Spectral Element Method Part 2: Numerical Simulations
Breaking Rossby waves on the polar night vortex are numerically simulated by solving the 3D spherical primitive equations with the Spectral Element Atmospheric Model described in Part 1. A balanced axisymmetric-vortex is initialized with a step-function-like absolute-vorticity profile. Steadily-incr...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.32.4413 2023-05-15T18:02:14+02:00 Spectral Element Method Part 2: Numerical Simulations Aimé Fournier Mark A. Taylor Lorenzo M. Polvani R. Saravanan The Pennsylvania State University CiteSeerX Archives 2000 application/postscript http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.32.4413 en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.32.4413 Metadata may be used without restrictions as long as the oai identifier remains attached to it. ftp://ftp.cgd.ucar.edu/pub/fournier/publications/NuSi.ps.gz text 2000 ftciteseerx 2016-09-04T00:16:29Z Breaking Rossby waves on the polar night vortex are numerically simulated by solving the 3D spherical primitive equations with the Spectral Element Atmospheric Model described in Part 1. A balanced axisymmetric-vortex is initialized with a step-function-like absolute-vorticity profile. Steadily-increasing, zonal-wavenumber-one surface-geopotential forcing is used to instigate upwardly propagating Rossby waves. Spurious reflection is prevented by a sponge layer near the model top. Isosurfaces of scaled potential vorticity exhibit complex dynamical features, e.g., a primary PV tongue, and a secondary instability causing roll-up into a ring of five smaller sub-vortices. These are shown in Figs. 3 and 4. These features converge, and PV gradients steepen, as resolution is increased. The PV-tongue-tip position, number of sub-vortices, zonal velocity profile and other quantitative measures are presented as specific modeling-accuracy results. SEAM produces solutions up to approximately T181 (approxi. Text polar night Unknown |
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Open Polar |
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Unknown |
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ftciteseerx |
language |
English |
description |
Breaking Rossby waves on the polar night vortex are numerically simulated by solving the 3D spherical primitive equations with the Spectral Element Atmospheric Model described in Part 1. A balanced axisymmetric-vortex is initialized with a step-function-like absolute-vorticity profile. Steadily-increasing, zonal-wavenumber-one surface-geopotential forcing is used to instigate upwardly propagating Rossby waves. Spurious reflection is prevented by a sponge layer near the model top. Isosurfaces of scaled potential vorticity exhibit complex dynamical features, e.g., a primary PV tongue, and a secondary instability causing roll-up into a ring of five smaller sub-vortices. These are shown in Figs. 3 and 4. These features converge, and PV gradients steepen, as resolution is increased. The PV-tongue-tip position, number of sub-vortices, zonal velocity profile and other quantitative measures are presented as specific modeling-accuracy results. SEAM produces solutions up to approximately T181 (approxi. |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
Aimé Fournier Mark A. Taylor Lorenzo M. Polvani R. Saravanan |
spellingShingle |
Aimé Fournier Mark A. Taylor Lorenzo M. Polvani R. Saravanan Spectral Element Method Part 2: Numerical Simulations |
author_facet |
Aimé Fournier Mark A. Taylor Lorenzo M. Polvani R. Saravanan |
author_sort |
Aimé Fournier |
title |
Spectral Element Method Part 2: Numerical Simulations |
title_short |
Spectral Element Method Part 2: Numerical Simulations |
title_full |
Spectral Element Method Part 2: Numerical Simulations |
title_fullStr |
Spectral Element Method Part 2: Numerical Simulations |
title_full_unstemmed |
Spectral Element Method Part 2: Numerical Simulations |
title_sort |
spectral element method part 2: numerical simulations |
publishDate |
2000 |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.32.4413 |
genre |
polar night |
genre_facet |
polar night |
op_source |
ftp://ftp.cgd.ucar.edu/pub/fournier/publications/NuSi.ps.gz |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.32.4413 |
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Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
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1766172031473156096 |