WRF ARW User's Guide - MMM - UCAR

More documents

Recommendations

Info

WPS -rw-r--r-- 1 4745324 geo_em.d02.nc drwxr-xr-x 4 4096 geogrid lrwxrwxrwx 1 23 geogrid.exe -> geogrid/src/geogrid.exe -rw-r--r-- 1 11169 geogrid.log -rwxr-xr-x 1 1328 link_grib.csh drwxr-xr-x 3 4096 metgrid lrwxrwxrwx 1 23 metgrid.exe -> metgrid/src/metgrid.exe -rw-r--r-- 1 1094 namelist.wps -rw-r--r-- 1 1987 namelist.wps.all_options -rw-r--r-- 1 1075 namelist.wps.global -rw-r--r-- 1 652 namelist.wps.nmm -rw-r--r-- 1 4786 README drwxr-xr-x 4 4096 ungrib lrwxrwxrwx 1 21 ungrib.exe -> ungrib/src/ungrib.exe drwxr-xr-x 3 4096 util Step 2: Extracting meteorological fields from GRIB files with ungrib Having already downloaded meteorological data in GRIB format, the first step in extracting 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 the simulation domains. An example of the two namelist records is given below. &share wrf_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 / &ungrib out_format = 'WPS', prefix = 'FILE' / In the “share” namelist record, the variables that are of relevance to ungrib are the starting 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 of the intermediate data to be written by ungrib; the metgrid program can read any of the formats supported by ungrib, and thus, any of 'WPS', 'SI', and 'MM5' may be specified for out_format, although 'WPS' is recommended. Also in the "ungrib" namelist, the user may specify a path and prefix for the intermediate files with the prefix variable. For example, if prefix were set to 'ARGRMET', then the intermediate files created by ungrib would be named according to AGRMET:YYYY-MM-DD_HH, where YYYY-MM-DD_HH is the valid time of the data in the file. After suitably modifying the namelist.wps file, a Vtable must be supplied, and the GRIB files must be linked (or copied) to the filenames that are expected by ungrib. The WPS is WRF-ARW V3: User’s Guide 3-14
WPS supplied with Vtable files for many sources of meteorological data, and the appropriate Vtable may simply be symbolically linked to the file Vtable, which is the Vtable name expected by ungrib. For example, if the GRIB data are from the GFS model, this could be accomplished with > ln -s ungrib/Variable_Tables/Vtable.GFS Vtable The ungrib program will try to read GRIB files named GRIBFILE.AAA, GRIBFILE.AAB, …, GRIBFILE.ZZZ. In order to simplify the work of linking the GRIB files to these filenames, a shell script, link_grib.csh, is provided. The link_grib.csh script takes as a command-line argument a list of the GRIB files to be linked. For example, if the GRIB data were downloaded to the directory /data/gfs, the files could be linked with link_grib.csh as follows: > ls /data/gfs -rw-r--r-- 1 42728372 gfs_080324_12_00 -rw-r--r-- 1 48218303 gfs_080324_12_06 > ./link_grib.csh /data/gfs/gfs* After linking the GRIB files and Vtable, a listing of the WPS directory should look something like the following: > ls drwxr-xr-x 2 4096 arch -rwxr-xr-x 1 1672 clean -rwxr-xr-x 1 3510 compile -rw-r--r-- 1 85973 compile.output -rwxr-xr-x 1 4257 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.nc drwxr-xr-x 4 4096 geogrid lrwxrwxrwx 1 23 geogrid.exe -> geogrid/src/geogrid.exe -rw-r--r-- 1 11169 geogrid.log lrwxrwxrwx 1 38 GRIBFILE.AAA -> /data/gfs/gfs_080324_12_00 lrwxrwxrwx 1 38 GRIBFILE.AAB -> /data/gfs/gfs_080324_12_06 -rwxr-xr-x 1 1328 link_grib.csh drwxr-xr-x 3 4096 metgrid lrwxrwxrwx 1 23 metgrid.exe -> metgrid/src/metgrid.exe -rw-r--r-- 1 1094 namelist.wps -rw-r--r-- 1 1987 namelist.wps.all_options -rw-r--r-- 1 1075 namelist.wps.global -rw-r--r-- 1 652 namelist.wps.nmm -rw-r--r-- 1 4786 README drwxr-xr-x 4 4096 ungrib lrwxrwxrwx 1 21 ungrib.exe -> ungrib/src/ungrib.exe drwxr-xr-x 3 4096 util lrwxrwxrwx 1 33 Vtable -> ungrib/Variable_Tables/Vtable.GFS After editing the namelist.wps file and linking the appropriate Vtable and GRIB files, the ungrib.exe executable may be run to produce files of meteorological data in the intermediate format. Ungrib may be run by simply typing the following: > ./ungrib.exe >& ungrib.output WRF-ARW V3: User’s Guide 3-15
Page 1 and 2: ��
Page 3 and 4: 1. Overview − Introduction ......
Page 5 and 6: 8. WRF Software − Introduction ..
Page 7 and 8: Table of Contents Chapter 1: Overvi
Page 9 and 10: OVERVIEW • Map projections for 1)
Page 11 and 12: Table of Contents Chapter 2: Softwa
Page 13 and 14: SOFTWARE INSTALLATION Note 1: If on
Page 15 and 16: Building the WRF Code SOFTWARE INST
Page 17 and 18: Building the WRF-Var Code SOFTWARE
Page 19 and 20: Chapter 3: WRF Preprocessing System
Page 21 and 22: WPS information specified by the us
Page 23 and 24: Required Libraries The only library
Page 25 and 26: ls drwxr-xr-x 2 4096 arch -rwxr-xr-
Page 27 and 28: should be written to may be indicat
Page 29 and 30: WPS When configuring a rotated lati
Page 31: WPS geog_data_path variable. Also,
Page 35 and 36: &share wrf_core = 'ARW', max_dom =
Page 37 and 38: &share wrf_core = 'ARW', max_dom =
Page 39 and 40: that the MODIS-based categories sho
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 and 90:
Table of Contents Chapter 5: WRF Mo
Page 91 and 92:
MODEL Hint: If using netCDF-4, make
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
Page 137 and 138:
MODEL recommended, except for highl
Page 139 and 140:
&grib2 MODEL background_proc_id 255
Page 141 and 142:
MODEL &tc controls for tc_em.exe on
Page 143 and 144:
float Q2(Time, south_north, west_ea
Page 145 and 146:
E:units = "s-1" ; float SINALPHA(Ti
Page 147 and 148:
map_proj = 1: Lambert Conformal Lis
Page 149 and 150:
Table of Contents Chapter 6: WRF-Va
Page 151 and 152:
WRF-VAR WARNING: It is impossible t
Page 153 and 154:
14. Darwin (MACOS) g95 with gcc (dm
Page 155 and 156:
gzip -cd WRFNL3.1_PATCH.tar.gz | ta
Page 157 and 158:
WRF-VAR Before running obsproc.exe,
Page 159 and 160:
WRF-VAR There is an alternative way
Page 161 and 162:
Observations Background Error Stati
Page 163 and 164:
WRF-VAR / &wrfvar16 / &wrfvar17 / &
Page 165 and 166:
Total number of obs. = 26726 Final
Page 167 and 168:
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 and 220:
OBSGRID remove_data_above_qc_flag 2
Page 221 and 222:
Namelist Variable Value Description
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 &
Page 271 and 272:
POST-PROCESSING plot ‘all’ Whic
Page 273 and 274:
POST-PROCESSING User will be prompt
Page 275 and 276:
WPP POST-PROCESSING The NCEP WRF Po
Page 277 and 278:
./configure You will be given a lis
Page 279 and 280:
POST-PROCESSING pressure fields on
Page 281 and 282:
POST-PROCESSING • When using the
Page 283 and 284:
POST-PROCESSING 7. Create namelist
Page 285 and 286:
2. Add the location of the GrADS ex
Page 287 and 288:
POST-PROCESSING Column integrated c
Page 289 and 290:
POST-PROCESSING Direct soil evapora
Page 291 and 292:
POST-PROCESSING • Animation Contr
Page 293 and 294:
POST-PROCESSING For example, if the
Page 295 and 296:
5. Read the VAPOR Documentation POS
Page 297 and 298:
Table of Contents • Introduction
Page 299 and 300:
UTILITIES AND TOOLS -ts Generate ti
Page 301 and 302:
iowrf UTILITIES AND TOOLS This util
Page 303 and 304:
fields List of fields to process. d
Page 305 and 306:
&tc insert_bogus_storm = .true. rem
Page 307 and 308:
./v_interp wrfinput_d01 wrfinput_d0
Page 309 and 310:
Design WRF model domains WPS/util/p
Page 311 and 312:
GRIB data UTILITIES AND TOOLS ncrca
show all

WRF ARW User's Guide - MMM - UCAR

You also want an ePaper? Increase the reach of your titles

Delete template?

Save as template?