Related by context. Frequent words. (Click for all words.) 56 Pielke 54 greenhouse warming 52 Lindzen 52 Lomborg 51 atmospheric scientist 50 Bjorn Lomborg 49 geoscientist 49 atmospheric carbon dioxide 49 Revkin 48 atmospheric chemistry 48 gigatonnes 48 Climatologist 47 climatologists 47 Nature Geoscience 47 Ausubel 47 Serreze 47 James Lovelock 47 global warming skeptic 47 radiative forcing 47 forest ecologist 47 climate modelers 46 climate change 46 anthropogenic climate 46 anthropogenic 46 global warming 46 atmospheric CO2 46 journal Geophysical Research 46 Mark Serreze 46 atmospheric sciences 46 Geoengineering 46 glacial melt 46 Landsea 46 biogeochemistry 46 Amstrup 45 NSIDC 45 scientist 45 marine ecologist 45 planetary scientist 45 geochemist 45 Trenberth 45 Skeptical Environmentalist 45 ocean acidity 45 CO2 concentrations 45 Patzert 45 hydrological cycle 45 climatology 44 planetary sciences 44 Joseph Romm 44 climatologist 44 atmospheric methane 44 Plant Biology 44 Atmospheric Science 44 carbon sequestration 44 geographer 44 University Lamont Doherty 44 glaciers melt 44 climate alarmists 44 gigatons 44 albedo 44 global warming alarmists 43 ocean acidification 43 Little Ice Age 43 geosciences 43 Carnegie Institution 43 Worldwatch 43 geoengineering 43 Lamont Doherty Earth 43 geomorphology 43 nitrogen fixation 43 atmospheric CO 42 carbon sinks 42 Geochemistry 42 Atmospheric Sciences 42 Niels Bohr Institute 42 methane hydrate 42 greenhouse gas concentrations 42 IHS CERA 42 Hatzius 42 Happer 42 geophysicist 42 glaciologist 42 Pachauri 42 Joel Makower 42 AR4 41 Climate Change 41 Climate Change IPCC 41 Monbiot 41 Dr Pachauri 41 plant physiologist 41 Climatologists 41 Kevin Trenberth 41 Greenhouse Gases 41 forest ecosystems 41 atmospheric concentrations 41 greenhouse gasses 41 Caldeira 41 melting permafrost 41 scientists 41 sunspot activity 41 Ocean acidification 41 isoprene