1. General Model Information

Name: Regional Atmospheric Modeling System

Acronym: RAMS

Main medium: air+terrestrial
Main subject: hydrology, meteorology
Organization level: landscape
Type of model: partial differential equations (finite differences)
Main application:
Keywords: Mesoscale, microscale, atmospheric process, visualisation, cartesian grid


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Developed at Colorado State University and ASTeR, Inc
Amalgamation of William Cotton cloud physics model and Roger Pielke
mesoscale model, with contributions from many other scientists


RAMS (Regional Atmospheric Modeling System) is an atmospheric numerical model that can be used for simulating and forecasting meteorological phenomena and for depicting the results over a large range of temporal and spatial scales. The model was developed by ASTeR (Atmospheric Simulation, Testing and Research Inc., Ft. Collins, Colorado).

The model has atmospheric, isentropic and visualization components. It accepts as input the NMC or ECMWF 2.5-degree resolution global atmospheric gridded datasets containing horizontal wind components, temperature and relative humidity. Other input data requirements are soil type, vegetation types, terrain elevations, sea surface temperatures, albedo, soil temperatures and soil moisture. The model output includes horizontal and vertical wind components, temperatures, concentration of rain, liquid and solid precipitation amounts and sea level pressures.

The temporal range of model execution is from minutes to days. RAMS may be used for any spatial scale. Microscale phenomena such as tornadoes and boundary-layer eddies have been simulated with the model.

Author of the abstract:


II. Technical Information

II.1 Executables:

Operating System(s): UNIX. It requires the GKS version of NCAR Graphics to be executed.

II.2 Source-code:

Programming Language(s): FORTRAN

II.3 Manuals:

II.4 Data:

III. Mathematical Information

III.1 Mathematics

III.2 Quantities

III.2.1 Input

III.2.2 Output

IV. References

Pielke, R.A., D.S. Schimel, T.J. Lee, T.G.F. Kittel,and X. Zeng. 1993. Atmospheric-terrestrial ecosystem interactions: implications forcoupled modeling. Ecol. Mod. 5-18.
Walko, R.L., R.A. Pielke, J. Baron, D. Schimel, W.J. Parton, D. Ojima, T.G.F. Kittel, T.J.Lee, and C.J. Tremback, 1996: Methods of coupling RAMS with ecosystem models. Inpreparation.

V. Further information in the World-Wide-Web

VI. Additional remarks

Global change implications: RAMS has been used in conjunctionwith other models (e.g. ecosystem models) to examine the effects of changesin climate on vegetative growth (Pielke et al., 1993).

Last review of this document by: 13.4.1997 -
Status of the document:
last modified by Tobias Gabele Wed Aug 21 21:44:48 CEST 2002

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