Mixing
code | vertical | Lateral | convection |
|---|---|---|---|
AWI | none (see advection) | none (see advection) | complete |
GSFC |
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DRAKKAR | TKE background 1.e-5 m2/s | Isopycnal laplacian 130 m2/s in the Arctic | High diff., 10 m2/s |
ICMMG | Bryan & Lewis, 1979 | laplacian, 1000 to 500 m2/s | based on Richardson no. |
LANL | KPP, no double diffusion | isopycnal-GM, K=2400 m2/s | high diff., 0.1 m2/s |
LU |
| laplacian, 5e4 | complete |
NERSC | stability dependent + gravity entrainment | laplacian, prop to grid space | inflating first layer if denser |
NPS | Pacanowski & Philander | biharmonic, 4.e18 cm4/s | Semtner, 1974 |
NYU | McDougal & Dewar, 1998 | laplacian, propto grid space | Holland and Jenkins, 2001 |
POL | KPP + Gargett & Holloway 1984 | isopycnal-GM | complete |
FEMAO | Constant 1.0 cm2/s, or Monin-Obukhov > 0.01 cm2/s, or 1.5L turbulence scheme + upwind-streamline | upwind-streamline +GM | high diff., 0.1 m2/s |
INMOM | Kochergin, Monin, Obukhov, 0.05 cm2/s | laplacian at z=const | high diff., 0.1 m2/s |
RCO | k-epsilon (Meier, 2001) | laplacian 5.e2 m2/s | k-epsilon (Meier, 2001) |
UCL | 1.5L turbulence scheme | isopycnal-GM, K=2000 m2/s | enhanced diffusion |
UW | constant, 0.05 cm2/s | laplacian, 0.4e6 cm2/s | ? |
DAL |
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FSU |
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GFDL |
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IARC-A | 0.1 ~ 3.0 cm2/s | isopycnal-GM, 1.e2 m2/s | complete |
IARC-B | 0.1 ~ 3.0 cm2/s | laplacian, 1.0 m2/s | complete |
ECCO2 | KPP, no double diffusion | none (see advection) | high diff. + nonlocal transport, 0.1m2/s |
MIT |
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NCAR |
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NPI |
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UMASD |
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NOCS/ORCA25 | TKE | laplacian on isopycnals | TKE |
MCGU |
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LOCEAN | Gaspar et al., 1990 | isoneutral, laplacian, K=500 m2/s | enhanced diffusion |
IOS | internal wave & double diffusion (Merryfield et al, 1999) | laplacian, to 500 m2/s | complete |
GSFC sigma models: diffusivity tensor rotation
NYU: Layer thickness diffusion is used. Diffusivity is 0.01 m/s times horizontal grid spacing.
Convection based on available potential energy ()