WRF ARW User's Guide - MMM - UCAR

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MODEL • Various lateral boundary condition options for real-data and idealized simulations • Full physics options, and various filter options • Positive-definite advection scheme • Non-hydrostatic and hydrostatic (runtime option) • One-way, two-way nesting and moving nest • Three-dimensional analysis nudging • Observation nudging • Regional and global applications • Digital filter initialization Other References • WRF tutorial presentation: http://www.mmm.ucar.edu/wrf/users/supports/tutorial.html • WRF-ARW Tech Note: http://www.mmm.ucar.edu/wrf/users/pub-doc.html • Chapter 2 of this document for software requirement. Installing WRF Before compiling WRF code on a computer, check to see if the netCDF library is installed. This is because one of the supported WRF I/O options is netCDF, and it is the one commonly used, and supported by the post-processing programs. If the netCDF is installed in a directory other than /usr/local/, then find the path, and use the environment variable NETCDF to define where the path is. To do so, type setenv NETCDF path-to-netcdf-library Often the netCDF library and its include/ directory are collocated. If this is not the case, create a directory, link both netCDF lib and include directories in this directory, and use environment variable to set the path to this directory. For example, netcdf_links/lib -> /netcdf-lib-dir/lib netcdf_links/include -> /where-include-dir-is/include setenv NETCDF /directory-where-netcdf_links-is/netcdf_links If the netCDF library is not available on the computer, it needs to be installed first. NetCDF source code or pre-built binary may be downloaded from and installation instruction can be found on the Unidata Web page at http://www.unidata.ucar.edu/. Hint: for Linux users: If PGI, Intel or g95 compiler are used on a Linux computer, make sure netCDF is installed using the same compiler. Use NETCDF environment variable to point to the PGI/Intel/g95 compiled netCDF library. WRF-ARW V3: User’s Guide 5-2
MODEL Hint: If using netCDF-4, make sure that the new capabilities (such as parallel I/O based on HDF5) are not activated at the install time. WRF source code tar file can be downloaded from http://www.mmm.ucar.edu/wrf/download/get_source.html. Once the tar file is unzipped (gunzip WRFV3.TAR.gz), and untared (tar –xf WRFV3.TAR), and it will create a WRFV3/ directory. This contains: Makefile Top-level makefile README General information about WRF/ARW core README_test_cases Explanation of the test cases README.NMM General information for WRF/NMM core README.rsl_output For NMM Registry/ Directory for WRF Registry files arch/ Directory where compile options are gathered clean script to clean created files, executables compile script for compiling WRF code configure script to create the configure.wrf file for compile chem/ WRF chemistry, supported by NOAA/GSD dyn_em/ Directory for ARW dynamics and numerics dyn_exp/ Directory for a 'toy' dynamic core dyn_nmm/ Directory for NMM dynamics and numerics, supported by DTC external/ Directory that contains external packages, such as those for IO, time keeping and MPI frame/ Directory that contains modules for WRF framework inc/ Directory that contains include files main/ Directory for main routines, such as wrf.F, and all executables after compilation phys/ Directory for all physics modules run/ Directory where one may run WRF share/ Directory that contains mostly modules for WRF mediation layer and WRF I/O test/ Directory that contains test case directories, may be used to run WRF tools/ Directory that contains tools for developers The steps to compile and run the model are: 1. configure: generate a configuration file for compilation WRF-ARW V3: User’s Guide 5-3
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1. Overview − Introduction ......
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8. WRF Software − Introduction ..
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Table of Contents Chapter 1: Overvi
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OVERVIEW • Map projections for 1)
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Table of Contents Chapter 2: Softwa
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SOFTWARE INSTALLATION Note 1: If on
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Building the WRF Code SOFTWARE INST
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Building the WRF-Var Code SOFTWARE
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Chapter 3: WRF Preprocessing System
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WPS information specified by the us
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Required Libraries The only library
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ls drwxr-xr-x 2 4096 arch -rwxr-xr-
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should be written to may be indicat
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WPS When configuring a rotated lati
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WPS geog_data_path variable. Also,
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WPS supplied with Vtable files for
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&share wrf_core = 'ARW', max_dom =
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&share wrf_core = 'ARW', max_dom =
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Page 41 and 42: should be set to a list of prefixes
Page 43 and 44: WPS If no field is found in more th
Page 45 and 46: WPS Output from the ungrib program
Page 47 and 48: 5 19121.152344 0.093761623 6 19371.
Page 49 and 50: WPS ! 0 = cylindrical equidistant !
Page 51 and 52: The meanings of the level fields ar
Page 53 and 54: not possible to write a geogrid bin
Page 55 and 56: Description of the Namelist Variabl
Page 57 and 58: 3. I_PARENT_START : A list of MAX_D
Page 59 and 60: 21. POLE_LON : For the latitude-lon
Page 61 and 62: 2. PRIORITY : An integer specifying
Page 63 and 64: Default value is null (i.e., no dom
Page 65 and 66: 17. TILE_Y : An integer specifying
Page 67 and 68: 5. FROM_INPUT : A character string
Page 69 and 70: 21. FLAG_IN_OUTPUT : A character st
Page 71 and 72: 6. wt_average_16pt : Weighted sixte
Page 73 and 74: Table 2: IGBP-Modified MODIS 20-cat
Page 75 and 76: float MAPFAC_MY(Time, south_north,
Page 77 and 78: :corner_lons = -93.64893f, -92.3966
Page 79 and 80: :SOUTH-NORTH_PATCH_END_UNSTAG = 60
Page 81 and 82: Table of Contents Chapter 4: WRF In
Page 83 and 84: INITIALIZATION programs should be r
Page 85 and 86: INITIALIZATION o Symmetric north an
Page 87 and 88: INITIALIZATION • Link the WPS fil
Page 89: Table of Contents Chapter 5: WRF Mo
Page 93 and 94: Enter appropriate options that are
Page 95 and 96: . Real-data case For a real-data ca
Page 97 and 98: MODEL eta_levels: model eta levels
Page 99 and 100: estart file named wrfrst_d_ will be
Page 101 and 102: Real Data Cases MODEL For real-data
Page 103 and 104: MODEL The purpose of this step is t
Page 105 and 106: f. Moving-Nested Run MODEL Two type
Page 107 and 108: MODEL Spectral Nudging is a new upp
Page 109 and 110: MODEL data and update these fields.
Page 111 and 112: MODEL If the model did not run to c
Page 113 and 114: 2.1 Longwave Radiation (ra_lw_physi
Page 115 and 116: MODEL km_opt = 2 or 3, see below. A
Page 117 and 118: MODEL b. Vertical velocity damping
Page 119 and 120: MODEL The value of relax_zone may b
Page 121 and 122: MODEL cycling F whether this run is
Page 123 and 124: MODEL max_dom 1 number of domains -
Page 125 and 126: MODEL when SKINTEMP is not present.
Page 127 and 128: MODEL 0 no action taken, no adjustm
Page 129 and 130: MODEL 3 NCEP GFS scheme (NMM only),
Page 131 and 132: MODEL 5-layer slab scheme, set to l
Page 133 and 134: MODEL if_zfac_ph (max_dom) 0 0= nud
Page 135 and 136: MODEL obs_prt_freq (max_dom)10 freq
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Page 139 and 140: &grib2 MODEL background_proc_id 255
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MODEL &tc controls for tc_em.exe on
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float Q2(Time, south_north, west_ea
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E:units = "s-1" ; float SINALPHA(Ti
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map_proj = 1: Lambert Conformal Lis
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Table of Contents Chapter 6: WRF-Va
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WRF-VAR WARNING: It is impossible t
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14. Darwin (MACOS) g95 with gcc (dm
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gzip -cd WRFNL3.1_PATCH.tar.gz | ta
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WRF-VAR Before running obsproc.exe,
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WRF-VAR There is an alternative way
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Observations Background Error Stati
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WRF-VAR / &wrfvar16 / &wrfvar17 / &
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Total number of obs. = 26726 Final
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ln -fs ad/ad_d01_2008-02-05_12:00:0
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WRF-VAR > ln -sf WRFDA/var/run/VARB
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WRF-VAR RTMINIT_NSENSOR = 12 # 5 AM
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WRF-VAR tions are present to keep t
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6: U.S. Standard Atmosphere WRF-VAR
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WRF-VAR clwp: cloud liquid water pa
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WRF-VAR and/or low boundary conditi
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WRF-VAR Note: Larger analysis incre
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WRF-VAR The variance of each variab
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Additional WRF-Var Exercises: (a) S
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You may like to compare various dia
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WRF-VAR thin_mesh_conv 20. for ob_f
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WRF-VAR &wrfvar7 cv_options 5 3: NC
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WRF-VAR warnings_are_fatal false cl
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WRF-VAR use_antcorr false (max_inst
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'v' = Y-direction component of wind
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WRF-VAR obs_gpspw_read.diag print_r
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write_satem If keep satem obs in ob
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Table of Contents Chapter 7: Object
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OBSGRID • Provide surface fields
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Banana Scheme OBSGRID In analyses o
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Objective Analysis on Model Nests O
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Check your output OBSGRID Examine t
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OBSGRID • All reports for each se
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Each report in the wrf_obs/little_r
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OBSGRID The end data record is simp
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OBSGRID remove_data_above_qc_flag 2
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Namelist Variable Value Description
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Namelist record8 OBSGRID The data i
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Chapter 8: WRF Software Table of Co
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SOFTWARE variable like MPICH_F90 to
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SOFTWARE time configuration options
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SOFTWARE While the model state and
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SOFTWARE u_gc. It is a three dimens
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Registry Rconfig: SOFTWARE The Regi
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SOFTWARE The parallel communication
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WRF source modules and subroutines
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Table of Contents • Introduction
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POST-PROCESSING It runs on many dif
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; load functions and procedures loa
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3. Create an NCL plotting script. 4
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POST-PROCESSING Resources unique to
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POST-PROCESSING If you want to add
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wrf_user_ll_to_ij (nc_file, lons, l
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NCL built-in Functions POST-PROCESS
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POST-PROCESSING Add the markers NCL
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RIP4 POST-PROCESSING RIP (which sta
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POST-PROCESSING Will use NETCDF in
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The RIP user input file POST-PROCES
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Plot Specification Table POST-PROCE
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e.g. idt rip_sample.cgm POST-PROCES
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POST-PROCESSING • gribinfo.txt &
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POST-PROCESSING plot ‘all’ Whic
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POST-PROCESSING User will be prompt
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WPP POST-PROCESSING The NCEP WRF Po
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./configure You will be given a lis
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POST-PROCESSING pressure fields on
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POST-PROCESSING • When using the
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POST-PROCESSING 7. Create namelist
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2. Add the location of the GrADS ex
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POST-PROCESSING Column integrated c
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POST-PROCESSING Direct soil evapora
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POST-PROCESSING • Animation Contr
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POST-PROCESSING For example, if the
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5. Read the VAPOR Documentation POS
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Table of Contents • Introduction
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UTILITIES AND TOOLS -ts Generate ti
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iowrf UTILITIES AND TOOLS This util
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fields List of fields to process. d
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&tc insert_bogus_storm = .true. rem
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./v_interp wrfinput_d01 wrfinput_d0
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Design WRF model domains WPS/util/p
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GRIB data UTILITIES AND TOOLS ncrca
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WRF ARW User's Guide - MMM - UCAR

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