1 WRF Model Version 3.4 (April 6, 2012)
2 http://wrf-model.org/users/users.php
4 ------------------------
5 WRF PUBLIC DOMAIN NOTICE
6 ------------------------
8 WRF was developed at the National Center for Atmospheric Research
9 (NCAR) which is operated by the University Corporation for
10 Atmospheric Research (UCAR). NCAR and UCAR make no proprietary
11 claims, either statutory or otherwise, to this version and
12 release of WRF and consider WRF to be in the public domain for
13 use by any person or entity for any purpose without any fee or
14 charge. UCAR requests that any WRF user include this notice on
15 any partial or full copies of WRF. WRF is provided on an "AS
16 IS" basis and any warranties, either express or implied,
17 including but not limited to implied warranties of
18 non-infringement, originality, merchantability and fitness for a
19 particular purpose, are disclaimed. In no event shall
20 UCAR be liable for any damages, whatsoever, whether direct,
21 indirect, consequential or special, that arise out of or in
22 connection with the access, use or performance of WRF, including
26 ======================================
27 This is the main directory for the WRF Version 3 source code release.
28 ======================================
33 Version 3.4 is released on April 6, 2012 (rev xxxx).
35 - For more information on WRF V3.4 release, visit WRF User's home pages
36 http://www.mmm.ucar.edu/wrf/users/, and
37 http://www.dtcenter.org/wrf-nmm/users/, and read the online User's Guide.
39 ======================================
41 V3.3.1 Release Notes (9/16/11) (rev 5130):
44 This is a bug fix release. The detailed updates for WRF-ARW can be found at
45 http://www.mmm.ucar.edu/wrf/users/wrfv3.3/updates-3.3.1.html,
47 http://www.dtcenter.org/wrf-nmm/users/model/wrfv3/updates.php
49 ======================================
54 Version 3.3 is released on April 6, 2011 (rev 4896).
56 - For more information on WRF V3.3 release, visit WRF User's home pages
57 http://www.mmm.ucar.edu/wrf/users/, and
58 http://www.dtcenter.org/wrf-nmm/users/, and read the online User's Guide.
61 ======================================
63 V3.2.1 Release Notes (8/18/10):
66 This is a bug fix release. The detailed updates for WRF-ARW can be found at
67 http://www.mmm.ucar.edu/wrf/users/wrfv3.2/updates-3.2.1.html, and
69 http://www.dtcenter.org/wrf-nmm/users/model/wrfv3/updates.php
71 See online User's Guides for latest information.
73 ======================================
78 Version 3.2 is released on March 31, 2010.
80 - For more information on WRF V3.2 release, visit WRF User's home pages
81 http://www.mmm.ucar.edu/wrf/users/, and
82 http://www.dtcenter.org/wrf-nmm/users/, and read the online User's Guide.
85 ======================================
87 V3.1.1 Release Notes (7/31/09):
90 This is a bug fix release. The detailed updates for WRF-ARW can be found at
91 http://www.mmm.ucar.edu/wrf/users/wrfv3.1/updates-3.1.1.html, and
93 http://www.dtcenter.org/wrf-nmm/users/model/wrfv3/updates.php
95 See online User's Guides for latest information.
97 ======================================
102 Version 3.1 is released on April 9, 2009.
104 - For more information on WRF V3.1 release, visit WRF Users home page
105 http://www.mmm.ucar.edu/wrf/users/, and read the online User's Guide.
106 - WRF V3 executable will work with V3.0 wrfinput/wrfbdy (but requires
107 inserting a new namelist variable use_baseparam_fr_nml in &dynamics). As
108 always, rerunning the new programs is recommended.
109 - WRF V3.1 has changed a number of namelists. For example, ucmcall has
110 become sf_urban_physics, pd_moist(scalar/tke/chem) has become
111 moist_adv_opt (scalar/tke/chem_adv_opt). Helpful messages will be printed
115 V3.0.1.1 Release Notes:
116 -----------------------
118 Version 3.0.1.1 has only limited bug fixes compared to version 3.0.1.
119 The detailed updates for WRF-ARW can be found at
120 http://www.mmm.ucar.edu/wrf/users/wrfv3/updates-3.0.1.1.html.
123 V3.0.1 Release Notes:
124 ---------------------
126 This is a bug fix release. The detailed updates for WRF-ARW can be found at
127 http://www.mmm.ucar.edu/wrf/users/wrfv3/updates-3.0.1.html.
129 Online User's Guides have also been updated.
131 ======================================
136 - For directions on compiling WRF, see below or Users Web page.
137 - For more information on WRF V3 release, visit WRF Users home page
138 http://www.mmm.ucar.edu/wrf/users/
139 - WRF V3 works with WPS, and SI is no longer supported.
140 Please see User' Guide for WPS.
141 - WRF V3 executable does not work with wrfinput/wrfbdy produced by previous versions.
142 - WRF V3 has removed one obsolete namelist variable, dyn_opt. Edit with caution.
144 ======================================
148 - V2.0.1: May 21, 2004
149 - V2.0.2: June 3, 2004
150 - V2.0.3: Nov 12, 2004
151 V2.0.3.1: Dec 3, 2004
152 - V2.1: August 4, 2005
153 - V2.1.1: Nov 8, 2005
154 - V2.1.2: Jan 27, 2006
156 - V2.2.1: Nov 1, 2007
157 - V3.0: April 4, 2008
158 - V3.0.1: August 5, 2008
159 - V3.0.1.1: August 22, 2008
160 - V3.1: April 9, 2009
161 - V3.1.1: July 31, 2009
162 - V3.2: March 31, 2010
163 - V3.2.1: August 18, 2010
164 - V3.3: April 6, 2011
165 - V3.3.1: Sept 16, 2011
167 ======================================
169 How to compile and run?
170 -----------------------
172 - In WRFV3 directory, type 'configure' - this will create a configure.wrf
173 file that has appropriate compile options for the supported computers.
175 Note: WRF requires netCDF library. If your netCDF library is installed in
176 some odd directory, set environment variable NETCDF before you type
177 'configure'. For example,
179 setenv NETCDF /usr/local/netcdf-pgi
181 - Type 'compile case_name' where you can find the case_names by simply typing
182 compile. The following are available:
186 compile em_heldsuarez
189 compile em_quarter_ss
191 compile em_seabreeze2d_x
192 compile em_squall2d_x
193 compile em_squall2d_y
195 compile em_tropical_cyclone
197 Notes: 1. If you are going to create model output file that is more than 2Gb,
198 you should consider using netCDF large file support function. To activate
199 this, one must set the environment variable WRFIO_NCD_LARGE_FILE_SUPPORT.
200 In c-shell environment, do
202 setenv WRFIO_NCD_LARGE_FILE_SUPPORT 1
204 2. Since V3.2, we support using multiple processors for compilation. The
205 default number of processors used is 2. But if you have any problem with
206 compilation, please try using one processor to compile. To do this, set
207 the following environment variable before compile:
211 - If sucessful, this will create either real.exe or ideal.exe and wrf.exe
212 in directory main/, and the appropriate executables will be linked into
213 the test directoires under test/case_name, or run/.
215 - cd to the appropriate test or run directory to run ideal/real/wrf.
217 - If it is one of the idealized cases (b_wave, hill2d_x, grav2d_x, quarter_ss,
218 squall2d_x, squall2d_y, em_les or em_heldsuarez), cd the the appropriate directory, type
222 to produce wrfinput_d01 file for wrf model. Then type
228 - If it is real-data case (real), place files from WPS (met_em.*)
229 in the appropriate directory, type
233 to produce wrfbdy_d01 and wrfinput_d01. Then type
239 - If you use mpich, type
241 mpirun -np number-of-processors wrf.exe
243 - For information on how to make nested runs, visit
244 http://www.mmm.ucar.edu/wrf/users/
247 ======================================
251 - Advanced Research WRF (ARW) solver: Eulerian mass, hydrostatic and non-hydrostatic
252 * Arakawa C-grid staggering
253 * Runge-Kutta 2nd and 3rd order timestep options
254 * scalar-conserving flux form for prognostic variables
255 * 2nd to 6th order advection options (horizontal and vertical)
256 * time-split small step for acoustic modes
257 * small step horizontally explicit, vertically implicit
258 * divergence damping option and vertical time off-centering
259 * external-mode filtering option for mass model
260 * hydrostatic option via namelist option
261 * positive-definite and monotonic advection for moisture, scalar, tke and chemical tracers
262 * global modeling capability on latitude-longitude grid
263 * digital filter initialization
266 * multiple domains and multiple nest levels
267 * supports integer nest grid ratio
268 * feedback option for both odd and even nest grid ratios
275 * Automatic move using a mid-level vortex-following algorithm
278 * microphysics (Kessler/ WRF Single Moment 3, 5 and 6 classes / Lin et al./ Mibrandt 2-moment /
279 Eta Ferrier / Thompson / Goddard / 2-moment Morrison / WRF Double Moment 5 and 6 classes /
280 SBU-Lin 5-classes / NSSL 2-moment )
281 * cumulus parameterization (Kain-Fritsch with shallow convection /
282 Betts-Miller-Janjic / Grell-Devenyi ensemble / New Grell (with shallow convection option) /
283 Tiedtke (with shallow conv and momentum transport) / NSAS (with shallow conv and momentum transport) /
284 SAS (with shallow conv for ARW) / Zhang-McFarlane (with momentum transport) )
285 * UW shallow convection
286 * planetary boundary layer (Yosei University / Mellor-Yamada-Janjic / ACM2 / QNSE-EDMF / MYNN /
288 * slab soil model (5-layer thermal diffusion / Noah land-surface model (4 levels) /
289 RUC LSM (6 levels) / Pleim-Xu (2 levels / Noah-MP (4 levels) / SSiB (3 levels) )
290 * Urban canopy model, BEP multi-layer and BEM (works with Noah LSM, BEP and
291 BEM also requires MYJ or BouLac)
292 * longwave radiation (RRTM / CAM / RRTMG / new Goddard / FLG )
293 * shortwave radiation (Dudhia / old Goddard / CAM / RRTMG / new Goddard / FLG ),
294 terrain slope and shading effect
295 * sub-grid turbulence (constant K diffusion/ 2-D Smagorinsky/ predicted TKE /
296 2-D, 6th order diffusion / Nonlinear Backscatter Anisotropic (NBA) sub-grid turbulence stress for LES )
297 * Rayleigh damping for w at the upper boundary layer
299 * land-use categories determine surface properties; support for 24 category USGS and
300 20 category MODIS (Noah LSM only in V3.1)
301 * Options for modifying SST, sea ice, vegetation fraction, albedo, and deep soil temp
303 * fractional sea ice option for polar regions; modified snow/ice physics
304 * single-column ocean mixed layer model
305 * drag and enthalpy flux formulation for hurricane applications
308 * three-dimensional and surface analysis nudging
309 * observation nudging
314 * Hierarchical software architecture that insulates scientific code
315 (Model Layer) from computer architecture (Driver Layer)
316 * Multi-level parallelism supporting shared-memory (OpenMP), distributed-memory (MPI),
317 and hybrid share/distributed modes of execution
318 * Active data registry: defines and manages model state fields, I/O,
319 nesting, configuration, and numerous other aspects of WRF through a single file,
322 Easy to extend: forcing and feedback of new fields specified by
323 editing a single table in the Registry
324 Efficient: 5-8% overhead on 64 processes of IBM
326 * Enhanced I/O options:
327 NetCDF and Parallel HDF5 formats
328 Nine auxiliary input and history output streams separately controllable through the namelist
329 Special input streams for analysis and observation nudging
330 Output file names and time-stamps specifiable through namelist
331 Special output stream for 3DVAR
332 * Efficient execution on a range of computing platforms:
333 IBM SP systems, (e.g. NCAR "bluevista","blueice","bluefire" Power5-based system)
337 IA64 MPP (HP Superdome, SGI Altix, NCSA Teragrid systems)
339 x86_64 (e.g. TACC's "Ranger", NOAA/GSD "wJet" )
340 PGI, Intel, Pathscale, gfortran, g95 compilers supported
341 Sun Solaris (single threaded and SMP)
342 Cray X1, X1e (vector), XT3/4 (Opteron)
343 Mac Intel/ppc, PGI/ifort/g95
347 * RSL_LITE: communication layer, scalable to very large domains, supports nesting.
348 * I/O: NetCDF, parallel NetCDF (Argonne), HDF5, GRIB, raw binary, Quilting (asynchronous I/O), MCEL (coupling)
349 * ESMF Time Management, including exact arithmetic for fractional
350 time steps (no drift).
351 * ESMF integration - WRF can be run as an ESMF component.
352 * Improved documentation, both on-line (web based browsing tools) and in-line