Anisotropic material transport by eddies and eddy-driven currents in a model of the North Atlantic
Kamenkovich, Igor V.
Berloff, Pavel S.
MetadataShow full item record
This study analyzes anisotropic properties of the material transport by eddies and eddy-driven zonal jets in a general circulation model of the North Atlantic through the analysis of Lagrangian particle trajectories. Spreading rates—defined here as half the rate of change in the particle dispersion—in the zonal direction systematically exceed the meridional rates by an order of magnitude. Area-averaged values for the upper-ocean zonal and meridional spreading rates are approximately 8100 and 1400 m2 s−1, respectively, and in the deep ocean they are 2400 and 200 m2 s−1. The results demonstrate that this anisotropy is mainly due to the action of the transient eddies and not to the shear dispersion associated with the time-mean jets. This property is consistent with the fact that eddies in this study have zonally elongated shapes. With the exception of the upper-ocean subpolar gyre, eddies also cause the superdiffusive zonal spreading, significant variations in the spreading rate in the vertical and meridional directions, and the difference between the westward and eastward spreading.
Author Posting. © American Meteorological Society, 2009. This article is posted here by permission of American Meteorological Society for personal use, not for redistribution. The definitive version was published in Journal of Physical Oceanography 39 (2009): 3162-3175, doi:10.1175/2009JPO4239.1.
Suggested CitationArticle: Kamenkovich, Igor V., Berloff, Pavel S., Pedlosky, Joseph, "Anisotropic material transport by eddies and eddy-driven currents in a model of the North Atlantic", Journal of Physical Oceanography 39 (2009): 3162-3175, DOI:10.1175/2009JPO4239.1, https://hdl.handle.net/1912/3991
Showing items related by title, author, creator and subject.
Near-surface transport pathways in the north Atlantic Ocean : looking for throughput from the subtropical to the subpolar gyre Rypina, Irina I.; Pratt, Lawrence J.; Lozier, M. Susan (American Meteorological Society, 2011-05)Motivated by discrepancies between Eulerian transport estimates and the behavior of Lagrangian surface drifters, near-surface transport pathways and processes in the North Atlantic are studied using a combination of data, ...
Fratantoni, Paula S.; Pickart, Robert S. (American Meteorological Society, 2007-10)Twelve years of historical hydrographic data, spanning the period 1990–2001, are analyzed to examine the along-stream evolution of the western North Atlantic Ocean shelfbreak front and current, following its path between ...
Freshwater export from the Labrador Current to the North Atlantic Current at the Tail of the Grand Banks of Newfoundland Fratantoni, Paula S.; McCartney, Michael S. (2009-11)Historical hydrographic data, spanning the period 1896-2006, are used to examine the annual mean and seasonal variations in the distribution of freshwater along and across the shelf/slope boundary along the Labrador and ...