Related by context. Frequent words. (Click for all words.) 55 Medieval Warm Period 52 ENSO 52 sediment cores 52 Landsea 52 CO2 concentrations 52 climatologists 51 decadal 51 lake sediments 51 Serreze 51 greenhouse warming 51 streamflow 51 atmospheric circulation 51 glaciation 50 abundances 50 climatology 50 NSIDC 50 atmospheric CO2 50 Pielke 49 reanalysis 49 journal Geology 49 climatological 49 Little Ice Age 48 radiocarbon 48 mid latitudes 48 GISS 48 sunspot activity 48 computer simulations 48 reconstructions 48 El Ninos 48 albedo 47 Nature Geoscience 47 atmospheric chemistry 47 anthropogenic climate 47 polar caps 46 landforms 46 glaciologists 46 Quaternary 46 polar regions 46 Climatology 46 permafrost 46 Astrobiology 45 polar 45 astronomical observations 45 theoretical calculations 45 radiocarbon dating 45 atmospheric carbon dioxide 45 Millennium Ecosystem Assessment 44 greenhouse gas concentrations 44 volcanism 44 anthropogenic 44 geologic 44 geomagnetic 44 glacial melt 44 journal Nature Geoscience 44 Geophysical Research 44 Measurements 44 plate tectonics 44 correlations 44 World Meteorological Organization 44 measurements 44 Northern Hemisphere 44 Permafrost 44 tectonics 44 anomalously 43 Tibetan Plateau 43 epidemiologic studies 43 latitudes 43 dynamical 43 British Antarctic Survey 43 NIWA 43 National Climatic Data 43 oceanographers 43 global warming skeptics 43 Geochemistry 43 nitrogen fixation 43 taxa 43 variability 43 isotopic 43 anthropogenic global warming 43 atmospheric sciences 43 CRU 43 amplitudes 43 Holocene 43 Greenland Ice 43 mass extinctions 43 evapotranspiration 43 Atmospheric Science 43 datasets 42 mountain glaciers 42 Climatologists 42 journal Geophysical Research 42 thermodynamic 42 paleontological 42 scientists 42 laboratory experiments 42 Pliocene 42 mineralogy 42 global warming alarmists 42 Greenland ice 42 equatorial regions 42 synoptic