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    Por favor, use este identificador para citar o enlazar este ítem:https://uvadoc.uva.es/handle/10324/64484

    Título
    Climatic and biogeochemical controls on the remobilization and reservoirs of persistent organic pollutants in Antarctica
    Autor
    Cabrerizo Pastor, Ana
    Dachs, Jordi
    Barceló, Damià
    Jones, Kevin C.
    Año del Documento
    2013
    Editorial
    ACS (American Chemical Society)
    Descripción
    Producción Científica
    Documento Fuente
    Environmental Science & Technology April, 2013, vol. 47, n. 9, p. 4299-4306
    Résumé
    After decades of primary emissions, reservoirs of persistent organic pollutants (POPs) have accumulated in soils and snow/ice in polar regions. These reservoirs can be remobilized due to decreasing primary emissions or due to climate change-driven warmer conditions. Results from a sampling campaign carried out at Livingston Island (Antarctica) focusing on field measurements of air–soil exchange of POPs show that there is a close coupling of the polychlorinated biphenyls (PCBs) in the atmosphere and snow/ice and soils with a status close to air–surface equilibrium to a net volatilization from Antarctic reservoirs. This remobilization of PCBs is driven by changes in temperature and soil organic matter (SOM) content, and it provides strong evidence that the current and future remobilization and sinks of POPs are a strong function of the close coupling of climate change and carbon cycling in the Antarctic region and this is not only due to warming. Whereas an increase of 1 °C in ambient temperature due to climate change would increase current Antarctic atmospheric inventories of PCBs by 21–45%, a concurrent increase of 0.5% SOM would counteract the influence of warming by reducing the POP fugacity in soil. A 1 °C increase in Antarctic temperatures will induce an increase of the soil–vegetation organic carbon and associated POPs pools by 25%, becoming a net sink of POPs, and trapping up to 70 times more POPs than the amount remobilized to the atmosphere. Therefore, changes in soil biogeochemistry driven by perturbations of climate may increase to a larger degree the soil fugacity capacity than the decrease in air and soil fugacity capacity due to higher temperatures. Future research should focus on quantifying these remobilization fluxes and sinks for the Antarctic region.
    Palabras Clave
    Atmospheric chemistry
    Fugacity
    Organic compounds
    Phenyls
    Soils
    ISSN
    0013-936X
    Revisión por pares
    SI
    DOI
    10.1021/es400471c
    Patrocinador
    This research project was funded by the Spanish Ministry of Science and Innovation through the ATOS project (National Project) as part of the International Polar Year activities
    Version del Editor
    https://pubs.acs.org/doi/10.1021/es400471c
    Propietario de los Derechos
    American Chemical Society
    Idioma
    eng
    URI
    https://uvadoc.uva.es/handle/10324/64484
    Tipo de versión
    info:eu-repo/semantics/publishedVersion
    Derechos
    openAccess
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