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On Galerkin approximations for the QG equations
# Supplementary materials
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# Cesar B. Rocha*
# , William R. Young, and Ian Grooms
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# Winter 2015
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# *Scripps Institution of Oceanography, University of California, San Diego, 9500 Gilman Dr. MC 0213, La Jolla, CA/USA,
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# ###The Eady problem
# Base-state and linear stability analysis
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# The Eady base-state approximate PV
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# Approximation A spurius unstable modes: wave structure in the $(x,z)$-plane
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# Output data (click on "view raw" to download)
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# Approximation A
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# Approximation C
# ### The $\beta-$Eady problem
# The $\beta$-Eady linear stability analysis
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# Finite differences solution: Charney mode wave structure in the $(x,z)$-plane
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# Output data (click on "view raw" to download)
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# Approximation A
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# Approximation B
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# Approximation C
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# Finite differences
# ### Extras
# Can we get a sine out of cosines? An elementary example of Galerkin approximation
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# Algebra details
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