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    Mantle 3He distribution and deep circulation in the Indian Ocean

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    2003JC002028.pdf (2.463Mb)
    Date
    2004-06-10
    Author
    Srinivasan, Ashwanth  Concept link
    Top, Zafer  Concept link
    Schlosser, Peter  Concept link
    Hohmann, Roland  Concept link
    Iskandarani, Mohamed  Concept link
    Olson, Donald B.  Concept link
    Lupton, John E.  Concept link
    Jenkins, William J.  Concept link
    Metadata
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    Citable URI
    https://hdl.handle.net/1912/3711
    As published
    https://doi.org/10.1029/2003JC002028
    DOI
    10.1029/2003JC002028
    Keyword
     Indian Ocean; Tracers; Deep circulation 
    Abstract
    The World Ocean Circulation Experiment Indian Ocean helium isotope data are mapped and features of intermediate and deep circulation are inferred and discussed. The 3He added to the deep Indian Ocean originates from (1) a strong source on the mid-ocean ridge at about 19°S/65°E, (2) a source located in the Gulf of Aden in the northwestern Indian Ocean, (3) sources located in the convergent margins in the northeastern Indian Ocean, and (4) water imported from the Indonesian Seas. The main circulation features inferred from the 3He distribution include (1) deep (2000–3000 m) eastward flow in the central Indian Ocean, which overflows into the West Australian Basin through saddles in the Ninetyeast Ridge, (2) a deep (2000–3000 m) southwestward flow in the western Indian Ocean, and (3) influx of Banda Sea Intermediate Waters associated with the deep core (1000–1500 m) of the through flow from the Pacific Ocean. The large-scale 3He distribution is consonant with the known pathways of deep and bottom water circulation in the Indian Ocean.
    Description
    Author Posting. © American Geophysical Union, 2004. This article is posted here by permission of American Geophysical Union for personal use, not for redistribution. The definitive version was published in Journal of Geophysical Research 109 (2004): C06012, doi:10.1029/2003JC002028.
    Collections
    • Marine Chemistry and Geochemistry (MC&G)
    Suggested Citation
    Journal of Geophysical Research 109 (2004): C06012
     

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