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Next: 6.3.7 Tapering: Large, Danabasoglu Up: 6.3 Gent/McWiliams/Redi SGS Eddy Previous: 6.3.5 Tapering and stability   Contents

6.3.6 Tapering: Danabasoglu and McWilliams, J. Clim. 1995

The tapering scheme used by Danabasoglu and McWilliams, 1995, [11], followed a similar procedure but used a different tapering function, $ f_1(S)$:

$\displaystyle f_1(S) = \frac{1}{2} \left( 1+\tanh \left[ \frac{S_c - \vert S\vert}{S_d} \right] \right)$ (6.21)

where $ S_c = 0.004$ is a cut-off slope and $ S_d=0.001$ is a scale over which the slopes are smoothly tapered. Functionally, the operates in the same way as the GKW91 scheme but has a substantially lower cut-off, turning off the GM/Redi SGS parameterization for weaker slopes.

The DM tapering scheme is activated in the model by setting GM_taper_scheme = 'dm95' in data.gmredi.



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