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Browsing MIT Open Access Articles by Author "Marshall, John C."

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Browsing MIT Open Access Articles by Author "Marshall, John C."

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  • Ferreira, David; Bitz, Cecilia M.; Solomon, Susan; Marshall, John C.; Plumb, R. Alan (American Meteorological Society, 2015-02)
    The response of the Southern Ocean to a repeating seasonal cycle of ozone loss is studied in two coupled climate models and is found to comprise both fast and slow processes. The fast response is similar to the interannual ...
  • Ferreira, David; Marshall, John C.; Rose, Brian Edward James (American Meteorological Society, 2010-10)
    Multiple equilibria in a coupled ocean–atmosphere–sea ice general circulation model (GCM) of an aquaplanet with many degrees of freedom are studied. Three different stable states are found for exactly the same set of ...
  • Thomas, L.; Talley, L.; Silverthorne, K.; Skyllingstad, E.; Samelson, R.; Lumpkin, R.; Palter, J.; Lozier, S.; Kelly, K.; Gregg, M.; Edson, J.; Weller, R.; Toole, J.; Straneo, F.; Joyce, T.; Fratantoni, D.; Doney, Scott C.; Dewar, W.; Bates, N.; Andersson, A.; Maze, Guillaume O.; Forget, Gael; Ferrari, Raffaele; Marshall, John C. (American Meteorological Society, 2009-01)
    A major oceanographic field experiment is described, which is designed to observe, quantify, and understand the creation and dispersal of weakly stratified fluid known as “mode water” in the region of the Gulf Stream. ...
  • Abernathey, Ryan Patrick; Marshall, John C.; Ferreira, David (American Meteorological Society, 2011-12)
    An eddy-resolving numerical model of a zonal flow, meant to resemble the Antarctic Circumpolar Current, is described and analyzed using the framework of J. Marshall and T. Radko. In addition to wind and buoyancy forcing ...
  • Marshall, John C.; Maze, Guillaume O. (American Meteorological Society, 2011-10)
    Analyzed fields of ocean circulation and the flux form of the potential vorticity equation are used to map the creation and subsequent circulation of low potential vorticity waters known as subtropical mode water (STMW) ...
  • Tulloch, Ross; Ferrari, Raffaele; Jahn, Oliver; Klocker, Andreas; LaCasce, Joseph H.; Ledwell, James R.; Messias, Marie-Jose; Speer, Kevin; Watson, Andrew; Marshall, John C. (American Meteorological Society, 2014-12)
    The first direct estimate of the rate at which geostrophic turbulence mixes tracers across the Antarctic Circumpolar Current is presented. The estimate is computed from the spreading of a tracer released upstream of Drake ...
  • Marshall, John C.; Abernathey, Ryan Patrick; Mazloff, Matthew R.; Shuckburgh, Emily (American Meteorological Society, 2010-01)
    Meridional cross sections of effective diffusivity in the Southern Ocean are presented and discussed. The effective diffusivity, K[subscript eff], characterizes the rate at which mesoscale eddies stir properties on interior ...
  • Forget, Gael; Maze, Guillaume O.; Buckley, Martha Weaver; Marshall, John C. (American Meteorological Society, 2010-07)
    The seasonal cycle in the volume and formation rate of Eighteen Degree Water (EDW) in the North Atlantic is quantified over the 3-yr period from 2004 to 2006. The EDW layer is defined as all waters that have a temperature ...
  • Marshall, John C.; Smith, K. Shafer (American Meteorological Society, 2008-06)
    Satellite altimetric observations of the ocean reveal surface pressure patterns in the core of the Antarctic Circumpolar Current (ACC) that propagate downstream (eastward) but slower than the mean surface current by about ...
  • Marshall, John C.; Enderton, Daniel (American Meteorological Society, 2008-07)
    The degree to which total meridional heat transport is sensitive to the details of its atmospheric and oceanic components is explored. A coupled atmosphere, ocean, and sea ice model of an aquaplanet is employed to simulate ...
  • Tulloch, Ross; Marshall, John C. (American Meteorological Society, 2012-06)
    Multidecadal variability in the Atlantic meridional overturning circulation (AMOC) of the ocean is diagnosed in the NCAR Community Climate System Model, version 3 (CCSM3), and the GFDL Coupled Model (CM2.1). Common diagnostic ...
  • LaCasce, Joseph H.; Balwada, D.; Speer, K.; Ferrari, Raffaele; Marshall, John C.; Tulloch, Ross (American Meteorological Society, 2014-02)
    As part of the Diapycnal and Isopycnal Mixing Experiment in the Southern Ocean (DIMES), 210 subsurface floats were deployed west of the Drake Passage on two targeted density surfaces. Absolute (single particle) diffusivities ...
  • Zhang, Rong; Delworth, Thomas L.; Sutton, Rowan; Hodson, Daniel L. R.; Dixon, Keith W.; Held, Isaac M.; Kushnir, Yochanan; Ming, Yi; Msadek, Rym; Robson, Jon; Rosati, Anthony J.; Ting, MingFang; Vecchi, Gabriel A.; Marshall, John C. (American Meteorological Society, 2013-04)
    Identifying the prime drivers of the twentieth-century multidecadal variability in the Atlantic Ocean is crucial for predicting how the Atlantic will evolve in the coming decades and the resulting broad impacts on weather ...
  • Armour, Kyle C.; Kostov, Yavor Krasimirov; Marshall, John C. (American Geophysical Union (AGU), 2014-03)
    We propose here that the Atlantic meridional overturning circulation (AMOC) plays an important role in setting the effective heat capacity of the World Ocean and thus impacts the pace of transient climate change. The depth ...
  • Donohoe, Aaron; Marshall, John C.; Ferreira, David; Armour, Kyle; McGee, David (American Meteorological Society, 2014-05)
    The interannual variability of the location of the intertropical convergence zone (ITCZ) is strongly (R = 0.75) correlated with the atmospheric heat transport across the equator (AHTEQ) over the satellite era (1979–2009). ...
  • Tulloch, Ross; Marshall, John C.; Smith, K. Shafer (American Geophysical Union, 2008-07)
    The interpretation of surface altimetric signals in terms of Rossby waves is revisited. Rather than make the long-wave approximation, the horizontal scale of the waves is adjusted to optimally fit the phase speed predicted ...
  • Marshall, John C.; Campin, Jean-Michel; Ferreira, David (American Meteorological Society, 2010-03)
    A series of coupled atmosphere–ocean–ice aquaplanet experiments is described in which topological constraints on ocean circulation are introduced to study the role of ocean circulation on the mean climate of the coupled ...
  • Shuckburgh, Emily; Maze, Guillaume O.; Ferreira, David; Marshall, John C.; Jones, Helen; Hill, Christopher N. (American Meteorological Society, 2011-01)
    The modulation of air–sea heat fluxes by geostrophic eddies due to the stirring of temperature at the sea surface is discussed and quantified. It is argued that the damping of eddy temperature variance by such air–sea ...
  • Nilsson, Johan; Langen, Peter L.; Ferreira, David; Marshall, John C. (American Meteorological Society, 2013-08)
    A coupled atmosphere–sea ice–ocean model is used in an aqua-planet setting to examine the role of the basin geometry for the climate and ocean circulation. The basin geometry has a present-day-like topology with two idealized ...
  • Rose, Brian Edward James; Marshall, John C. (American Meteorological Society, 2009-03)
    Several extensions of energy balance models (EBMs) are explored in which (i) sea ice acts to insulate the atmosphere from the ocean and (ii) ocean heat transport is allowed to have some meridional structure controlled ...
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