| SCM |
Turbulence |
Massflux |
Cloud Scheme |
ECMWF
|
K-profile, mixing theta, qv, u, v, dry
formulation stability, implicit entrainment (parcels) |
Tiedke bulk massflux, entrainment and detrainment coeff
equal/prescriped.
Cl. base MF: convergence moist static energy |
prognostic cloud scheme (cloud fraction (c.f.),
liq water) ,
c.f. dependent on detrainment, BL turbulence, and stratiform
condensation. |
LMD
|
Louis-type, mixing theta, qv (??), u, v. moist
formulation stability Ri/linear in c.f., no top entrainment |
Emanuel multiple mass flux, entr/detr dynamical dep.
on CAPE/ buoyancy sorting,
Cl. base MF: buoyancy parcel LFC (- 40 hPa) + CAPE. |
Statist. cloudscheme dep. on qt, progn.
equation ql/qi, Sundqvist precipitation/evaporation. |
ARPEGE
|
1.5 order TKE scheme (previously Louis-type, more recently
2nd order Mellor-Yamada). Mixing in: qv, dry static energy (Cp*T+g*z),
u and v.Moist formulation for stability, depending on Q1 (norm. sat. deficit,
Bougeault 82).
No top PBL entrainment (next Grenier) |
Bougeault bulk mass flux, prescribed entrainment/detrainment
function of height.
Cl. base MF: convergence moist static energy |
Statist. cloudscheme stratiform + deep convective cloud
amount. No progn equation ql/qi |
RACMO/
ECHAM
|
TKE-l, mixing qv, ql, dry static energy, u, v.
Moist
stability linear in c.f., l based on N^2, implicit
entrainment |
Tiedke bulk massflux, entrainment and detrainment coeff
not equal and prescriped.
Cl. base MF: wstar closure. |
Cloud fraction (statist.) dependent on qt. Variance qt
dep.
on mass flux, prognost. equa. ql/qi, large scale condensation/evap Sundqvist |
ECHAM
|
TKE-l, mixing qv, ql, dry static energy, u, v.
Moist
stability linear in c.f., l based on Ri, implicit entrainment |
Tiedke bulk massflux, entrainment and detrainment coeff
equal/prescriped.
Cl. base MF: moisture convergence |
Cloud fraction dependent on relative humidity.
prognost. equa. ql/qi,
large scale condensation/evap Sundqvist |
| HIRLAM |
TKE-l |
Bulk Mass flux |
?? |
| Meso-NH |
1.5 order TKE-l scheme. Lengthscale parcel method (B&L).
Mixing in
theta, qv (??), u, v. Moist formulation
stability. Stability function defined by Redelsperger and Sommeria (1981). |
Bougeault bulk mass flux, entrainment and detrainment
according Kain & Fritsch (1990).
Closure: prescribed dependent on deep or shalloe convection |
Statistical cloud scheme for cloud fraction. Prognostic
equations for cloud liquid water / ice. |