaciated 47 Beaufort Seas 47 ASAR images 47 WAIS Divide 47 Uganda Rwenzori Mountains 47 Lake Yoa 47 Cerro Pachon 47 optical wavelengths 47 Global Precipitation Climatology 47 LOFAR telescope 47 icebergs drifting 47 polar voyages 47 extrasolar planetary systems 47 greenhouse warming 47 geosphere 47 Europa Ganymede 47 Seward Peninsula 47 Norway Svalbard 47 Chajnantor 47 meteorological satellites 47 THEMIS satellites 47 Mars northern latitudes 47 Titan Saturn 47 Mission SRTM 47 Sunspots 47 SPICAM 47 shrinking glaciers 47 abyssal 47 geomorphological 47 Namib Naukluft Park 47 Extrasolar 47 sunlike stars 47 Longyearbyen Norway 47 planktonic 47 hydrated minerals 47 ESA Integral 47 Surface Composition Spectrometer 47 Ilulissat Greenland 47 Geomorphology 47 HIAPER 47 La Nina occurs 47 GALEX 47 Waleed Abdalati 47 Polar Vortex 47 cyclonic storms 47 moon Enceladus 47 shrublands 47 Phytoplankton 47 constellation Eridanus 47 #.#oC [001] 47 Triassic Period 47 Beringia 47 IceCube Neutrino Observatory 47 Orbiting Carbon Observatory OCO 47 subalpine 47 Operation IceBridge 47 HRSC 47 IOOS 47 humid tropics 47 continental crust 47 continental rifting 47 bathymetric 47 Puijila 47 anthropogenically 47 STEREO spacecraft 47 gamma ray observatory 47 Foxe Basin 47 Ozone depletion 47 X ray telescopes 47 Soil Moisture 47 Mars Color Imager 47 glacial meltwater 47 oxidized mercury 47 Palmyra Atoll 47 Indo Gangetic plains 47 Terre Adelie 47 electron diffusion 47 TerraSAR X 47 Cape Floristic Region 47 biologically diverse ecosystems 47 geohazard 47 volcanic vents 47 chlorophyll fluorescence 47 dogsled expedition 47 CU Boulder LASP 47 glacial ice 47 anticyclones 47 Coral Reef Ecosystems 47 Ron O'Dor 47 VIRTIS instrument 47 hydrometeorology 47 Succulent Karoo 47 GFZ Potsdam 47 Kilimanjaro glaciers 47 subtropical gyre 47 gamma ray flashes 47 hydrothermal venting 47 KBOs 47 IYA# 47 wintering waterfowl 47 forams 47 hexagonal mirrors 47 floods droughts mudslides 47 Galactic Plane 47 Kuiper Belt Objects 47 auroral 47 extremophiles 47 oxygen isotopic 47 Atlantic Multidecadal Oscillation AMO 47 sun corona 47 delicate ecosystems 47 remote sensing 47 infrared spectrometers 47 multidecadal 47 Saturnian moon 47 Nili Fossae 47 Vesterålen 47 storminess 47 smoggy atmosphere 47 THEMIS mission 47 Milensky 47 montane forests 47 geology paleontology 47 Jupiter icy moons 47 Harmful algal blooms 47 visit http:/saturn.jpl.nasa.gov 47 GOES N 47 Radar ASAR 47 Artic 47 Jovian moons 47 arid regions 47 NOAA GOES 47 Velicogna 47 Saturn moon Mimas 47 Hubble Space Telescope HST 47 ultraviolet radiation emitted 47 drumlin 47 #.#C #.#C 47 Explorer WISE 47 Saturn Enceladus 47 ESA Mars 47 seabed sediments 47 ocean 47 Northern Hemisphere 47 ectotherms 47 aquatic ecosystems 47 Warmer seas 47 marine biota 47 mesoscale 47 sulfidic 47 isopods 47 Inuvialuit Settlement Region 47 arctic tundra 47 Svaliava 47 lowland forests 47 LISA Pathfinder 47 Venusian surface 47 Ian McShane Pillars 47 glacial interglacial cycles 47 lithosphere 47 Kittlitz murrelet 47 Svalbard islands 47 Envisat Advanced Synthetic Aperture 47 moons Phobos 47 astronomical observatories 47 Hunga Tonga 47 Bering Glacier 47 duration spaceflights 47 Elephant Seals 47 radio occultation 47 radiative cooling 47 Jakosky 47 biospheric 47 nowcasting 47 boreal forests 47 outlet glaciers 47 predator prey interactions 47 bryophytes 47 foraminifera 47 montane 47 presolar grains 47 Khumbu Glacier 47 Diatoms 47 HARPS instrument 47 lunar craters 47 Coral reef 47 supercontinent Pangaea 46 Brenda Ekwurzel climate 46 Satellites GOES 46 spatially resolved 46 ocean salinity 46 coral reef ecosystems 46 phytoplankton biomass 46 Okhotsk Sea 46 Volker Liebig 46 Changcheng Station 46 breeding waders 46 Papahānaumokuākea Marine National 46 temperate rainforests 46 coral reef ecosystem 46 Quaternary 46 Alaska Inside Passage 46 Gamma ray burst 46 bison lumbered 46 Qaanaaq 46 noctilucent 46 mountainous Altai 46 trawl fisheries 46 habitable zones 46 Tharsis Rise 46 Adélie penguins 46 Damaraland 46 Valles Marineris 46 silicic 46 Vostok Station 46 El Niño La Niña 46 Candor Chasma 46 thawing tundra 46 Saturnian moons 46 penguin rookery 46 Instrument OMI 46 CoRoT satellite 46 Turkana Basin 46 Cenozoic 46 occultations 46 AP Interview CG 46 atmospheric CO2 concentration 46 glacial melting 46 ocean ridges 46 Robert Bindschadler 46 Siberian Arctic 46 mildly alkaline