Related by context. Frequent words. (Click for all words.) 56 hydrologic cycle 55 phytoplankton blooms 54 acidify 54 atmospheric methane 53 isotopic composition 53 sulphates 53 biogenic 53 terrestrial ecosystems 53 plankton blooms 52 hydrological cycle 52 carbonic acid 52 acidifying 51 iron oxides 51 isotope ratios 50 aerosol particles 50 nitrification 50 upwellings 50 atmospheric nitrogen 50 biogeochemical 50 absorbs carbon dioxide 50 Sediments 50 naturally occurring mineral 49 potent greenhouse gas 49 Equatorial Pacific 49 freshwater ecosystems 49 Phytoplankton 49 nutrients 49 aragonite 49 abundances 49 deglaciation 49 salinity 49 oxygen isotopes 48 osmium 48 silts 48 trace minerals 48 nutrient 48 otolith 48 phytoplankton 48 glacial melt 48 nitrogen 48 bioaccumulation 48 acidification 47 marine sediments 47 micronutrient 47 ocean acidity 47 elemental composition 47 deplete oxygen 47 atmospheric CO2 47 albedo 47 hydrothermal activity 47 acidified 47 nutrient rich 47 diatoms 47 oxidising 47 Melting glaciers 47 Nitrogen oxides 46 biogeochemistry 46 macronutrients 46 microscopic algae 46 soil salinity 46 absorbing carbon dioxide 46 sulphate 46 atmospheric CO 46 lavas 46 nitrogen phosphorous 46 solar nebula 46 mineral salts 46 nitrogen fixation 46 CH4 46 ocean salinity 46 Arctic permafrost 46 meteorite impacts 46 sediments 46 tropospheric 46 sediment cores 45 planktonic 45 sulfate 45 Ocean acidification 45 olivine 45 solar irradiance 45 calcium carbonate 45 isoprene 45 lake sediments 45 nutrient loading 45 temperature gradient 45 Nutrients 45 nitrogen phosphorus 45 amphipods 45 oceans 45 potent neurotoxin 45 iron fertilization 45 poleward 45 clathrates 45 pollutants 45 potassium magnesium 45 magmas 45 lithosphere 45 Ultraviolet radiation 45 acidic soils 44 polar caps 44 ultra violet radiation