| Numerical models |
| Meteorological mesoscale models | Sound propagation models | REWISYS postprocessing and plotting | Links |
Meteorological mesoscale models (click model name for references and further details)
The models REWIH3D, FITNAH and FLU3D are operated at DLR for modelling
the atmosphere in the context of regional
climate research, mesoscale meteorology, and sound
propagation.
The models REWISIM and REWIMET are no longer used at DLR.
| REWISIM | REWIMET | REWIH3D | FITNAH |
|
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| developped at | Free University of Berlin | University of Munich | DLR | Techn. University of Darmstadt | DLR |
| developped by | D.Heimann | D.Heimann | D.Heimann | G. Groß | D.Heimann |
| space scale | meso-b | meso-b | meso-a , meso-b | meso-g, (micro-a) | micro-b |
| typical horizontal resolution | 4 - 10 km | 4 - 10 km | 4 - 100 km | (2 m) 200 m - 2 km | 0.1 - 2 m |
| typical vertical resolution | none | 50 m near ground | 20 m near ground | 2 m near ground | 0.1 - 2 m |
| nesting | no | no | yes (multiple) | no | no |
| time-dependent external forcing | no | no | supra-scale analyses of
model results |
supra-scale analyses of
model results |
no |
| design | diagnostic | prognostic | prognostic | prognostic | diagnostic |
| dynamics | hydrostatic | hydrostatic | hydrostatic | non-hydrostatic | compressible, adiabatic |
| geometry | 2D - 1-level model | 3D - 3-layer model | 3D - multi-level model | 3D - multi-level model | 2D / 3D |
| vertical coordinate | terrain-following level | lowest layer terrain following | transformed | transformed | regular |
| orography | yes | yes | yes | yes | yes |
| obstacles (e.g. buildings) | via roughness | via roughness | via roughness | parameterized | yes |
| canopy (e.g. trees) | via roughness | via roughness | via roughness | parameterized | no |
| turbulence | parameterized - resistence | parameterized - resistence | parameterized - TKE | parameterized - TKE | parameterized - TKE |
| soil model | no | no | yes - force-restore or multi-layer | yes - multi-layer | no |
| radiation fluxes | no | no | yes - shortwave / longwave | yes - shortwave / longwave | no |
| clouds and precipitation | no | no | yes (liquid and solid) | no | no |
| deep convection | no | no | parameterized | no | no |
| transport of tracers | no | yes - Euler | yes - Euler | via subsequent simulation | not implemented yet |
| REWISYS interface
for plotting and post-processing |
yes - type 1 | yes - type 1, 4 | yes - type 1, 3, 4 | yes - type 1, 3, 4 | yes - type 1, 3 |
| remarks | non-linear version of AKU3D |
| AKUMET | AKU3D | |||
| developped at | DLR | DLR | ||
| developped by | D.Heimann | D.Heimann, R.Blumrich | ||
| range | 100 m - 5 km | 10 m - 500 m | ||
| design | Lagrange (ray based) - linear dynamics | Euler (grid based) - linear dynamics | ||
| dimension | 2D / 3D | 2D / 3D | ||
| terrain | yes - smooth | yes - steps | ||
| obstacles | yes - random or explicitly specified | yes - explicitly specified | ||
| grid | terrain following | regular | ||
| inhomogeneous ground | yes - complex impedence | yes - real impedence or explicit 'porosity' | ||
| inhomogeneous meteorology | yes - wind (u, v, w), temperature, humidity, TKE | yes - wind (u, v, w), density, humidity | ||
| source | 2D: line source, 3D: point source | 2D: line source, 3D: point source | ||
| directivity of source | yes | no (uniform radiation) | ||
| frequency range | 100 - 5000 Hz | 10 - 500 Hz | ||
| Multi-frequency noise | yes | restricted | ||
| refraction by temperature gradients | yes | yes | ||
| refraction by wind gradients | yes | yes | ||
| refraction by wind and temperature gradients in combination | yes | yes | ||
| scattering by turbulence | parameterized | planned | ||
| absorption | parameterized | parameterized (single frequency only) | ||
| defraction (into shadows) | parameterized | yes | ||
| data input from meteo model | FITNAH | FITNAH, FLU3D | ||
| REWISYS interface
for plotting and post-processing |
yes - type 2 | yes - type 1, 2, 3 | ||
| remarks | linear version of FLU3D with
prescribed meteorological parameters |
REWISYS is the common system of standard file types used for post-processing and plotting.
R3DPP, F3DPP and A3DPP are post-processors for REWIH3D, FITNAH/ASMUS-F and AKU3D, respectively. These programmes read the 3D output of the simulation models [Type 3] for different time slices and extract selected 2D fields (horizontal fields on model levels / parallel to sea level / parallel to the terrain [Type 1] and vertical cross-sections along x-axis/y- axis/oblique [Type 2]).
REWIplot is an IDL-based software package for the visualization of 3D model output.
NCAR - Mesoscale and Microscale Meteorology Division
Colorado State University - Regional Atmospheric Modeling System RAMS
| Last modified 23 October 2000 |