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Boundary Mixing and Topographic Blocking on the Mid-Atlantic Ridge in the South Atlantic
Publisher: American Meteorological Society
Abstract: It is commonly observed in hydrographic sections crossing midocean ridges that the isopycnals on the ridge flanks slope downward toward the crests. Although the observed vertical scales of isopycnal dipping are not consistent ...
Float-Derived Isopycnal Diffusivities in the DIMES Experiment
Publisher: American Meteorological Society
Abstract: s 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 ...
Flow and Mixing in the Rift Valley of the Mid-Atlantic Ridge
Publisher: American Meteorological Society
Abstract: High levels of diapycnal mixing and geothermal heating near midocean ridges contribute to the buoyancy fluxes that are required to close the global circulation. In topographically confined areas, such as the deep median ...
The Origin of Deep Zonal Flows in the Brazil Basin
Publisher: American Meteorological Society
Abstract: Recent data from a deployment of Lagrangian floats in the Brazil Basin of the South Atlantic reveal a swift western boundary current and predominantly zonal flow in the interior at a depth of about 2500 m. Dynamical ...
Mixing Associated with Sills in a Canyon on the Midocean Ridge Flank
Publisher: American Meteorological Society
Abstract: To close the global overturning circulation, the production and sinking of dense water at high latitudes must be balanced elsewhere by buoyancy gain and upward vertical motion. Hydrographic and microstructure observations ...