Search Results

You are looking at 1 - 6 of 6 items for :

  • Southern Ocean x
  • In Honor of Joseph Pedlosky x
  • All content x
Clear All
K. Shafer Smith and John Marshall

, for enhanced particle exchange at the steering level. Satellite altimetric observations of the Southern Ocean do suggest the presence of large-scale waves that propagate downstream in the Antarctic Circumpolar Current (ACC) at a rate significantly slower (25%) than that of surface currents. This was anticipated by Hughes (1996) in studies of an eddy-resolving model of the Southern Ocean where it was argued that the eastward flow of the ACC turned it into a Rossby waveguide. The top panel of Fig

Full access
Carl Wunsch and Patrick Heimbach

variability—a form of description that has been widely invoked to discuss present, past, and future climate states. Recalculation of the results in, for example, neutral density space in the Southern Ocean, and in stream-coordinates as the residual mean, would be illuminating, but again these are not displayed here. In our present usage, MOC refers to the top-to-bottom circulation; some other authors employ the term for the very-near-surface, highly volatile flow, which for purposes of this paper is

Full access
Michael A. Spall

1. Introduction The heat and freshwater carried by the oceanic thermohaline circulation comprises a fundamental component of the earth’s climate system. The prototypical example is the North Atlantic Ocean. Warm, salty water is carried northward in the upper ocean where, at high latitudes, the water becomes both colder and fresher, resulting in dense water masses that return to low latitudes in the middepth and deep ocean. Much attention has been paid to where and how deep waters return to the

Full access
R. M. Samelson

1. Introduction The middepth cell of the ocean’s zonally integrated meridional overturning circulation, consisting loosely of the southward flow of North Atlantic deep water from northern subpolar latitudes to the Southern Hemisphere and the compensating northward flow of warm thermocline waters from the Southern Hemisphere to the northern subpolar gyre, is a central element of the large-scale ocean circulation, which likely plays a major role in the earth’s climate system ( Schmitz 1996a , b

Full access
Onno Bokhove and Vijaya Ambati

these cases, the hybrid Rossby-shelf mode is a combination of an azimuthal mode number m = 0–Rossby mode in the deep ocean absorbing into an m = 2–shelf mode at the western shelf, which after traversing counterclockwise along the southern shelf edge at R s = 0.8 R radiates again into the deep-ocean “planetary” Rossby mode. Such behavior is suggested directly from the dispersion relations (A6) and (A15) of the invisicid or free planetary Rossby wave and shelf modes, plotted separately in

Full access
Paola Cessi and Christopher L. Wolfe

1. Introduction One measure of the strength of the meridional transport in the ocean is the meridional overturning circulation (MOC), defined here as the time-averaged and zonally integrated meridional mass transport of the ocean. Monitoring the MOC is observationally challenging; there have been efforts to estimate its transport using a carefully designed set of sustained observations [e.g., the rapid climate change programme (RAPID)]. Using geostrophy of the meridional velocity and mass

Full access