Now showing items 1-9 of 9

    • Enhancement in vertical fluxes at a front by mesoscale-submesoscale coupling 

      Ramachandran, Sanjiv; Tandon, Amit; Mahadevan, Amala (John Wiley & Sons, 2014-12-12)
      Oceanic frontal instabilities are of importance for the vertical exchange of properties in the ocean. Submesoscale, O(1) Rossby number, dynamics are particularly relevant for inducing the vertical (and lateral) flux of ...
    • Flow-induced channelization in a porous medium 

      Mahadevan, Amala; Orpe, A. V.; Kudrolli, A.; Mahadevan, L. (2012-05-17)
      Flow through a saturated, granular, porous medium can lead to internal erosion, preferential flow enhancement and the formation of channels within the bulk of the medium. We examine this phenomenon using a combination ...
    • Large-scale alignment of oceanic nitrate and density 

      Omand, Melissa M.; Mahadevan, Amala (John Wiley & Sons, 2013-10-15)
      By analyzing global data, we find that over large scales, surfaces of constant nitrate are often better aligned with isopycnals than with isobars, particularly below the euphotic zone. This is unexplained by the movement ...
    • The LatMix summer campaign : submesoscale stirring in the upper ocean 

      Shcherbina, Andrey Y.; Sundermeyer, Miles A.; Kunze, Eric; D’Asaro, Eric; Badin, Gualtiero; Birch, Daniel; Brunner-Suzuki, Anne-Marie E. G.; Callies, Joern; Cervantes, Brandy T. Kuebel; Claret, Mariona; Concannon, Brian; Early, Jeffrey; Ferrari, Raffaele; Goodman, Louis; Harcourt, Ramsey R.; Klymak, Jody M.; Lee, Craig M.; Lelong, M.-Pascale; Levine, Murray D.; Lien, Ren-Chieh; Mahadevan, Amala; McWilliams, James C.; Molemaker, M. Jeroen; Mukherjee, Sonaljit; Nash, Jonathan D.; Ozgokmen, Tamay M.; Pierce, Stephen D.; Ramachandran, Sanjiv; Samelson, Roger M.; Sanford, Thomas B.; Shearman, R. Kipp; Skyllingstad, Eric D.; Smith, K. Shafer; Tandon, Amit; Taylor, John R.; Terray, Eugene A.; Thomas, Leif N.; Ledwell, James R. (American Meteorological Society, 2015-08)
      Lateral stirring is a basic oceanographic phenomenon affecting the distribution of physical, chemical, and biological fields. Eddy stirring at scales on the order of 100 km (the mesoscale) is fairly well understood and ...
    • Linear stability analysis for monami in a submerged seagrass bed 

      Singh, Ravi; Bandi, M. M.; Mahadevan, Amala; Mandre, Shreyas (Cambridge University Press, 2015-11-24)
      The onset of monami – the synchronous waving of seagrass beds driven by a steady flow – is modelled as a linear instability of the flow. Unlike previous works, our model considers the drag exerted by the grass in establishing ...
    • Mechanism for export of sediment-derived iron in an upwelling regime 

      Siedlecki, Samantha A.; Mahadevan, Amala; Archer, D. E. (American Geophysical Union, 2012-02-11)
      Model simulations performed with a three-dimensional, high-resolution, process study ocean model of eastern boundary upwelling systems are used to describe a mechanism that efficiently transports sediment-derived dissolved ...
    • Reconstructing the ocean's interior from surface data 

      Wang, Jinbo; Flierl, Glenn R.; LaCasce, Joseph H.; McClean, Julie L.; Mahadevan, Amala (American Meteorological Society, 2013-08)
      A new method is proposed for extrapolating subsurface velocity and density fields from sea surface density and sea surface height (SSH). In this, the surface density is linked to the subsurface fields via the surface ...
    • The shape of the oceanic nitracline 

      Omand, Melissa M.; Mahadevan, Amala (Copernicus Publications on behalf of the European Geosciences Union, 2015-06-03)
      In most regions of the ocean, nitrate is depleted near the surface by phytoplankton consumption and increases with depth, exhibiting a strong vertical gradient in the pycnocline (here referred to as the nitracline). The ...
    • Spontaneous generation of near-inertial waves by the Kuroshio Front 

      Nagai, Takeyoshi; Tandon, Amit; Kunze, Eric; Mahadevan, Amala (American Meteorological Society, 2015-09)
      While near-inertial waves are known to be generated by atmospheric storms, recent observations in the Kuroshio Front find intense near-inertial internal-wave shear along sloping isopycnals, even during calm weather. Recent ...