Lagrangian statistics in unforced barotropic flows

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ID: 302076
1999
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Abstract
We consider the dispersion of particles in potential vorticity (PV)-conserving e ows. Because particle drift is preferentially along the mean PV contours, Lagrangian dispersion is strongly anisotropic. If the mean PV e eld moreover is spatially variable, as when there is topography, the anisotropy is more clearly visible in the dispersion of displacements along and across the mean PV e eld itself. We examine several numerical examples of unforced barotropic e ows; in all cases, this ‘ ‘ projected’ ’ dispersion is more anisotropic than that in cartesian ( x, y) coordinates.What differs is the rate at which spreading occurs, both along and across contours. The method is applicable to real data, as is illustrated with e oat data from the deep North Atlantic. The results suggest a preferential spreading along contours of (barotropic) f/H.
Reference Key
openalex_W2164076014 Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors J. H. LaCasce, K. G. Speer
Journal journal of marine research
Year 1999
DOI
10.1357/002224099321618218
URL
https://doi.org/10.1357/002224099321618218
Keywords Keywords not found

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