Esler, JG; Polvani, LM; Plumb, RA; (1999) On the mix-down times of dynamically active potential vorticity filaments. Geophysical Research Letters , 26 (19) 2953 - 2956. 10.1029/1999GL010875.
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A simple model is used to study the evolution of potential vorticity filaments, viewed in cross-section, subject to steady shear and deformation flows representative of the large-scale atmospheric circulation. It is found that the balanced, ageostrophic circulation induced by the anomalous potential vorticity can cause the evolution of a dynamically active filament to differ substantially from that of a dynamically passive filament in a similar background flow. It is suggested that estimates of the mix-down time of material contained in atmospheric filaments need to be corrected to allow for this effect.
|Title:||On the mix-down times of dynamically active potential vorticity filaments|
|Open access status:||An open access version is available from UCL Discovery|
|Additional information:||Copyright 1999 by the American Geophysical Union|
|UCL classification:||UCL > School of BEAMS > Faculty of Maths and Physical Sciences > Mathematics|
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