1 WRF Model Version 4.4.2
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:
36 doc/README.hybrid_vert_coord
45 doc/README.windturbine
48 - Beginning with version 4.0, for more information on the releases, visit
49 the WRF GitHub Release Page:
50 https://github.com/wrf-model/WRF/releases
54 V3.9.1.1 Release Notes (8/28/17):
57 - Version 3.9.1.1 has only limited bug fixes compared to version 3.9.1.
58 For more information on WRF V3.9.1.1 release, visit WRF User's home pages
59 http://www2.mmm.ucar.edu/wrf/users/, and
60 http://www.dtcenter.org/wrf-nmm/users/, and read the online User's Guide.
63 V3.9.1 Release Notes (8/17/17):
66 - For more information on WRF V3.9.1 release, visit WRF User's home pages
67 http://www2.mmm.ucar.edu/wrf/users/, and
68 http://www.dtcenter.org/wrf-nmm/users/, and read the online User's Guide.
71 V3.9 Release Notes (4/17/17):
74 - For more information on WRF V3.9 release, visit WRF User's home pages
75 http://www2.mmm.ucar.edu/wrf/users/, and
76 http://www.dtcenter.org/wrf-nmm/users/, and read the online User's Guide.
79 V3.8.1 Release Notes (8/12/16) (rev 9553):
82 - For more information on WRF V3.8.1 release, visit WRF User's home pages
83 http://www2.mmm.ucar.edu/wrf/users/, and
84 read the online User's Guide.
86 V3.8 Release Notes (4/8/16) (rev 9345):
89 - For more information on WRF V3.8 release, visit WRF User's home pages
90 http://www2.mmm.ucar.edu/wrf/users/, and
91 http://www.dtcenter.org/wrf-nmm/users/, and read the online User's Guide.
93 V3.7.1 Release Notes (8/14/15) (rev 8584):
96 - For more information on WRF V3.7.1 release, visit WRF User's home pages
97 http://www2.mmm.ucar.edu/wrf/users/
99 V3.7 Release Notes (4/17/15) (rev 8345):
102 - For more information on WRF V3.7 release, visit WRF User's home pages
103 http://www2.mmm.ucar.edu/wrf/users/, and
104 http://www.dtcenter.org/wrf-nmm/users/, and read the online User's Guide.
106 V3.6.1 Release Notes (8/14/14) (rev 7630):
109 - For more information on WRF V3.6.1 release, visit WRF User's home pages
110 http://www2.mmm.ucar.edu/wrf/users/, and
111 http://www.dtcenter.org/wrf-nmm/users/, and read the online User's Guide.
113 V3.6 Release Notes (4/18/14) (rev 7412):
116 - For more information on WRF V3.6 release, visit WRF User's home pages
117 http://www2.mmm.ucar.edu/wrf/users/, and
118 http://www.dtcenter.org/wrf-nmm/users/, and read the online User's Guide.
120 ======================================
122 V3.5.1 Release Notes (9/23/13) (rev 6868):
125 - For more information on WRF V3.5.1 release, visit WRF User's home pages
126 http://www2.mmm.ucar.edu/wrf/users/, and
127 http://www.dtcenter.org/wrf-nmm/users/, and read the online User's Guide.
129 ======================================
131 V3.5 Release Notes (4/18/13) (rev 6660):
134 - For more information on WRF V3.5 release, visit WRF User's home pages
135 http://www2.mmm.ucar.edu/wrf/users/, and
136 http://www.dtcenter.org/wrf-nmm/users/, and read the online User's Guide.
138 ======================================
140 V3.4.1 Release Notes (8/16/12) (rev 5930):
143 This is a bug fix release. The detailed updates for WRF-ARW can be found at
144 http://www2.mmm.ucar.edu/wrf/users/wrfv3.4/updates-3.4.1.html,
146 http://www.dtcenter.org/wrf-nmm/users/model/wrfv3/updates.php
148 ======================================
153 Version 3.4 is released on April 6, 2012 (rev 5745).
155 - For more information on WRF V3.4 release, visit WRF User's home pages
156 http://www2.mmm.ucar.edu/wrf/users/, and
157 http://www.dtcenter.org/wrf-nmm/users/, and read the online User's Guide.
159 ======================================
161 V3.3.1 Release Notes (9/16/11) (rev 5130):
164 This is a bug fix release. The detailed updates for WRF-ARW can be found at
165 http://www2.mmm.ucar.edu/wrf/users/wrfv3.3/updates-3.3.1.html,
167 http://www.dtcenter.org/wrf-nmm/users/model/wrfv3/updates.php
169 ======================================
174 Version 3.3 is released on April 6, 2011 (rev 4896).
176 - For more information on WRF V3.3 release, visit WRF User's home pages
177 http://www2.mmm.ucar.edu/wrf/users/, and
178 http://www.dtcenter.org/wrf-nmm/users/, and read the online User's Guide.
181 ======================================
183 V3.2.1 Release Notes (8/18/10):
186 This is a bug fix release. The detailed updates for WRF-ARW can be found at
187 http://www2.mmm.ucar.edu/wrf/users/wrfv3.2/updates-3.2.1.html, and
189 http://www.dtcenter.org/wrf-nmm/users/model/wrfv3/updates.php
191 See online User's Guides for latest information.
193 ======================================
198 Version 3.2 is released on March 31, 2010.
200 - For more information on WRF V3.2 release, visit WRF User's home pages
201 http://www2.mmm.ucar.edu/wrf/users/, and
202 http://www.dtcenter.org/wrf-nmm/users/, and read the online User's Guide.
205 ======================================
207 V3.1.1 Release Notes (7/31/09):
210 This is a bug fix release. The detailed updates for WRF-ARW can be found at
211 http://www2.mmm.ucar.edu/wrf/users/wrfv3.1/updates-3.1.1.html, and
213 http://www.dtcenter.org/wrf-nmm/users/model/wrfv3/updates.php
215 See online User's Guides for latest information.
217 ======================================
222 Version 3.1 is released on April 9, 2009.
224 - For more information on WRF V3.1 release, visit WRF Users home page
225 http://www2.mmm.ucar.edu/wrf/users/, and read the online User's Guide.
226 - WRF V3 executable will work with V3.0 wrfinput/wrfbdy (but requires
227 inserting a new namelist variable use_baseparam_fr_nml in &dynamics). As
228 always, rerunning the new programs is recommended.
229 - WRF V3.1 has changed a number of namelists. For example, ucmcall has
230 become sf_urban_physics, pd_moist(scalar/tke/chem) has become
231 moist_adv_opt (scalar/tke/chem_adv_opt). Helpful messages will be printed
235 V3.0.1.1 Release Notes:
236 -----------------------
238 Version 3.0.1.1 has only limited bug fixes compared to version 3.0.1.
239 The detailed updates for WRF-ARW can be found at
240 http://www2.mmm.ucar.edu/wrf/users/wrfv3/updates-3.0.1.1.html.
243 V3.0.1 Release Notes:
244 ---------------------
246 This is a bug fix release. The detailed updates for WRF-ARW can be found at
247 http://www2.mmm.ucar.edu/wrf/users/wrfv3/updates-3.0.1.html.
249 Online User's Guides have also been updated.
251 ======================================
256 - For directions on compiling WRF, see below or Users Web page.
257 - For more information on WRF V3 release, visit WRF Users home page
258 http://www2.mmm.ucar.edu/wrf/users/
259 - WRF V3 works with WPS, and SI is no longer supported.
260 Please see User' Guide for WPS.
261 - WRF V3 executable does not work with wrfinput/wrfbdy produced by previous versions.
262 - WRF V3 has removed one obsolete namelist variable, dyn_opt. Edit with caution.
264 ======================================
268 - V2.0.1: May 21, 2004
269 - V2.0.2: June 3, 2004
270 - V2.0.3: Nov 12, 2004
271 V2.0.3.1: Dec 3, 2004
272 - V2.1: August 4, 2005
273 - V2.1.1: Nov 8, 2005
274 - V2.1.2: Jan 27, 2006
276 - V2.2.1: Nov 1, 2007
277 - V3.0: April 4, 2008
278 - V3.0.1: August 5, 2008
279 - V3.0.1.1: August 22, 2008
280 - V3.1: April 9, 2009
281 - V3.1.1: July 31, 2009
282 - V3.2: March 31, 2010
283 - V3.2.1: August 18, 2010
284 - V3.3: April 6, 2011
285 - V3.3.1: Sept 16, 2011
286 - V3.4: April 6, 2012
287 - V3.4.1: Aug 16, 2012
288 - V3.5: April 18, 2013
289 - V3.5.1: Sept 23, 2013
290 - V3.6: April 18, 2014
291 - V3.6.1: Aug 14, 2014
292 - V3.7: April 20, 2015
293 - V3.7.1: Aug 14, 2015
294 - V3.8: April 8, 2016
295 - V3.8.1: Aug 12, 2016
297 - V3.9.1: Aug 17, 2017
298 - V3.9.1.1: Aug 28, 2017
301 ======================================
303 How to compile and run?
304 -----------------------
306 - In WRF directory, type 'configure' - this will create a configure.wrf
307 file that has appropriate compile options for the supported computers.
309 Note: WRF requires netCDF library. If your netCDF library is installed in
310 some odd directory, set environment variable NETCDF before you type
311 'configure'. For example,
313 setenv NETCDF /usr/local/netcdf-pgi
315 - Type 'compile case_name' where you can find the case_names by simply typing
316 compile. The following are available:
320 compile em_heldsuarez
323 compile em_quarter_ss
325 compile em_seabreeze2d_x
327 compile em_squall2d_x
328 compile em_squall2d_y
330 compile em_tropical_cyclone
332 Notes: 1. If you are going to create model output file that is more than 2Gb,
333 you should consider using netCDF large file support function. To activate
334 this, one must set the environment variable WRFIO_NCD_LARGE_FILE_SUPPORT.
335 In c-shell environment, do
337 setenv WRFIO_NCD_LARGE_FILE_SUPPORT 1
339 This becomes default since V3.9.
341 2. Since V3.2, we support using multiple processors for compilation. The
342 default number of processors used is 2. But if you have any problem with
343 compilation, please try using one processor to compile. To do this, set
344 the following environment variable before compile:
348 - If sucessful, this will create either real.exe or ideal.exe and wrf.exe
349 in directory main/, and the appropriate executables will be linked into
350 the test directoires under test/case_name, or run/.
352 - cd to the appropriate test or run directory to run ideal/real/wrf.
354 - If it is one of the idealized cases (b_wave, hill2d_x, grav2d_x, quarter_ss,
355 squall2d_x, squall2d_y, em_les or em_heldsuarez), cd the the appropriate directory, type
359 to produce wrfinput_d01 file for wrf model. Then type
365 - If it is real-data case (real), place files from WPS (met_em.*)
366 in the appropriate directory, type
370 to produce wrfbdy_d01 and wrfinput_d01. Then type
376 - If you use mpich, type
378 mpirun -np number-of-processors wrf.exe
380 - For information on how to make nested runs, visit
381 http://www2.mmm.ucar.edu/wrf/users/
384 ======================================
388 - Advanced Research WRF (ARW) solver: Eulerian mass, hydrostatic and non-hydrostatic
389 * Arakawa C-grid staggering
390 * Runge-Kutta 2nd and 3rd order timestep options
391 * scalar-conserving flux form for prognostic variables
392 * 2nd to 6th order advection options (horizontal and vertical)
393 * time-split small step for acoustic modes
394 * small step horizontally explicit, vertically implicit
395 * divergence damping option and vertical time off-centering
396 * external-mode filtering option for mass model
397 * hydrostatic option via namelist option
398 * positive-definite and monotonic advection for moisture, scalar, tke and chemical tracers
399 * global modeling capability on latitude-longitude grid
400 * digital filter initialization
401 * WENO advection options
402 * Hybrid sigma-pressure vertical coordinate (since V3.9)
405 * multiple domains and multiple nest levels
406 * supports integer nest grid ratio
407 * feedback option for both odd and even nest grid ratios
414 * Automatic move using a mid-level vortex-following algorithm
417 * microphysics (Kessler/ WRF Single Moment 3, 5 and 6 classes / Lin et al./ Mibrandt 2-moment /
418 Eta Ferrier / Thompson / Goddard / 2-moment Morrison / WRF Double Moment 5 and 6 classes /
419 SBU-Lin 5-classes / NSSL 2-moment and 1-moment / CAM 5.1 ) / Thompson aerosol-aware /
420 HUJI full and fast SBM / P3 / 2-moment Morrison with CESM aerosol
421 * cumulus parameterization (Kain-Fritsch with shallow convection /
422 Betts-Miller-Janjic / Grell-Devenyi ensemble / Grell 3D (with shallow convection option) /
423 Grell-Freitas ensemble /
424 Tiedtke (with shallow conv and momentum transport) / NSAS (with shallow conv and momentum transport) /
425 SAS (with shallow conv for ARW) / Zhang-McFarlane (with momentum transport) ) /
426 New Tiedtke (with shallow conv and momentum transport) / Multi-scale KF (with shallow convection) /
427 Kain-Fritsch Cumulus Potential (with shallow convection)
428 * UW shallow convection / GRIMS shallow convection
429 * planetary boundary layer (Yosei University / Mellor-Yamada-Janjic / ACM2 / QNSE-EDMF / MYNN /
430 BouLac / UW / TEMF / Grenier-Bretherton-McCaa ) / Shin-Hong
431 * slab soil model (5-layer thermal diffusion / Noah land-surface model (4 levels) /
432 RUC LSM (6 levels) / Pleim-Xu (2 levels / Noah-MP (4 levels) / SSiB (3 levels) / CLM4 (10 levels) )
433 * Urban canopy model, BEP multi-layer and BEM (works with Noah LSM, BEP and
434 BEM also requires MYJ or BouLac)
435 * longwave radiation (RRTM / CAM / RRTMG / new Goddard / FLG )
436 * shortwave radiation (Dudhia / old Goddard / CAM / RRTMG / new Goddard / FLG ),
437 terrain slope and shading effect
438 * sub-grid turbulence (constant K diffusion/ 2-D Smagorinsky/ predicted TKE /
439 2-D, 6th order diffusion / Nonlinear Backscatter Anisotropic (NBA) sub-grid turbulence stress for LES )
440 * Rayleigh damping for w at the upper boundary layer
441 * gravity wave drag (including flow blocking)
442 * land-use categories determine surface properties; support for 24 category USGS and
444 * Options for modifying SST, sea ice, vegetation fraction, albedo, and deep soil temp
446 * fractional sea ice option for polar regions; modified snow/ice physics
447 * single-column ocean mixed layer model / 3D Price-Weller-Pinkel (PWP) ocean model
448 * drag and enthalpy flux formulation for hurricane applications
453 * three-dimensional, surface analysis nudging, and flux-adjusting surface data nudging
454 * observation nudging
456 * flux-adjusting surface data nudging
460 * Hierarchical software architecture that insulates scientific code
461 (Model Layer) from computer architecture (Driver Layer)
462 * Multi-level parallelism supporting shared-memory (OpenMP), distributed-memory (MPI),
463 and hybrid share/distributed modes of execution
464 * Active data registry: defines and manages model state fields, I/O,
465 nesting, configuration, and numerous other aspects of WRF through a single file,
468 Easy to extend: forcing and feedback of new fields specified by
469 editing a single table in the Registry
470 Efficient: 5-8% overhead on 64 processes of IBM
472 * Enhanced I/O options:
473 NetCDF and Parallel HDF5 formats
474 Nine auxiliary input and history output streams separately controllable through the namelist
475 Special input streams for analysis and observation nudging
476 Output file names and time-stamps specifiable through namelist
477 Special output stream for 3DVAR
478 * Efficient execution on a range of computing platforms:
479 IBM SP systems, (e.g. NCAR "bluevista","blueice","bluefire" Power5-based system)
483 IA64 MPP (HP Superdome, SGI Altix, NCSA Teragrid systems)
485 x86_64 (e.g. TACC's "Ranger", NOAA/GSD "wJet" )
486 PGI, Intel, Pathscale, gfortran, g95 compilers supported
487 Sun Solaris (single threaded and SMP)
488 Cray X1, X1e (vector), XT3/4 (Opteron)
489 Mac Intel/ppc, PGI/ifort/g95
492 Fujitsu VPP 5000, FX10
494 * RSL_LITE: communication layer, scalable to very large domains, supports nesting.
495 * I/O: NetCDF, parallel NetCDF (Argonne), HDF5, GRIB, raw binary, Quilting (asynchronous I/O), MCEL (coupling)
496 * ESMF Time Management, including exact arithmetic for fractional
497 time steps (no drift).
498 * ESMF integration - WRF can be run as an ESMF component.
499 * Improved documentation, both on-line (web based browsing tools) and in-line