volcanic arc

Carbon emissions along divergent plate boundaries modulate icehouse-greenhouse climates

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The exchange of carbon between oceanic plates, the deep Earth, and the atmosphere plays a significant role in modulating global climate1,2. Icehouse-greenhouse climate fluctuations have been attributed to changes in palaeogeography and solid Earth degassing3, particularly along continental arcs2,4,5, to arc weathering5 and to the sequestration of carbon into oceanic carbonate-rich sediments6. However, the proportions … Read more…

Volcanoes acted as a safety valve for Earth’s long-term climate

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Volcanoes acted as a safety valve for Earth’s long-term climate The natural weathering of rocks on Earth’s surface over time is a crucial process for removing CO2 from the atmosphere Researchers have now used artificial intelligence to study interactions between land, sea and the atmosphere to determine the biggest drivers of this process over the … Read more…

Continental arcs dominate global chemical weathering

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Earth’s plate-tectonic activity regulates the carbon cycle and, hence, climate, via volcanic outgassing and silicate-rock weather- ing. Mountain building, arc–continent collisions and clustering of continents in the tropics have all been invoked as controlling the weathering flux, with arcs also acting as a major contributor of carbon dioxide to the atmosphere. However, these processes have … Read more…