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  • AGU (American Geophysical Union)  (1)
  • Newark :John Wiley & Sons, Incorporated,  (1)
  • 1
    Online Resource
    Online Resource
    Newark :John Wiley & Sons, Incorporated,
    Keywords: Environmental geochemistry. ; Electronic books.
    Type of Medium: Online Resource
    Pages: 1 online resource (325 pages)
    Edition: 2nd ed.
    ISBN: 9781444312379
    Language: English
    Note: An Introduction to Environmental Chemistry, SECOND EDITION -- Contents -- Boxes -- Preface to the Second Edition -- Preface to the First Edition -- Acknowledgements -- Symbols and Abbreviations -- 1: Introduction -- 1.1 What is environmental chemistry? -- 1.2 In the beginning -- 1.3 Origin and evolution of the Earth -- 1.3.1 Formation of the crust and atmosphere -- 1.3.2 The hydrosphere -- 1.3.3 The origin of life and evolution of the atmosphere -- 1.4 Human effects on biogeochemical cycles? -- 1.5 The structure of this book -- 1.6 Internet keywords -- 1.7 Further reading -- 1.8 Internet search keywords -- 2: Environmental Chemist's Toolbox -- 2.1 About this chapter -- 2.2 Order in the elements? -- 2.3 Bonding -- 2.3.1 Covalent bonds -- 2.3.2 Ionic bonding, ions and ionic solids -- 2.4 Using chemical equations -- 2.5 Describing amounts of substances: the mole -- 2.6 Concentration and activity -- 2.7 Organic molecules - structure and chemistry -- 2.7.1 Functional groups -- 2.7.2 Representing organic matter in simple equations -- 2.8 Radioactivity of elements -- 2.9 Finding more chemical tools in this book -- 2.10 Further reading -- 2.11 Internet search keywords -- 3: The Atmosphere -- 3.1 Introduction -- 3.2 Composition of the atmosphere -- 3.3 Steady state or equilibrium? -- 3.4 Natural sources -- 3.4.1 Geochemical sources -- 3.4.2 Biological sources -- 3.5 Reactivity of trace substances in the atmosphere -- 3.6 The urban atmosphere -- 3.6.1 London smog - primary pollution -- 3.6.2 Los Angeles smog - secondary pollution -- 3.6.3 21st-century particulate pollution -- 3.7 Air pollution and health -- 3.8 Effects of air pollution -- 3.9 Removal processes -- 3.10 Chemistry of the stratosphere -- 3.10.1 Stratospheric ozone formation and destruction -- 3.10.2 Ozone destruction by halogenated species -- 3.10.3 Saving the ozone layer. , 3.11 Further reading -- 3.12 Internet search keywords -- 4: The Chemistry of Continental Solids -- 4.1 The terrestrial environment, crust and material cycling -- 4.2 The structure of silicate minerals -- 4.2.1 Coordination of ions and the radius ratio rule -- 4.2.2 The construction of silicate minerals -- 4.2.3 Structural organization in silicate minerals -- 4.3 Weathering processes -- 4.4 Mechanisms of chemical weathering -- 4.4.1 Dissolution -- 4.4.2 Oxidation -- 4.4.3 Acid hydrolysis -- 4.4.4 Weathering of complex silicate minerals -- 4.5 Clay minerals -- 4.5.1 One to one clay mineral structure -- 4.5.2 Two to one clay mineral structure -- 4.6 Formation of soils -- 4.6.1 Parent (bedrock) material (p) -- 4.6.2 Climate (cl) -- 4.6.3 Relief (r) -- 4.6.4 Vegetation (v) -- 4.6.5 Influence of organisms (o) -- 4.7 Wider controls on soil and clay mineral formation -- 4.8 Ion exchange and soil pH -- 4.9 Soil structure and classification -- 4.9.1 Soils with argillic horizons -- 4.9.2 Spodosols (podzols) -- 4.9.3 Soils with gley horizons -- 4.10 Contaminated land -- 4.10.1 Organic contaminants in soils -- 4.10.2 Degradation of organic contaminants in soils -- 4.10.3 Remediation of contaminated land -- 4.10.4 Phytoremediation -- 4.11 Further reading -- 4.12 Internet search keywords -- 5: The Chemistry of Continental Waters -- 5.1 Introduction -- 5.2 Element chemistry -- 5.3 Water chemistry and weathering regimes -- 5.3.1 Alkalinity, dissolved inorganic carbon and pH buffering -- 5.4 Aluminium solubility and acidity -- 5.4.1 Acidification from atmospheric inputs -- 5.4.2 Acid mine drainage -- 5.4.3 Recognizing acidification from sulphate data - ternary diagrams -- 5.5 Biological processes -- 5.5.1 Nutrients and eutrophication -- 5.6 Heavy metal contamination -- 5.6.1 Mercury contamination from gold mining -- 5.7 Contamination of groundwater. , 5.7.1 Anthropogenic contamination of groundwater -- 5.7.2 Natural arsenic contamination of groundwater -- 5.8 Further reading -- 5.9 Internet search keywords -- 6: The Oceans -- 6.1 Introduction -- 6.2 Estuarine processes -- 6.2.1 Aggregation of colloidal material in estuaries -- 6.2.2 Mixing processes in estuaries -- 6.2.3 Halmyrolysis and ion exchange in estuaries -- 6.2.4 Microbiological activity in estuaries -- 6.3 Major ion chemistry of seawater -- 6.4 Chemical cycling of major ions -- 6.4.1 Sea-to-air fluxes -- 6.4.2 Evaporites -- 6.4.3 Cation exchange -- 6.4.4 Calcium carbonate formation -- 6.4.5 Opaline silica -- 6.4.6 Sulphides -- 6.4.7 Hydrothermal processes -- 6.4.8 The potassium problem: balancing the seawater major ion budget -- 6.5 Minor chemical components in seawater -- 6.5.1 Dissolved gases -- 6.5.2 Dissolved ions -- 6.5.3 Conservative behaviour -- 6.5.4 Nutrient-like behaviour -- 6.5.5 Scavenged behaviour -- 6.6 The role of iron as a nutrient in the oceans -- 6.7 Ocean circulation and its effects on trace element distribution -- 6.8 Anthropogenic effects on ocean chemistry -- 6.8.1 Human effects on regional seas 1: the Baltic -- 6.8.2 Human effects on regional seas 2: the Gulf of Mexico -- 6.8.3 Human effects on total ocean minor element budgets -- 6.9 Further reading -- 6.10 Internet search keywords -- 7: Global Change -- 7.1 Why study global-scale environmental chemistry? -- 7.2 The carbon cycle -- 7.2.1 The atmospheric record -- 7.2.2 Natural and anthropogenic sources and sinks -- 7.2.3 The global budget of natural and anthropogenic carbon dioxide -- 7.2.4 The effects of elevated carbon dioxide levels on global temperature and other properties -- 7.3 The sulphur cycle -- 7.3.1 The global sulphur cycle and anthropogenic effects -- 7.3.2 The sulphur cycle and atmospheric acidity -- 7.3.3 The sulphur cycle and climate. , 7.4 Persistent organic pollutants -- 7.4.1 Persistent organic pollutant mobility in the atmosphere -- 7.4.2 Global persistent organic polllutant equilibrium -- 7.5 Further reading -- 7.6 Internet search keywords -- Index -- Color plates.
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  • 2
    Publication Date: 2020-11-04
    Description: The global tropospheric budget of gaseous and particulate non-methane organic matter (OM) is re-examined to provide a holistic view of the role that OM plays in transporting the essential nutrients nitrogen and phosphorus to the ocean. A global 3-dimensional chemistry-transport model was used to construct the first global picture of atmospheric transport and deposition of the organic nitrogen (ON) and organic phosphorus (OP) that are associated with OM, focusing on the soluble fractions of these nutrients. Model simulations agree with observations within an order of magnitude. Depending on location, the observed water soluble ON fraction ranges from similar to 3% to 90% (median of similar to 35%) of total soluble N in rainwater; soluble OP ranges from similar to 20-83% (median of similar to 35%) of total soluble phosphorus. The simulations suggest that the global ON cycle has a strong anthropogenic component with similar to 45% of the overall atmospheric source (primary and secondary) associated with anthropogenic activities. In contrast, only 10% of atmospheric OP is emitted from human activities. The model-derived present-day soluble ON and OP deposition to the global ocean is estimated to be similar to 16 Tg-N/yr and similar to 0.35 Tg-P/yr respectively with an order of magnitude uncertainty. Of these amounts similar to 40% and similar to 6%, respectively, are associated with anthropogenic activities, and 33% and 90% are recycled oceanic materials. Therefore, anthropogenic emissions are having a greater impact on the ON cycle than the OP cycle; consequently increasing emissions may increase P-limitation in the oligotrophic regions of the world's ocean that rely on atmospheric deposition as an important nutrient source.
    Type: Article , PeerReviewed
    Format: text
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