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Tracking carbon from subduction to outgassing along the Aleutian-Alaska Volcanic Arc.
Lopez, Taryn; Fischer, Tobias P; Plank, Terry; Malinverno, Alberto; Rizzo, Andrea L; Rasmussen, Daniel J; Cottrell, Elizabeth; Werner, Cynthia; Kern, Christoph; Bergfeld, Deborah; Ilanko, Tehnuka; Andrys, Janine L; Kelley, Katherine A.
Afiliación
  • Lopez T; Geophysical Institute, University of Alaska Fairbanks, Fairbanks, AK, USA.
  • Fischer TP; Alaska Volcano Observatory, UAF Geophysical Institute, Fairbanks, AK, USA.
  • Plank T; University of New Mexico, Albuquerque, NM, USA.
  • Malinverno A; Lamont Doherty Earth Observatory, Columbia University, Palisades, NY, USA.
  • Rizzo AL; Lamont Doherty Earth Observatory, Columbia University, Palisades, NY, USA.
  • Rasmussen DJ; Istituto Nazionale di Geofisica e Vulcanologia, Sezione di Milano, Milano, Italy.
  • Cottrell E; Department of Earth and Environmental Sciences, University of Milano-Bicocca, Milano, Italy.
  • Werner C; Lamont Doherty Earth Observatory, Columbia University, Palisades, NY, USA.
  • Kern C; Department of Mineral Sciences, National Museum of Natural History Smithsonian Institution, Washington, DC, USA.
  • Bergfeld D; Department of Mineral Sciences, National Museum of Natural History Smithsonian Institution, Washington, DC, USA.
  • Ilanko T; U.S. Geological Survey Contractor, New Plymouth, New Zealand.
  • Andrys JL; Cascades Volcano Observatory, U.S. Geological Survey, Vancouver, WA, USA.
  • Kelley KA; California Volcano Observatory, U.S. Geological Survey, Moffett Field, CA, USA.
Sci Adv ; 9(26): eadf3024, 2023 Jun 28.
Article en En | MEDLINE | ID: mdl-37379389
Subduction transports volatiles between Earth's mantle, crust, and atmosphere, ultimately creating a habitable Earth. We use isotopes to track carbon from subduction to outgassing along the Aleutian-Alaska Arc. We find substantial along-strike variations in the isotopic composition of volcanic gases, explained by different recycling efficiencies of subducting carbon to the atmosphere via arc volcanism and modulated by subduction character. Fast and cool subduction facilitates recycling of ~43 to 61% sediment-derived organic carbon to the atmosphere through degassing of central Aleutian volcanoes, while slow and warm subduction favors forearc sediment removal, leading to recycling of ~6 to 9% altered oceanic crust carbon to the atmosphere through degassing of western Aleutian volcanoes. These results indicate that less carbon is returned to the deep mantle than previously thought and that subducting organic carbon is not a reliable atmospheric carbon sink over subduction time scales.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Sci Adv Año: 2023 Tipo del documento: Article País de afiliación: Estados Unidos Pais de publicación: Estados Unidos
Texto completo
Añadir a Mi BVS
Imprimir
XML
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Sci Adv Año: 2023 Tipo del documento: Article País de afiliación: Estados Unidos Pais de publicación: Estados Unidos