WRF - Developmental Testbed Center

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http://www.ecmwf.int/products/data/technical/model_levels/index.html. This table shouldbe written in plain text to a file, ecmwf_coeffs, in the current working directory; forexample, with 16 sigma levels, the file emcwf_coeffs would contain something like:0 0.000000 0.0000000001 5000.000000 0.000000000239890.51953114166.3046880.0017207640.0131976234 17346.066406 0.0422171355619121.15234419371.2500000.0937616230.1695713407 18164.472656 0.2680156838915742.18359412488.0507810.3842744830.51083087910 8881.824219 0.63826847111125437.5390632626.2578130.7563848500.85561275513 783.296631 0.92874622314150.0000000.0000000.9729852680.99228191416 0.000000 1.000000000Additionally, if soil height (or soil geopotential), 3-d temperature, and 3-d specifichumidity fields are available, calc_ecmwf_p.exe computes a 3-d geopotential heightfield, which is required to obtain an accurate vertical interpolation in the real program.Given a set of intermediate files produced by ungrib and the file ecmwf_coeffs,calc_ecmwf_p loops over all time periods in namelist.wps, and produces an additionalintermediate file, PRES:YYYY-MM-DD_HH, for each time, which contains pressure andgeopotential height data for each full sigma level, as well as a 3-d relative humidity field.This intermediate file should be specified to metgrid, along with the intermediate dataproduced by ungrib, by adding 'PRES' to the list of prefixes in the fg_name namelistvariable.D. plotgrids.exeThe plotgrids.exe program is an NCAR Graphics-based utility whose purpose is to plotthe locations of all nests defined in the namelist.wps file. The program operates on thenamelist.wps file, and thus, may be run without having run any of the three main WPSprograms. Upon successful completion, plotgrids produces an NCAR Graphics metafile,gmeta, which may be viewed using the idt command. The coarse domain is drawn to fillthe plot frame, a map outline with political boundaries is drawn over the coarse domain,and any nested domains are drawn as rectangles outlining the extent of each nest. Thisutility may be useful particularly during initial placement of domains, at which time theuser can iteratively adjust the locations of nests by editing the namelist.wps file, runningplotgrids.exe, and determining a set of adjustments to the nest locations. Currently, thisutility does not work for ARW domains that use the latitude-longitude projection (i.e.,when map_proj = 'lat-lon').E. g1print.exeWRF-NMM V3: User’s Guide 3-23
The g1print.exe program takes as its only command-line argument the name of a GRIBEdition 1 file. The program prints a listing of the fields, levels, and dates of the data inthe file.F. g2print.exeSimilar to g1print.exe, the g2print.exe program takes as its only command-line argumentthe name of a GRIB Edition 2 file. The program prints a listing of the fields, levels, anddates of the data in the file.G. plotfmt.exeThe plotfmt.exe is an NCAR Graphics program that plots the contents of an intermediateformat file. The program takes as its only command-line argument the name of the file toplot, and produces an NCAR Graphics metafile, which contains contour plots of eachfield in input file. The graphics metafile output, gmeta, may be viewed with the idtcommand, or converted to another format using utilities such as ctrans.H. rd_intermediate.exeGiven the name of a singe intermediate format file on the command line, therd_intermediate.exe program prints information about the fields contained in the file.WRF Domain WizardWRF Domain Wizard is a graphical user interface (GUI) which interacts with the WPSand enables users to easily define domains, create a namelist.wps and run geogrid,ungrib, and metgrid. A helpful online tutorial can be found at:http://wrfportal.org/DomainWizard.html.Writing Meteorological Data to the Intermediate FormatThe role of the ungrib program is to decode GRIB data sets into a simple intermediateformat that is understood by metgrid. If meteorological data are not available in GRIBEdition 1 or GRIB Edition 2 formats, the user is responsible for writing such data into theintermediate file format. Fortunately, the intermediate format is relatively simple,consisting of a sequence of unformatted Fortran writes. It is important to note that theseunformatted writes use big-endian byte order, which can typically be specified withcompiler flags. Below, we describe the WPS intermediate format; users interested in theSI or MM5 intermediate formats can first gain familiarity with the WPS format, which isvery similar, and later examine the Fortran subroutines that read and write all threeWRF-NMM V3: User’s Guide 3-24
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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
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i. As the grid id of a pre-defined
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The GrADS package is available from
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Height on pressure surface HEIGHT O
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MELTPrecipitation type (4 types) -
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Press at tropopause PRESS AT TROPOP
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RIP4RIP IntroductionRIP (which stan
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A successful compilation will resul
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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 116 and 117: to GEOGRID.TBL in the geogrid direc
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 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:
Page 166: }:ISOILWATER = 14 ;:grid_id = 1 ;:p
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WRF - Developmental Testbed Center

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