Marine chemistry is the scientific study of the chemical composition, speciation, reactions, and biogeochemical cycles of substances in the marine environment, including seawater, sediments, and marine aerosols. It addresses the distributions and transformations of major, minor, and trace elements, dissolved gases, nutrients, and organic compounds, and how these are controlled by physical processes (mixing, circulation), biological activity (production, remineralization), and interactions with the atmosphere and lithosphere. Research in marine chemistry underpins understanding of ocean acidification, carbon cycling, redox dynamics, contaminant fate, and the chemical controls on marine ecosystems and climate-relevant processes.
A research team with scientists from MARUM—Center for Marine Environmental Sciences at the University of Bremen studied the hemispheric origin of Indonesian Throughflow (ITF) and found a high Southern Hemispheric contribution ...
Earth Sciences
Apr 20, 2026
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Oceans absorb roughly 25% to 30% of the carbon dioxide (CO2) that is released into the atmosphere. When this CO2 dissolves in seawater, it forms carbonic acid, making the water more acidic and altering its chemistry. Elevated ...
Ecology
Apr 14, 2026
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Scientists have found a new way to detect subtle chemical signatures in seawater, revealing previously invisible details about the ocean's chemistry from data continuously collected by thousands of autonomous robotic floats ...
Earth Sciences
Apr 6, 2026
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Researchers have uncovered new evidence that short-lived spikes in ocean phosphorus may have played a major role in two of the most severe marine extinctions in Earth's history. Dr. Matthew Dodd from The University of Western ...
Earth Sciences
Apr 1, 2026
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In Science of The Total Environment, researchers demonstrate the broad distribution of particulate thiols in the western North Pacific and show that their main source is marine phytoplankton. The analysis indicates that differences ...
Earth Sciences
Mar 22, 2026
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Scientists have long sought to explain a key mismatch in Earth's early history: oxygen-producing photosynthesis evolved hundreds of millions of years before atmospheric oxygen began to rise during the Great Oxidation Event. ...
Earth Sciences
Mar 19, 2026
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The rocks beneath our feet are leaving a hidden signature in the shells of marine snails along Australia's ancient coastline, according to new research led by Adelaide University scientists. A study published in Proceedings ...
Ecology
Mar 18, 2026
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Research from the Department of Environmental Health Sciences explores how common sunscreen ingredients behave under light exposure. Led by associate professor Eric Vejerano, the team tested seven commercially available sunscreens ...
Environment
Mar 17, 2026
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The ocean naturally absorbs CO₂ from the atmosphere, acting as a carbon sink. This capacity is determined by a natural chemical property referred to as ocean alkalinity. If the alkalinity increases, the ocean has the potential ...
Plants & Animals
Mar 17, 2026
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A global analysis of more than 2,300 seawater samples from more than 20 field studies around the globe indicates that human-made chemicals make up a significant portion of organic matter in coastal oceans. The international ...
Earth Sciences
Mar 16, 2026
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