• 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.

    Biophysical processes in the Indian Ocean

    Thumbnail
    View/Open
    Geophys_Monogr_Ser_185_9.pdf (8.484Mb)
    Date
    2009
    Author
    McCreary, J.P.
    Murtugudde, R.
    Vialard, J.
    Vinayachandran, P.N.
    Wiggert, J.D.
    Hood, R.R.
    Shankar, D.
    Shetye, S.R.
    Metadata
    Show full item record
    Abstract
    Basic physical processes that impact biological activity in the Indian Ocean (IO), namely, near-surface processes (upwelling, entrainment, detrainment, and advection) and subsurface circulations (shallow overturning cells and subthermocline currents), are reviewed. In the Arabian Sea, there are upwelling blooms during the southwest monsoon (SWM) along Somalia, Oman, and the west coast of India. In the central Arabian Sea, the overall SWM (northeast monsoon; NEM) blooms appear to be a series of entrainment (detrainment) blooms forced by intraseasonal winds. In the western Bay of Bengal, a prominent NEM bloom results from the entrainment of a preexisting deep chlorophyll maximum (DCM). South of Sri Lanka, the SWM bloom is caused by coastal upwelling and Ekman suction, and is swept into the Bay of Bengal by the Southwest Monsoon Current. In the tropical, South IO (5-20 degrees S), there is a weak, surface bloom during boreal summer when new production is enhanced by nutrient entrainment; the surface bloom is even weaker (or absent) during boreal winter because the mixed layer is thinner, the thermocline is deeper, and hence, nutrient entrainment weaker. At intraseasonal timescales, blooms are associated with wind events and Rossby waves/eddies, and they can be generated by both new production and entrainment of a preexisting DCM. During the 1997/1998 El Nino Southern Oscillation/IO zonal dipole event, there was an upwelling bloom near Sumatra/Java in fall 1997, a much deeper DCM and weaker surface bloom along 5-10 degrees S in spring 1998, and a weaker bloom in the Arabian Sea during the SWM of 1998.
    URI
    http://drs.nio.org/drs/handle/2264/3515
    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