• Login
    View Item 
    •   DSpace Home
    • Institute's contributions
    • Scholarly literature
    • View Item
    •   DSpace Home
    • Institute's contributions
    • Scholarly literature
    • View Item
    JavaScript is disabled for your browser. Some features of this site may not work without it.

    Nitrate records of a shallow ice core from East Antarctica: Atmospheric processes, preservation and climatic implications

    Thumbnail
    View/Open
    Holocene_21_351.pdf (1.691Mb)
    Date
    2011
    Author
    Laluraj, C.M.
    Thamban, M.
    Naik, S.S.
    Redkar, B.L.
    Chaturvedi, A.
    Ravindra, R.
    Metadata
    Show full item record
    Abstract
    High-resolution records of nitrate (NO sub(3) sup(-)), oxygen isotope (delta sup(18) O) and non-sea salt sulphate (nssSO sub(4) sup(2-)) were studied using an ice core collected from central Dronning Maud Land in East Antarctica to identify the influence of environmental variability on accumulation of NO sub(3) sup(-) over the past 450 years. The results confirmed that multiple processes were responsible for the production and preservation of NO sub(3) sup(-) in Antarctic ice. Correlation between NO sub(3) sup(-) and nssSO sub(4) sup(2-) peaks revealed that sulphate aerosols released during major volcanic eruptions might have activated the production of nitric acid, which was scavenged by ion-induced nucleation in polar ice sheets. The correlation between the nitrate and delta sup(18) O records further suggest that enhanced NO sub(3) sup(-) preservation in the ice occurred during periods of lower atmospheric temperature. Major shifts in the NO sub(3) sup(-) record of the ice core presently studied and its comparison with 10Be record from a core collected from South Pole suggest that a reduction in solar activity influenced the NO sub(3) sup(-) accumulation in Antarctica through enhanced production of odd nitrogen species
    URI
    http://drs.nio.org/drs/handle/2264/3806
    Collections
    • Scholarly literature [9074]

    DSpace software copyright © 2002-2016  DuraSpace
    Contact Us | Send Feedback
    Theme by 
    Atmire NV
     

     

    Browse

    All of DSpaceCommunities & CollectionsBy Issue DateAuthorsTitlesSubjectsThis CollectionBy Issue DateAuthorsTitlesSubjects

    My Account

    LoginRegister

    DSpace software copyright © 2002-2016  DuraSpace
    Contact Us | Send Feedback
    Theme by 
    Atmire NV