• 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.

    Warm northern tropical Indian Ocean strengthened the ocean circulation prior to the last glacial termination

    Thumbnail
    View/Open
    Glob_Planet_Chan_209_103733a.pdf (1.594Mb)
    Date
    2022
    Author
    Singh, D.P.
    Saraswat, R.
    Mohtadi, M.
    Kumar, P.
    Metadata
    Show full item record
    Abstract
    Modern observations and model simulations suggest a strong influence of tropical processes on high-latitudinal climate. The evidence of similar tropics-high latitude climate link during glacial termination is, however, elusive. Here we show a strong influence of tropical processes in terminating the last glacial period based on multi-decadal seawater temperature, upwelling intensity and runoff records from the tropical Indian Ocean. We report a well-defined warming (1.4 °C) starting at ~20 kyr BP, coeval with abrupt increase in upwelling intensity and local CO2 outgassing, long before the beginning of increase in global atmospheric CO2 at 18.2 kyr BP. We suggest that the tropical Indian Ocean warming prior to the increase in global atmospheric CO2 was modulated by intense regional hydrographic changes caused by local summer insolation. The warming prior to Termination I (~18-11 kyr BP), at our site was synchronous with a small but evident strengthening of the Atlantic Meridional Overturning Circulation (AMOC). We conclude that the early warming in the tropical northern Indian Ocean led to stronger AMOC and the subsequent melting of the northern high latitude sea ice, which ultimately triggered the Heinrich Stadial during the last glacial termination
    URI
    https://doi.org/10.1016/J.GLOPLACHA.2021.103733
    https://drs.nio.org/drs/handle/2264/8814
    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