WRF ARW User's Guide - MMM - UCAR

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OBSGRID If a users wishes to include observations from outside the interested model domain, geogrid.exe (WPS) needs to be run for a slightly large domain that the domain of interest. Setting trim_domain to .TRUE. will cut all 4 directions of the input domain down by the number of grid points set in trim_value. In the example below, the domain of interest is the inner white domain with a total of 100x100 grid points. geogrid.exe have be run for the outer domain (110x110 grid points). By setting trim_value to 5, the output domain will be trimmed by 5 grid points in each direction, resulting in the white 100x100 grid point domain. Namelist record3 The data in the record3 concern space allocated within the program for observations. These are values that should not frequently need to be modified: Namelist Variable Value Description max_number_of_obs 10000 Anticipated maximum number of reports per time period fatal_if_exceed_max_obs .TRUE. T/F flag allows the user to decide the severity of not having enough space to store all of the available observation Namelist record4 The data in record4 set the quality control options. There are four specific tests that may be activated by the user: An error max test; a buddy test; removal of spike, and; the removal of super-adiabatic lapse rates. For some of these tests a user have control over the tolerances as well. WRF-ARW V3: User’s Guide 7-18
Namelist Variable Value Description OBSGRID Error Max Test: For this test there is a threshold for each variable. These values are scaled for time of day, surface characteristics and vertical level. qc_test_error_max .TRUE. Check the difference between the first-guess and the observation max_error_t 10 Maximum allowable temperature difference (K) max_error_uv 13 Maximum allowable horizontal wind component difference (m/s) max_error_z 8 Not used max_error_rh 50 Maximum allowable relative humidity difference (%) max_error_p 600 Maximum allowable sea-level pressure difference (Pa Buddy Check Test: For this test there is a threshold for each variable. These values are similar to standard deviations. qc_test_buddy .TRUE. Check the difference between a single observation and neighboring observations max_buddy_t 8 Maximum allowable temperature difference (K) max_buddy_uv 8 Maximum allowable horizontal wind component difference (m/s) max_buddy_z 8 Not used max_buddy_rh 40 Maximum allowable relative humidity difference (%) max_buddy_p 800 Maximum allowable sea-level pressure difference (Pa) buddy_weight Spike removal 1.0 Value by which the buddy thresholds are scale qc_test_vert_consistency .FALSE. Check for vertical spikes in temperature, dew point, wind speed and wind direction Removal of super-adiabatic lapse rates qc_test_convective_adj .FALSE. Remove any super-adiabatic lapse rate in a sounding by conservation of dry static energy WRF-ARW V3: User’s Guide 7-19
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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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that the MODIS-based categories sho
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should be set to a list of prefixes
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WPS If no field is found in more th
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WPS Output from the ungrib program
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5 19121.152344 0.093761623 6 19371.
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WPS ! 0 = cylindrical equidistant !
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The meanings of the level fields ar
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not possible to write a geogrid bin
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Description of the Namelist Variabl
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3. I_PARENT_START : A list of MAX_D
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21. POLE_LON : For the latitude-lon
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2. PRIORITY : An integer specifying
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Default value is null (i.e., no dom
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17. TILE_Y : An integer specifying
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5. FROM_INPUT : A character string
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21. FLAG_IN_OUTPUT : A character st
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6. wt_average_16pt : Weighted sixte
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Table 2: IGBP-Modified MODIS 20-cat
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float MAPFAC_MY(Time, south_north,
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:corner_lons = -93.64893f, -92.3966
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:SOUTH-NORTH_PATCH_END_UNSTAG = 60
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Table of Contents Chapter 4: WRF In
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INITIALIZATION programs should be r
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INITIALIZATION o Symmetric north an
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INITIALIZATION • Link the WPS fil
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Table of Contents Chapter 5: WRF Mo
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MODEL Hint: If using netCDF-4, make
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Enter appropriate options that are
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. Real-data case For a real-data ca
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MODEL eta_levels: model eta levels
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estart file named wrfrst_d_ will be
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Real Data Cases MODEL For real-data
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MODEL The purpose of this step is t
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f. Moving-Nested Run MODEL Two type
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MODEL Spectral Nudging is a new upp
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MODEL data and update these fields.
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MODEL If the model did not run to c
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2.1 Longwave Radiation (ra_lw_physi
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MODEL km_opt = 2 or 3, see below. A
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MODEL b. Vertical velocity damping
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MODEL The value of relax_zone may b
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MODEL cycling F whether this run is
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MODEL max_dom 1 number of domains -
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MODEL when SKINTEMP is not present.
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MODEL 0 no action taken, no adjustm
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MODEL 3 NCEP GFS scheme (NMM only),
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MODEL 5-layer slab scheme, set to l
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MODEL if_zfac_ph (max_dom) 0 0= nud
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MODEL obs_prt_freq (max_dom)10 freq
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MODEL recommended, except for highl
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&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
Page 169 and 170: WRF-VAR > ln -sf WRFDA/var/run/VARB
Page 171 and 172: WRF-VAR RTMINIT_NSENSOR = 12 # 5 AM
Page 173 and 174: WRF-VAR tions are present to keep t
Page 175 and 176: 6: U.S. Standard Atmosphere WRF-VAR
Page 177 and 178: WRF-VAR clwp: cloud liquid water pa
Page 179 and 180: WRF-VAR and/or low boundary conditi
Page 181 and 182: WRF-VAR Note: Larger analysis incre
Page 183 and 184: WRF-VAR The variance of each variab
Page 185 and 186: Additional WRF-Var Exercises: (a) S
Page 187 and 188: You may like to compare various dia
Page 189 and 190: WRF-VAR thin_mesh_conv 20. for ob_f
Page 191 and 192: WRF-VAR &wrfvar7 cv_options 5 3: NC
Page 193 and 194: WRF-VAR warnings_are_fatal false cl
Page 195 and 196: WRF-VAR use_antcorr false (max_inst
Page 197 and 198: 'v' = Y-direction component of wind
Page 199 and 200: WRF-VAR obs_gpspw_read.diag print_r
Page 201 and 202: write_satem If keep satem obs in ob
Page 203 and 204: Table of Contents Chapter 7: Object
Page 205 and 206: OBSGRID • Provide surface fields
Page 207 and 208: Banana Scheme OBSGRID In analyses o
Page 209 and 210: Objective Analysis on Model Nests O
Page 211 and 212: Check your output OBSGRID Examine t
Page 213 and 214: OBSGRID • All reports for each se
Page 215 and 216: Each report in the wrf_obs/little_r
Page 217 and 218: OBSGRID The end data record is simp
Page 219: OBSGRID remove_data_above_qc_flag 2
Page 223 and 224: Namelist record8 OBSGRID The data i
Page 225 and 226: Chapter 8: WRF Software Table of Co
Page 227 and 228: SOFTWARE variable like MPICH_F90 to
Page 229 and 230: SOFTWARE time configuration options
Page 231 and 232: SOFTWARE While the model state and
Page 233 and 234: SOFTWARE u_gc. It is a three dimens
Page 235 and 236: Registry Rconfig: SOFTWARE The Regi
Page 237 and 238: SOFTWARE The parallel communication
Page 239 and 240: WRF source modules and subroutines
Page 241 and 242: Table of Contents • Introduction
Page 243 and 244: POST-PROCESSING It runs on many dif
Page 245 and 246: ; load functions and procedures loa
Page 247 and 248: 3. Create an NCL plotting script. 4
Page 249 and 250: POST-PROCESSING Resources unique to
Page 251 and 252: POST-PROCESSING If you want to add
Page 253 and 254: wrf_user_ll_to_ij (nc_file, lons, l
Page 255 and 256: NCL built-in Functions POST-PROCESS
Page 257 and 258: POST-PROCESSING Add the markers NCL
Page 259 and 260: RIP4 POST-PROCESSING RIP (which sta
Page 261 and 262: POST-PROCESSING Will use NETCDF in
Page 263 and 264: The RIP user input file POST-PROCES
Page 265 and 266: Plot Specification Table POST-PROCE
Page 267 and 268: e.g. idt rip_sample.cgm POST-PROCES
Page 269 and 270: 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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