WRF - Developmental Testbed Center

Variable NamesValue(Example)Descriptionptsgm 42000. Pressure level (Pa) in which the WRF-NMMhybrid coordinate transitions from sigma topressureeta_levels 1.00, 0.99,…0.00Model eta levels. If this is not specifiedreal_nmm.exe will provide a set of levels.num_metgrid_levels 40 Number of vertical levels in the incoming data:type ncdump –h to find outgrid_id (max_dom) 1 Domain identifier.parent_id (max_dom) 0 ID of the parent domain. Use 0 for the coarsestgrid.i_parent_start (max_dom) 1j_parent_start (max_dom) 1parent_grid_ratio(max_dom)parent_time_step_ratio(max_dom)Defines the LLC of the nest as this I-index ofthe parent domain. Use 1 for the coarsest grid.Defines the LLC of the nest in this J-index ofthe parent domain. Use 1 for the coarsest grid.3 Parent-to-nest domain grid size ratio. For WRF-NMM this ratio must be 3.3 Parent-to-nest time step ratio. For WRF-NMMthis ratio must be 3.feedback 1 Feedback from nest to its parent domain; 0 = nofeedbacknum_moves -99 Vortex following moving nest is enabled whennum_moves=-99. This flag is only for theHWRF configuration.tile_sz_x 0 Number of points in tile x direction.tile_sz_y 0 Number of points in tile y direction.numtiles 1 Number of tiles per patch (alternative to abovetwo items).nproc_x -1 Number of processors in x–direction fordecomposition.nproc_y -1 Number of processors in y-direction fordecomposition:If -1: code will do automatic decomposition.If >1 for both: will be used for decomposition.&physicsPhysics optionschem_opt 0 Chemistry option - not yet availableWRF-NMM V3: User’s Guide 5-14