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Next: 6.3.8 Package Reference Up: 6.3 Gent/McWiliams/Redi SGS Eddy Previous: 6.3.6 Tapering: Danabasoglu and   Contents

6.3.7 Tapering: Large, Danabasoglu and Doney, JPO 1997

The tapering used in Large et al., 1997, [35], is based on the DM95 tapering scheme, but also tapers the scheme with an additional function of height, $ f_2(z)$, so that the GM/Redi SGS fluxes are reduced near the surface:

$\displaystyle f_2(S) = \frac{1}{2} \left( 1 + \sin(\pi \frac{z}{D} - \pi/2)\right)$ (6.22)

where $ D = L_\rho \vert S\vert$ is a depth-scale and $ L_\rho=c/f$ with $ c=2$ m s$ ^{-1}$. This tapering with height was introduced to fix some spurious interaction with the mixed-layer KPP parameterization.

The LDD tapering scheme is activated in the model by setting GM_taper_scheme = 'ldd97' in data.gmredi.

Figure 6.3: Mixed layer depth using GM parameterization with a) Cox slope clipping and for comparison b) using horizontal constant diffusion.
\begin{figure}\begin{center} Figure missing. \end{center} \end{figure}


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