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Fully updated and expanded, this new edition provides students with an accessible introduction to marine chemistry. It highlights geochemical interactions between the ocean, solid earth, atmosphere and climate, enabling students to appreciate the interconnectedness of Earth's processes and systems and elucidates the huge variations in the oceans' chemical environment, from surface waters to deep water. Written in a clear, engaging way, the book provides students in oceanography, marine chemistry and biogeochemistry with the fundamental tools they need for a strong understanding of ocean chemistry. Appendices present information on seawater properties, key equations and constants for calculating oceanographic processes. New to this edition are end-of-chapter problems for students to put theory into practice, summaries to allow easy review of material and a comprehensive glossary. Supporting online resources include solutions to problems and figures from the book. Table of Contents Preface 1. Introduction 2. The water in seawater 3. Salinity, chlorinity, conductivity, and density 4. Major constituents of seawater 5. Simple gases 6. Salts in solution 7. Carbon dioxide 8. Nutrients 9. Trace metals and other minor elements 10. Radioactive clocks 11. Organic matter in the sea 12. Anoxic marine environments 13. Exchanges at the boundaries 14. Chemical extraction of useful substances from the sea 15. Geochemical history of the oceans Appendix A. The chemical elements Appendix B. Symbols, units, and nomenclature Appendix C. Physical properties of seawater Appendix D. Gases Appendix E. Carbon dioxide Appendix F. Dissociation constants and pH scales Appendix G. Solubility of calcium carbonate Appendix H. Effects of pressure Appendix I. Radioactive decay Appendix J. Geochemical reservoirs, and some rates Appendix K. Sound absorption Glossary References Index.