1 WRF Model Version 4.6.0
3 https://www2.mmm.ucar.edu/wrf/users/
5 ------------------------
6 WRF PUBLIC DOMAIN NOTICE
7 ------------------------
9 WRF was developed at the National Center for Atmospheric Research
10 (NCAR) which is operated by the University Corporation for
11 Atmospheric Research (UCAR). NCAR and UCAR make no proprietary
12 claims, either statutory or otherwise, to this version and
13 release of WRF and consider WRF to be in the public domain for
14 use by any person or entity for any purpose without any fee or
15 charge. UCAR requests that any WRF user include this notice on
16 any partial or full copies of WRF. WRF is provided on an "AS
17 IS" basis and any warranties, either express or implied,
18 including but not limited to implied warranties of
19 non-infringement, originality, merchantability and fitness for a
20 particular purpose, are disclaimed. In no event shall
21 UCAR be liable for any damages, whatsoever, whether direct,
22 indirect, consequential or special, that arise out of or in
23 connection with the access, use or performance of WRF, including
27 ======================================
28 This is the main directory for the WRF Version 4 source code release.
29 ======================================
31 Other README files are located in the WRF/doc directory:
32 doc/README.cmake_build
37 doc/README.hybrid_vert_coord
46 doc/README.windturbine
49 - Beginning with version 4.0, for more information on the releases, visit
50 the WRF GitHub Release Page:
51 https://github.com/wrf-model/WRF/releases
55 V3.9.1.1 Release Notes (8/28/17):
58 - Version 3.9.1.1 has only limited bug fixes compared to version 3.9.1.
59 For more information on WRF V3.9.1.1 release, visit WRF User's home pages
60 http://www2.mmm.ucar.edu/wrf/users/, and
61 http://www.dtcenter.org/wrf-nmm/users/, and read the online User's Guide.
64 V3.9.1 Release Notes (8/17/17):
67 - For more information on WRF V3.9.1 release, visit WRF User's home pages
68 http://www2.mmm.ucar.edu/wrf/users/, and
69 http://www.dtcenter.org/wrf-nmm/users/, and read the online User's Guide.
72 V3.9 Release Notes (4/17/17):
75 - For more information on WRF V3.9 release, visit WRF User's home pages
76 http://www2.mmm.ucar.edu/wrf/users/, and
77 http://www.dtcenter.org/wrf-nmm/users/, and read the online User's Guide.
80 V3.8.1 Release Notes (8/12/16) (rev 9553):
83 - For more information on WRF V3.8.1 release, visit WRF User's home pages
84 http://www2.mmm.ucar.edu/wrf/users/, and
85 read the online User's Guide.
87 V3.8 Release Notes (4/8/16) (rev 9345):
90 - For more information on WRF V3.8 release, visit WRF User's home pages
91 http://www2.mmm.ucar.edu/wrf/users/, and
92 http://www.dtcenter.org/wrf-nmm/users/, and read the online User's Guide.
94 V3.7.1 Release Notes (8/14/15) (rev 8584):
97 - For more information on WRF V3.7.1 release, visit WRF User's home pages
98 http://www2.mmm.ucar.edu/wrf/users/
100 V3.7 Release Notes (4/17/15) (rev 8345):
103 - For more information on WRF V3.7 release, visit WRF User's home pages
104 http://www2.mmm.ucar.edu/wrf/users/, and
105 http://www.dtcenter.org/wrf-nmm/users/, and read the online User's Guide.
107 V3.6.1 Release Notes (8/14/14) (rev 7630):
110 - For more information on WRF V3.6.1 release, visit WRF User's home pages
111 http://www2.mmm.ucar.edu/wrf/users/, and
112 http://www.dtcenter.org/wrf-nmm/users/, and read the online User's Guide.
114 V3.6 Release Notes (4/18/14) (rev 7412):
117 - For more information on WRF V3.6 release, visit WRF User's home pages
118 http://www2.mmm.ucar.edu/wrf/users/, and
119 http://www.dtcenter.org/wrf-nmm/users/, and read the online User's Guide.
121 ======================================
123 V3.5.1 Release Notes (9/23/13) (rev 6868):
126 - For more information on WRF V3.5.1 release, visit WRF User's home pages
127 http://www2.mmm.ucar.edu/wrf/users/, and
128 http://www.dtcenter.org/wrf-nmm/users/, and read the online User's Guide.
130 ======================================
132 V3.5 Release Notes (4/18/13) (rev 6660):
135 - For more information on WRF V3.5 release, visit WRF User's home pages
136 http://www2.mmm.ucar.edu/wrf/users/, and
137 http://www.dtcenter.org/wrf-nmm/users/, and read the online User's Guide.
139 ======================================
141 V3.4.1 Release Notes (8/16/12) (rev 5930):
144 This is a bug fix release. The detailed updates for WRF-ARW can be found at
145 http://www2.mmm.ucar.edu/wrf/users/wrfv3.4/updates-3.4.1.html,
147 http://www.dtcenter.org/wrf-nmm/users/model/wrfv3/updates.php
149 ======================================
154 Version 3.4 is released on April 6, 2012 (rev 5745).
156 - For more information on WRF V3.4 release, visit WRF User's home pages
157 http://www2.mmm.ucar.edu/wrf/users/, and
158 http://www.dtcenter.org/wrf-nmm/users/, and read the online User's Guide.
160 ======================================
162 V3.3.1 Release Notes (9/16/11) (rev 5130):
165 This is a bug fix release. The detailed updates for WRF-ARW can be found at
166 http://www2.mmm.ucar.edu/wrf/users/wrfv3.3/updates-3.3.1.html,
168 http://www.dtcenter.org/wrf-nmm/users/model/wrfv3/updates.php
170 ======================================
175 Version 3.3 is released on April 6, 2011 (rev 4896).
177 - For more information on WRF V3.3 release, visit WRF User's home pages
178 http://www2.mmm.ucar.edu/wrf/users/, and
179 http://www.dtcenter.org/wrf-nmm/users/, and read the online User's Guide.
182 ======================================
184 V3.2.1 Release Notes (8/18/10):
187 This is a bug fix release. The detailed updates for WRF-ARW can be found at
188 http://www2.mmm.ucar.edu/wrf/users/wrfv3.2/updates-3.2.1.html, and
190 http://www.dtcenter.org/wrf-nmm/users/model/wrfv3/updates.php
192 See online User's Guides for latest information.
194 ======================================
199 Version 3.2 is released on March 31, 2010.
201 - For more information on WRF V3.2 release, visit WRF User's home pages
202 http://www2.mmm.ucar.edu/wrf/users/, and
203 http://www.dtcenter.org/wrf-nmm/users/, and read the online User's Guide.
206 ======================================
208 V3.1.1 Release Notes (7/31/09):
211 This is a bug fix release. The detailed updates for WRF-ARW can be found at
212 http://www2.mmm.ucar.edu/wrf/users/wrfv3.1/updates-3.1.1.html, and
214 http://www.dtcenter.org/wrf-nmm/users/model/wrfv3/updates.php
216 See online User's Guides for latest information.
218 ======================================
223 Version 3.1 is released on April 9, 2009.
225 - For more information on WRF V3.1 release, visit WRF Users home page
226 http://www2.mmm.ucar.edu/wrf/users/, and read the online User's Guide.
227 - WRF V3 executable will work with V3.0 wrfinput/wrfbdy (but requires
228 inserting a new namelist variable use_baseparam_fr_nml in &dynamics). As
229 always, rerunning the new programs is recommended.
230 - WRF V3.1 has changed a number of namelists. For example, ucmcall has
231 become sf_urban_physics, pd_moist(scalar/tke/chem) has become
232 moist_adv_opt (scalar/tke/chem_adv_opt). Helpful messages will be printed
236 V3.0.1.1 Release Notes:
237 -----------------------
239 Version 3.0.1.1 has only limited bug fixes compared to version 3.0.1.
240 The detailed updates for WRF-ARW can be found at
241 http://www2.mmm.ucar.edu/wrf/users/wrfv3/updates-3.0.1.1.html.
244 V3.0.1 Release Notes:
245 ---------------------
247 This is a bug fix release. The detailed updates for WRF-ARW can be found at
248 http://www2.mmm.ucar.edu/wrf/users/wrfv3/updates-3.0.1.html.
250 Online User's Guides have also been updated.
252 ======================================
257 - For directions on compiling WRF, see below or Users Web page.
258 - For more information on WRF V3 release, visit WRF Users home page
259 http://www2.mmm.ucar.edu/wrf/users/
260 - WRF V3 works with WPS, and SI is no longer supported.
261 Please see User' Guide for WPS.
262 - WRF V3 executable does not work with wrfinput/wrfbdy produced by previous versions.
263 - WRF V3 has removed one obsolete namelist variable, dyn_opt. Edit with caution.
265 ======================================
269 - V2.0.1: May 21, 2004
270 - V2.0.2: June 3, 2004
271 - V2.0.3: Nov 12, 2004
272 V2.0.3.1: Dec 3, 2004
273 - V2.1: August 4, 2005
274 - V2.1.1: Nov 8, 2005
275 - V2.1.2: Jan 27, 2006
277 - V2.2.1: Nov 1, 2007
278 - V3.0: April 4, 2008
279 - V3.0.1: August 5, 2008
280 - V3.0.1.1: August 22, 2008
281 - V3.1: April 9, 2009
282 - V3.1.1: July 31, 2009
283 - V3.2: March 31, 2010
284 - V3.2.1: August 18, 2010
285 - V3.3: April 6, 2011
286 - V3.3.1: Sept 16, 2011
287 - V3.4: April 6, 2012
288 - V3.4.1: Aug 16, 2012
289 - V3.5: April 18, 2013
290 - V3.5.1: Sept 23, 2013
291 - V3.6: April 18, 2014
292 - V3.6.1: Aug 14, 2014
293 - V3.7: April 20, 2015
294 - V3.7.1: Aug 14, 2015
295 - V3.8: April 8, 2016
296 - V3.8.1: Aug 12, 2016
298 - V3.9.1: Aug 17, 2017
299 - V3.9.1.1: Aug 28, 2017
302 ======================================
304 How to compile and run?
305 -----------------------
307 - In WRF directory, type 'configure' - this will create a configure.wrf
308 file that has appropriate compile options for the supported computers.
310 Note: WRF requires netCDF library. If your netCDF library is installed in
311 some odd directory, set environment variable NETCDF before you type
312 'configure'. For example,
314 setenv NETCDF /usr/local/netcdf-pgi
316 - Type 'compile case_name' where you can find the case_names by simply typing
317 compile. The following are available:
321 compile em_heldsuarez
324 compile em_quarter_ss
326 compile em_seabreeze2d_x
328 compile em_squall2d_x
329 compile em_squall2d_y
331 compile em_tropical_cyclone
333 Notes: 1. If you are going to create model output file that is more than 2Gb,
334 you should consider using netCDF large file support function. To activate
335 this, one must set the environment variable WRFIO_NCD_LARGE_FILE_SUPPORT.
336 In c-shell environment, do
338 setenv WRFIO_NCD_LARGE_FILE_SUPPORT 1
340 This becomes default since V3.9.
342 2. Since V3.2, we support using multiple processors for compilation. The
343 default number of processors used is 2. But if you have any problem with
344 compilation, please try using one processor to compile. To do this, set
345 the following environment variable before compile:
349 - If sucessful, this will create either real.exe or ideal.exe and wrf.exe
350 in directory main/, and the appropriate executables will be linked into
351 the test directoires under test/case_name, or run/.
353 - cd to the appropriate test or run directory to run ideal/real/wrf.
355 - If it is one of the idealized cases (b_wave, hill2d_x, grav2d_x, quarter_ss,
356 squall2d_x, squall2d_y, em_les or em_heldsuarez), cd the the appropriate directory, type
360 to produce wrfinput_d01 file for wrf model. Then type
366 - If it is real-data case (real), place files from WPS (met_em.*)
367 in the appropriate directory, type
371 to produce wrfbdy_d01 and wrfinput_d01. Then type
377 - If you use mpich, type
379 mpirun -np number-of-processors wrf.exe
381 - For information on how to make nested runs, visit
382 http://www2.mmm.ucar.edu/wrf/users/
385 ======================================
389 - Advanced Research WRF (ARW) solver: Eulerian mass, hydrostatic and non-hydrostatic
390 * Arakawa C-grid staggering
391 * Runge-Kutta 2nd and 3rd order timestep options
392 * scalar-conserving flux form for prognostic variables
393 * 2nd to 6th order advection options (horizontal and vertical)
394 * time-split small step for acoustic modes
395 * small step horizontally explicit, vertically implicit
396 * divergence damping option and vertical time off-centering
397 * external-mode filtering option for mass model
398 * hydrostatic option via namelist option
399 * positive-definite and monotonic advection for moisture, scalar, tke and chemical tracers
400 * global modeling capability on latitude-longitude grid
401 * digital filter initialization
402 * WENO advection options
403 * Hybrid sigma-pressure vertical coordinate (since V3.9)
406 * multiple domains and multiple nest levels
407 * supports integer nest grid ratio
408 * feedback option for both odd and even nest grid ratios
415 * Automatic move using a mid-level vortex-following algorithm
418 * microphysics (Kessler/ WRF Single Moment 3, 5 and 6 classes / Lin et al./ Mibrandt 2-moment /
419 Eta Ferrier / Thompson / Goddard / 2-moment Morrison / WRF Double Moment 5 and 6 classes /
420 SBU-Lin 5-classes / NSSL 2-moment and 1-moment / CAM 5.1 ) / Thompson aerosol-aware /
421 HUJI full and fast SBM / P3 / 2-moment Morrison with CESM aerosol
422 * cumulus parameterization (Kain-Fritsch with shallow convection /
423 Betts-Miller-Janjic / Grell-Devenyi ensemble / Grell 3D (with shallow convection option) /
424 Grell-Freitas ensemble /
425 Tiedtke (with shallow conv and momentum transport) / NSAS (with shallow conv and momentum transport) /
426 SAS (with shallow conv for ARW) / Zhang-McFarlane (with momentum transport) ) /
427 New Tiedtke (with shallow conv and momentum transport) / Multi-scale KF (with shallow convection) /
428 Kain-Fritsch Cumulus Potential (with shallow convection)
429 * UW shallow convection / GRIMS shallow convection
430 * planetary boundary layer (Yosei University / Mellor-Yamada-Janjic / ACM2 / QNSE-EDMF / MYNN /
431 BouLac / UW / TEMF / Grenier-Bretherton-McCaa ) / Shin-Hong
432 * slab soil model (5-layer thermal diffusion / Noah land-surface model (4 levels) /
433 RUC LSM (6 levels) / Pleim-Xu (2 levels / Noah-MP (4 levels) / SSiB (3 levels) / CLM4 (10 levels) )
434 * Urban canopy model, BEP multi-layer and BEM (works with Noah LSM, BEP and
435 BEM also requires MYJ or BouLac)
436 * longwave radiation (RRTM / CAM / RRTMG / new Goddard / FLG )
437 * shortwave radiation (Dudhia / old Goddard / CAM / RRTMG / new Goddard / FLG ),
438 terrain slope and shading effect
439 * sub-grid turbulence (constant K diffusion/ 2-D Smagorinsky/ predicted TKE /
440 2-D, 6th order diffusion / Nonlinear Backscatter Anisotropic (NBA) sub-grid turbulence stress for LES )
441 * Rayleigh damping for w at the upper boundary layer
442 * gravity wave drag (including flow blocking)
443 * land-use categories determine surface properties; support for 24 category USGS and
445 * Options for modifying SST, sea ice, vegetation fraction, albedo, and deep soil temp
447 * fractional sea ice option for polar regions; modified snow/ice physics
448 * single-column ocean mixed layer model / 3D Price-Weller-Pinkel (PWP) ocean model
449 * drag and enthalpy flux formulation for hurricane applications
454 * three-dimensional, surface analysis nudging, and flux-adjusting surface data nudging
455 * observation nudging
457 * flux-adjusting surface data nudging
461 * Hierarchical software architecture that insulates scientific code
462 (Model Layer) from computer architecture (Driver Layer)
463 * Multi-level parallelism supporting shared-memory (OpenMP), distributed-memory (MPI),
464 and hybrid share/distributed modes of execution
465 * Active data registry: defines and manages model state fields, I/O,
466 nesting, configuration, and numerous other aspects of WRF through a single file,
469 Easy to extend: forcing and feedback of new fields specified by
470 editing a single table in the Registry
471 Efficient: 5-8% overhead on 64 processes of IBM
473 * Enhanced I/O options:
474 NetCDF and Parallel HDF5 formats
475 Nine auxiliary input and history output streams separately controllable through the namelist
476 Special input streams for analysis and observation nudging
477 Output file names and time-stamps specifiable through namelist
478 Special output stream for 3DVAR
479 * Efficient execution on a range of computing platforms:
480 IBM SP systems, (e.g. NCAR "bluevista","blueice","bluefire" Power5-based system)
484 IA64 MPP (HP Superdome, SGI Altix, NCSA Teragrid systems)
486 x86_64 (e.g. TACC's "Ranger", NOAA/GSD "wJet" )
487 PGI, Intel, Pathscale, gfortran, g95 compilers supported
488 Sun Solaris (single threaded and SMP)
489 Cray X1, X1e (vector), XT3/4 (Opteron)
490 Mac Intel/ppc, PGI/ifort/g95
493 Fujitsu VPP 5000, FX10
495 * RSL_LITE: communication layer, scalable to very large domains, supports nesting.
496 * I/O: NetCDF, parallel NetCDF (Argonne), HDF5, GRIB, raw binary, Quilting (asynchronous I/O), MCEL (coupling)
497 * ESMF Time Management, including exact arithmetic for fractional
498 time steps (no drift).
499 * ESMF integration - WRF can be run as an ESMF component.
500 * Improved documentation, both on-line (web based browsing tools) and in-line