## Summary table: Approximations

Boussinesq | anelastic | hydrostatic | flat earth | remarks | |
---|---|---|---|---|---|

ADREA | |||||

ALADIN/A | |||||

ALADIN/PL | |||||

ARPS | ARPS is non-hydrostatic and compressible | ||||

BOLCHEM | |||||

CALMET/CALPUFF | CALMET is a diagnostic 3-dimensional meteorological model; it iterpolate meteorological data (surface and radiosoundins)also using kinematic effects, slope flow, blocking effects. It includes divergency minimization procedure and micrometeorological model for overland and overwater boundary layers. In Krakow we replace radiosoundings by data from ALADIN/PL. | ||||

CALMET/CAMx | CALMET is a diagnostic model; it interpolates the meteorological data (surface and radiosoundings) also using kinematic effects, slope flows and blocking effects. Vertical velocity is derived from a divergence minimization scheme. | ||||

CLM | |||||

COSMO-2 | non-hydrostatic, compressible | ||||

COSMO-7 | non-hydrostatic, compressible | ||||

COSMO-CLM | |||||

COSMO-MUSCAT | Non-hydrostatic, compressible, surface heterogeneity (orography, land use) | ||||

ENVIRO-HIRLAM | |||||

GEM-AQ | |||||

GESIMA | |||||

GME | |||||

Hirlam | |||||

LAMI | non-hydrostatic compressible | ||||

LME | non-hydrostatic compressible | ||||

LME_MH | |||||

M-SYS | |||||

MC2-AQ | Fully compressible, non hydrostatic Euler equations [Tanguay et al. 1990; Benoit et al. 1997} | ||||

MCCM | |||||

MEMO (UoT-GR) | |||||

MEMO (UoA-PT) | MEMO is a non-hydrostatic model. | ||||

MERCURE | takes into account topography but not earth curvature | ||||

METRAS | |||||

METRAS-PCL | |||||

MM5 (UoA-GR) | MM5 3.6.1 is a non-hydrostatic model | ||||

MM5 (UoA-PT) | |||||

MM5 (UoH-UK) | |||||

MM5(GKSS-D) | |||||

Meso-NH | The model is based upon the Lipps and Hemler anelastic system. | ||||

NHHIRLAM | All approximations are possible as options. However HIRLAM is pressure coordinate based model and the approximations do not match exactly. | ||||

RAMS | |||||

RCG | |||||

SAIMM | |||||

TAPM | |||||

UM | No significant approximations to continuous equations. This includes NOT using the shallow atmosphere/traditional approximation common in th emajority of models. | ||||

WRF-ARW | - compressible, non-hydrostatic Euler equations - terrain-following mass vertical coordinate | ||||

WRF/Chem | fully compressible equations |

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