On the mix-down times of dynamically active potential vorticity filaments
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Plumb_On the mix-down.pdf
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Author(s)
Polvani, Lorenzo M.
Esler Jr, Kenneth P
Plumb, R. Alan
Date Issued
October 1999
Journal
Geophysical Research Letters
Publisher
American Geophysical Union (AGU)
Citation
Esler, J. Gavin, Lorenzo M. Polvani, and R. Alan Plumb. “On the Mix-down Times of Dynamically Active Potential Vorticity Filaments.” Geophysical Research Letters 26, no. 19 (October 1, 1999): 2953–2956.
Version
Final published version
Abstract
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.
MIT Department
Massachusetts Institute of Technology. Department of Earth, Atmospheric, and Planetary Sciences
Massachusetts Institute of Technology. Program in Atmospheres, Oceans, and Climate
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Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
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DOI of Published Version
https://doi.org/10.1029/1999GL010875
