Related by context. Frequent words. (Click for all words.) 51 Permafrost 49 NSIDC 49 mountain glaciers 48 admiral asks 48 Climate Impact Assessment 48 AP Interview CG 47 Greenland ice 47 Mark Serreze 47 freshwater ecosystems 47 atmospheric methane 46 Ozone layer 46 Worldwatch 46 Scambos 46 Polar Regions 46 Norwegian Polar 46 gigatonnes 46 Serreze 45 Antarctic ice 45 Greenland Ice 45 Finnish Meteorological 45 O'Dor 45 polar ice 44 climate modelers 44 Antarctic Ice 44 glaciers 44 icecaps 44 cryosphere 44 Arctic 44 Arctic Ocean 44 foraminifera 44 terrestrial ecosystems 44 Arctic permafrost 44 Weddell Sea 43 marine ecosystems 43 seamounts 43 Phytoplankton 43 stratospheric ozone 43 oceans 43 Amstrup 43 permafrost 43 boreal 43 Niels Bohr Institute 43 Greenland glaciers 42 coral reef ecosystems 42 biological oceanographer 42 Carbon Dioxide 42 acidification 42 melting permafrost 42 ocean ecosystems 42 boreal forests 42 ocean acidity 42 WAIS 42 glacier melt 42 marine sediments 42 methane hydrates 42 Henry Hou 42 ecosystems 42 sediment cores 42 greenhouse gas concentrations 41 Antarctic 41 glacial melting 41 Roger Pielke Jr. 41 Tibetan Plateau 41 polar caps 41 Boreal Forest 41 glacial lakes 41 oceanographers 41 Antarctica 41 biodiversity hotspots 41 worsening droughts 41 lithosphere 41 biota 41 Derocher 41 atmospheric CO 41 Millennium Ecosystem Assessment 40 coastal ecosystems 40 coral reefs 40 Nature Geoscience 40 protective ozone layer 40 gigatons 40 atmospheric concentrations 40 mid latitudes 40 atmospheric CO2 40 amphibian populations 40 ICESat 40 Antarctic Peninsula 40 CO2 concentrations 40 aquatic ecosystems 40 lowland forests 40 biogeochemistry 40 polar regions 40 Climate Prediction 40 Edwin Lyman 40 journal Geophysical Research 40 World Meteorological Organization 40 atmospheric carbon dioxide 40 species extinctions 39 degrees Fahrenheit warmer 39 glaciers melting 39 glacial ice 39 Ecology Letters