Related by context. Frequent words. (Click for all words.) 61 Serreze 58 Pielke 57 Amstrup 54 atmospheric CO2 54 Lindzen 53 glacial melt 53 Landsea 51 greenhouse warming 51 CO2 concentrations 51 NSIDC 50 IPCC 50 sunspot cycle 50 ocean acidity 50 Meehl 50 sunspot activity 50 Pachauri 49 Revkin 49 greenhouse gas concentrations 49 Lomborg 49 Birol 49 Climate Change IPCC 48 gigatonnes 48 decadal 48 Medieval Warm Period 48 atmospheric carbon dioxide 48 Greenland glaciers 48 atmospheric concentrations 48 anthropogenic climate 47 Geoengineering 47 interglacial 47 Bjorn Lomborg 47 Steig 47 glaciologist 47 extinctions 47 glacier melt 47 Greenland ice 47 Nature Geoscience 47 Dr Pachauri 47 Little Ice Age 46 climatologists 46 Millennium Ecosystem Assessment 46 MWP 46 WEO 46 anthropogenic 46 Finnish Meteorological 45 hydrological cycle 45 species extinctions 45 Himalayan glaciers 45 atmospheric circulation 45 El Ninos 45 Greenland Ice 45 Monbiot 45 mountain glaciers 45 ozone depletion 45 #ppm [001] 45 journal Nature Geoscience 45 ocean acidification 45 ENSO 44 Climatology 44 Computer simulations 44 University Lamont Doherty 44 mid latitudes 44 theoretical calculations 44 Trenberth 44 gigatons 44 UN Intergovernmental Panel 44 monsoon rainfall 44 de Boer 44 terrestrial ecosystems 44 glaciers 44 WMO 44 Caldeira 44 Hatzius 43 journal Geophysical Research 43 hotter summers 43 Diffenbaugh 43 Worldwatch 43 Kevin Trenberth 43 climatological 43 Ocean acidification 43 Nordhaus 43 global warming 43 acidification 43 albedo 43 Climatologist 43 polar caps 43 Takle 43 mass extinctions 43 climate change 42 Jarraud 42 Klotzbach 42 oceanographers 42 Icelandic Meteorological Office 42 Overpeck 42 Tuomioja 42 Derocher 42 diatoms 42 Pliocene 42 Lautenbacher 42 methane hydrate 42 glaciation