Volume 90 Issue 30 | p. 30 | Concentrates
Issue Date: July 23, 2012

Geologic Sulfur Cycle Reexamined

Sulfur-based biogeochemistry is more variable than previously recognized
Department: Science & Technology
News Channels: Environmental SCENE
Keywords: ocean chemistry, marine chemistry, sulfate, sulfide, carbon cycle, aerosols, climate

Earth’s sulfur cycle is more varied and has greater effects on marine chemistry, the carbon cycle, atmospheric oxygen levels, and climate than previously realized, according to two reports in Science (DOI: 10.1126/science.1220656 and 10.1126/science.1220224). Sulfate from dissolved minerals such as an­hydrite (CaSO4) or from oxidative weathering of pyrite (FeS2) gets carried by rivers into . . .

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