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to GEOGRID.TBL in the geogrid directory (or in the directory specified byopt_geogrid_tbl_path, if this variable is set in the namelist).> ls geogrid/GEOGRID.TBLlrwxrwxrwx 115 GEOGRID.TBL -> GEOGRID.TBL.ARWFor more details on the meaning and possible values for each variable, the user is referredto a description of the namelist variables.Having suitably defined the simulation coarse domain and nested domains in thenamelist.wps file, the geogrid.exe executable may be run to produce domain files. In thecase of ARW domains, the domain files are named geo_em.d0N.nc, where N is thenumber of the nest defined in each file. When run for NMM domains, geogrid producesthe file geo_nmm.d01.nc for the coarse domain, and geo_nmm_nest.l0N.nc files foreach nesting level N. Also, note that the file suffix will vary depending on theio_form_geogrid that is selected. To run geogrid, issue the following command:> ./geogrid.exeWhen geogrid.exe has finished running, the message!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! Successful completion of geogrid. !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!should be printed, and a listing of the WPS root directory (or the directory specified byopt_output_from_geogrid_path, if this variable was set) should show the domain files.If not, the geogrid.log file may be consulted in an attempt to determine the possible causeof failure. For more information on checking the output of geogrid, the user is referred tothe section on checking WPS output.> lsdrwxr-xr-x 2-rwxr-xr-x 14096 arch1672 clean-rwxr-xr-x 1 3510 compile-rw-r--r-- 1-rwxr-xr-x 185973 compile.output4257 configure-rw-r--r-- 1 2486 configure.wps-rw-r--r-- 1 1957004 geo_em.d01.nc-rw-r--r-- 1 4745324 geo_em.d02.ncdrwxr-xr-x 4 4096 geogridlrwxrwxrwx 1-rw-r--r-- 123 geogrid.exe -> geogrid/src/geogrid.exe11169 geogrid.log-rwxr-xr-x 1 1328 link_grib.cshdrwxr-xr-x 3lrwxrwxrwx 14096 metgrid23 metgrid.exe -> metgrid/src/metgrid.exe-rw-r--r-- 1 1094 namelist.wps-rw-r--r-- 1-rw-r--r-- 11987 namelist.wps.all_options1075 namelist.wps.global-rw-r--r-- 1 652 namelist.wps.nmm-rw-r--r-- 1drwxr-xr-x 44786 README4096 ungriblrwxrwxrwx 1 21 ungrib.exe -> ungrib/src/ungrib.exedrwxr-xr-x 3 4096 util<strong>WRF</strong>-NMM V3: User’s Guide 3-7
Step 2: Extracting meteorological fields from GRIB files with ungribHaving already downloaded meteorological data in GRIB format, the first step inextracting fields to the intermediate format involves editing the “share” and “ungrib”namelist records of the namelist.wps file – the same file that was edited to define thesimulation domains. An example of the two namelist records is given below.&sharewrf_core = 'ARW',max_dom = 2,start_date = '2008-03-24_12:00:00','2008-03-24_12:00:00',end_date = '2008-03-24_18:00:00','2008-03-24_12:00:00',interval_seconds = 21600,io_form_geogrid = 2/&ungribout_format = 'WPS',prefix = 'FILE'/In the “share” namelist record, the variables that are of relevance to ungrib are thestarting and ending times of the coarse domain (start_date and end_date; alternatively,start_year, start_month, start_day, start_hour, end_year, end_month, end_day,and end_hour) and the interval between meteorological data files (interval_seconds).In the “ungrib” namelist record, the variable out_format is used to select the format ofthe intermediate data to be written by ungrib; the metgrid program can read any of theformats supported by ungrib, and thus, any of 'WPS', 'SI', and 'MM5' may be specifiedfor out_format, although 'WPS' is recommended. Also in the "ungrib" namelist, the usermay specify a path and prefix for the intermediate files with the prefix variable. Forexample, if prefix were set to 'ARGRMET', then the intermediate files created by ungribwould be named according to AGRMET:YYYY-MM-DD_HH, where YYYY-MM-DD_HHis the valid time of the data in the file.After suitably modifying the namelist.wps file, a Vtable must be supplied, and the GRIBfiles must be linked (or copied) to the filenames that are expected by ungrib. The WPS issupplied with Vtable files for many sources of meteorological data, and the appropriateVtable may simply be symbolically linked to the file Vtable, which is the Vtable nameexpected by ungrib. For example, if the GRIB data are from the GFS model, this could beaccomplished with> ln -s ungrib/Variable_Tables/Vtable.GFS VtableThe ungrib program will try to read GRIB files named GRIBFILE.AAA,GRIBFILE.AAB, …, GRIBFILE.ZZZ. In order to simplify the work of linking the GRIBfiles to these filenames, a shell script, link_grib.csh, is provided. The link_grib.csh scripttakes as a command-line argument a list of the GRIB files to be linked. For example, if<strong>WRF</strong>-NMM V3: User’s Guide 3-8
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ForewordUser's Guide for the NMM Co
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• WPP Directory Structure 7-3•
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The WRF modeling system software is
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WRF-NMM FLOW CHARTTerrestrialDataMo
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Vendor Hardware OS CompilerCray X1
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If all of these executables are def
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Once the tar file is obtained, gunz
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HWRF is set, then (3) will be autom
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In addition to these three links, a
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• Real-data simulations• Non-hy
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k. Morrison double-moment scheme (1
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g. GFDL surface layer (88): (This s
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Other physics optionsa. gwd_opt: Gr
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to the convergence of meridians app
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Variable NamesValue(Example)Descrip
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mpirun.lsf wrf.exeand for interacti
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The boundary conditions for the nes
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Examples:1. One nest and one level
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ottom_top_stag = 28 ;soil_layers_st
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float HLENSW(Time, south_north, wes
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float HBOTS(Time, south_north, west
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operational mesoscale Eta model. J.
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Mlawer, E. J., S. J. Taubman, P. D.
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NCEP WRF Postprocessor (WPP)WPP Int
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./configureYou will be given a list
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equested output field. If the pre-r
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RAINCV SNOW HBOTRAINNCVSNOWCNote: F
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Running WPPFour scripts for running
Page 65 and 66: i. As the grid id of a pre-defined
Page 67 and 68: The GrADS package is available from
Page 69 and 70: Height on pressure surface HEIGHT O
Page 71 and 72: MELTPrecipitation type (4 types) -
Page 73 and 74: Press at tropopause PRESS AT TROPOP
Page 75 and 76: RIP4RIP IntroductionRIP (which stan
Page 77 and 78: A successful compilation will resul
Page 79 and 80: iinterp = 0v v v v vH V H V h h h h
Page 81 and 82: espectively, of the centered domain
Page 83 and 84: This can be either 'h' (for hours),
Page 85: eal variable expect values that are
Page 88 and 89: of all the requested trajectories a
Page 90 and 91: Creating Vis5D Dataset with RIPVis5
Page 92 and 93: User’s Guide for the NMM Core of
Page 94 and 95: Configuration: The configure script
Page 96 and 97: This program reads the contents of
Page 98 and 99: Period - Describes communications f
Page 100 and 101: fine grid), f (forcing, how the lat
Page 102 and 103: # halo HALO_NMM_K dyn_nmm8:q2;24:t
Page 104 and 105: (http://www.mmm.ucar.edu/wrf/WG2/Ti
Page 106 and 107: User's Guide for the NMM Core of th
Page 108 and 109: 2. Make sure the files listed below
Page 110 and 111: User's Guide for the NMM Core of th
Page 112 and 113: Program geogridThe purpose of geogr
Page 114 and 115: 1. Define a model coarse domain and
Page 118 and 119: the GRIB data were downloaded to th
Page 120 and 121: By this point, there is generally n
Page 122 and 123: two nests are defined to have the s
Page 124 and 125: Note: For the WRF-NMM the variables
Page 126 and 127: simulations may use a constant SST
Page 128 and 129: entire simulation domain, and data
Page 130 and 131: that lists the variables and attrib
Page 132 and 133: http://www.ecmwf.int/products/data/
Page 134 and 135: intermediate formats (metgrid/src/r
Page 136 and 137: GRIB1| Level| From | To |Param| Typ
Page 138 and 139: corresponding source grid point. Gi
Page 140 and 141: tile_x = 1200tile_y = 1200tile_z =
Page 142 and 143: 1. PARENT_ID : A list of MAX_DOM in
Page 144 and 145: V -DX- H| / |DY dx DY| / |H - DX- V
Page 146 and 147: intermediate files if ungrib is to
Page 148 and 149: the index and data tiles for the da
Page 150 and 151: 1. PROJECTION : A character string
Page 152 and 153: 25. SCALE_FACTOR : A real value tha
Page 154 and 155: 10. INTERP_MASK : The name of the f
Page 156 and 157: 1. four_pt : Four-point bi-linear i
Page 158 and 159: 8. search : Breadth-first search in
Page 160 and 161: 19 Mixed Tundra20 Barren TundraTabl
Page 162 and 163: LU_INDEX:units = "category" ;LU_IND
Page 164 and 165: netcdf met_em.d01.2009-01-05_12:00:
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}:ISOILWATER = 14 ;:grid_id = 1 ;:p
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