Related by context. Frequent words. (Click for all words.) 55 Pielke 55 Serreze 54 Michael A'Hearn 53 Mark Serreze 52 NSIDC 52 Scambos 52 glacial melting 51 Colaprete 51 A'Hearn 50 planetary scientist 49 substorms 49 polar regions 49 Landsea 49 glacial melt 49 atmospheric chemistry 49 hydrological cycle 48 Samantha Joye 48 British Antarctic Survey 48 Polar Regions 48 MARSIS 48 ICIMOD 48 Trenberth 48 Amstrup 48 climatologists 47 atmospheric sciences 47 glaciologists 47 IPY 47 Cassini imaging 47 anthropogenic climate 47 glaciers 47 scientists 47 Hadow 47 Greenland glaciers 47 glaciologist 46 Nature Geoscience 46 Astrobiology 46 Earth Observing 46 meteoroid 46 HiRISE 46 atmospheric carbon dioxide 46 astrobiologist 46 Phil Klotzbach 46 CloudSat 46 ICESat 46 Cabeus crater 46 Cassini Huygens 46 aerosol particles 46 astrophysical 45 Jarraud 45 astrobiologists 45 greenhouse warming 45 polar caps 45 journal Geophysical Research 45 magnetosphere 45 galaxy formation 45 University Lamont Doherty 45 climatological 45 melting permafrost 45 terrestrial ecosystems 45 Earth magnetosphere 45 Philip Klotzbach 45 Climate Impact Assessment 45 USGS 45 NOAA Climate Prediction 45 climatology 45 Barrie Hartman 45 Michel Jarraud 45 gas hydrates 45 Martian arctic 45 methane hydrate 45 Mars Odyssey 45 methane hydrates 45 planetary science 45 Earth Observation 44 geomorphology 44 CryoSat 44 atmospheric CO 44 Meehl 44 polar ice 44 Geophysical Research 44 Greenland ice 44 mid latitudes 44 polar 44 interplanetary spacecraft 44 geosciences 44 Lautenbacher 44 Kevin Trenberth 44 COROT 44 atmospheric circulation 44 Atmospheric Research 44 Mike Suffredini NASA 44 Atmospheric Science 44 Klotzbach 44 Cassini 44 Lubchenco 44 Planetary Sciences 44 Planetary Laboratory 44 NASA 44 moon Europa 44 stratospheric ozone 44 atmospheric CO2