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    Individual particle morphology, coatings, and impurities of black carbon aerosols in Antarctic ice and tropical rainfall

    247201.pdf (4.672Mb)
    Access Status
    Open access
    Authors
    Ellis, A.
    Edwards, R.
    Saunders, M.
    Chakrabarty, R.
    Subramanian, R.
    Timms, N.
    Van Riessen, Arie
    Smith, A.
    Lambrinidis, D.
    Nunes, L.
    Vallelonga, P.
    Goodwin, I.
    Moy, A.
    Curran, M.
    van Ommen, T.
    Date
    2016
    Type
    Journal Article
    
    Metadata
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    Citation
    Ellis, A. and Edwards, R. and Saunders, M. and Chakrabarty, R. and Subramanian, R. and Timms, N. and Van Riessen, A. et al. 2016. Individual particle morphology, coatings, and impurities of black carbon aerosols in Antarctic ice and tropical rainfall. Geophysical Research Letters. 43 (22): pp. 11-883.
    Source Title
    Geophysical Research Letters
    DOI
    10.1002/2016GL071042
    ISSN
    0094-8276
    School
    John de Laeter CoE in Mass Spectrometry
    Funding and Sponsorship
    http://purl.org/au-research/grants/arc/LE130100029
    Remarks

    Copyright © 2016 The American Geophysical Union

    URI
    http://hdl.handle.net/20.500.11937/32106
    Collection
    • Curtin Research Publications
    Abstract

    © 2016 American Geophysical Union. All Rights Reserved. Black carbon (BC) aerosols are a large source of climate warming, impact atmospheric chemistry, and are implicated in large-scale changes in atmospheric circulation. Inventories of BC emissions suggest significant changes in the global BC aerosol distribution due to human activity. However, little is known regarding BC's atmospheric distribution or aged particle characteristics before the twentieth century. Here we investigate the prevalence and structural properties of BC particles in Antarctic ice cores from 1759, 1838, and 1930 Common Era (C.E.) using transmission electron microscopy and energy-dispersive X-ray spectroscopy. The study revealed an unexpected diversity in particle morphology, insoluble coatings, and association with metals. In addition to conventionally occurring BC aggregates, we observed single BC monomers, complex aggregates with internally, and externally mixed metal and mineral impurities, tar balls, and organonitrogen coatings. The results of the study show BC particles in the remote Antarctic atmosphere exhibit complexity that is unaccounted for in atmospheric models of BC.

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