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This editor belongs to a type of editors known as family editors which allows related sets of input specifications to be grouped in the same icon editor. The main computation type can be set via the Application parameter which offers these options:
To operate with this icon first you need to select which type of output you want to create (parameter Application) then the available parameters will change in the editor according to your selection.
Specifies the data required for the application: it requires divergence for velocity potential and vorticity for stream function (both in spherical harmonics representation).
Specifies the truncation to be applied to the spherical harmonics input data prior to transformation to gridpoint space.
Specifies whether to apply spatial smoothing to the spherical harmonics prior to transformation to grid points. This operation is performed after the truncation specified in Truncation . The smoothing filter is of the form :
\exp\left(-(\frac{n\times (n+1)}{fltc\times (fltc+1)})^{mfltexp}\right) |
where,
n
: is the wavenumberfltc, mfltexp
: see belowThis filter is roughly equivalent to applying the
\nabla^{2\times mfltexp} |
operator in grid point space.
Specifies the value of the parameter fltc to be used in the smoothing filter. Only available if Smoothing is set to Yes. The default value is 19.4
Specifies the value of the parameter mfltexp to be used in the smoothing filter. Only available if Smoothing is set to Yes. The default value is 2, roughly equivalent to applying the
\nabla^{4} |
operator in gridpoint space.