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OpenIFS includes a number of idealised configurations. In this article we explain how to: |
ConfigurationThe shallow-water (SW) configuration is one of several that exist in OpenIFS (and IFS). The configuration is set by the variable NCONF in namelist NAMCT0 (see yomct0.F90). The normal 3D primitive equation configuration uses NCONF=1. For the 2D SW configuration, NCONF=201. The 2D SW model can be initialised in various idealized states or from a single level real field. This initialisation is controlled by another variable, N2DINI in the namelist NAMCT0. As these idealized configurations are primarily research tools, they may vary from one major model release to another and not all options found in the code are guaranteed to work. N2DINI = 1 in NAMCT0 will initialise the Rossby-Haurwitz wave case (Williamson et al, J. Comput. Phys., 1992).
N2DINI = 3 in NAMCT0 will initialise the SW model with real fields read from GRIB. The reader is invited to look in suspecb.F90 to see what other initialisation options as possible (N2DINI=42 does not work). Although there is mention of NCONF=202 (the Vorticity Equation configuration) in the code, this does not work. | 