Model:WRF: Difference between revisions

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|Email address=wrfhelp@ucar.edu
|Email address=wrfhelp@ucar.edu
|Phone=(303) 497-1000
|Phone=(303) 497-1000
|Provide key papers on model if any=The following papers describe the equations and numerical schemes used in the WRF ARW core:
# Klemp, J. B., W. C. Skamarock, and J. Dudhia, 2007: Conservative split-explicit time integration methods for the compressible nonhydrostatic equations. Mon. Wea. Rev.
# Skamarock, W. C., and J. B. Klemp, 2007: A time-split nonhydrostatic atmospheric model for research and NWP applications. J. Comp. Phys., special issue on environmental modeling.
#Skamarock, W. C., 2006: Positive-Definite and Montonic Limiters for Unrestricted-Timestep Transport Schemes. Mon. Wea. Rev., 134, 2241-2250.
# Skamarock, W. C., J. B. Klemp, J. Dudhia, D. O. Gill, D. M. Barker, W. Wang, and J. G. Powers, 2005: A description of the Advanced Research WRF Version 2. NCAR Tech Notes-468+STR.
# Skamarock, W. C., 2004: Evaluating Mesoscale NWP Models Using Kinetic Energy Spectra. Mon. Wea., Rev., 132, 3019-3032.
# Wicker, L. J., and W. C. Skamarock, 2002: Time splitting methods for elastic models using forward time schemes (pdf file). Mon. Wea. Rev., 130, 2088-2097.
}}
}}
{{Model identity
{{Model identity
|Model type=Modular
|Model type=Modular
|Categories=Terrestrial
|Categories=Climate
|Spatial dimensions=3D
|Spatial dimensions=3D
|Spatialscale=Global, Continental, Regional-Scale, Landscape-Scale, Watershed-Scale
|Spatialscale=Global, Continental, Regional-Scale, Landscape-Scale, Watershed-Scale
|One-line model description=Weather Research and Forecasting Model
|One-line model description=Weather Research and Forecasting Model
|Extended model description=The Weather Research and Forecasting (WRF) Model is a next-generation mesoscale numerical weather prediction system designed to serve both operational forecasting and atmospheric research needs. It features multiple dynamical cores, a 3-dimensional variational (3DVAR) data assimilation system, and a software architecture allowing for computational parallelism and system extensibility. WRF is suitable for a broad spectrum of applications across scales ranging from meters to thousands of kilometers.
|Extended model description=The Weather Research and Forecasting (WRF) Model is a next-generation mesoscale numerical weather prediction system designed to serve both operational forecasting and atmospheric research needs. It features multiple dynamical cores, a 3-dimensional variational (3DVAR) data assimilation system, and a software architecture allowing for computational parallelism and system extensibility. WRF is suitable for a broad spectrum of applications across scales ranging from meters to thousands of kilometers.
|Provide key papers on model if any=The following papers describe the equations and numerical schemes used in the WRF ARW core:
# Klemp, J. B., W. C. Skamarock, and J. Dudhia, 2007: Conservative split-explicit time integration methods for the compressible nonhydrostatic equations. Mon. Wea. Rev.
# Skamarock, W. C., and J. B. Klemp, 2007: A time-split nonhydrostatic atmospheric model for research and NWP applications. J. Comp. Phys., special issue on environmental modeling.
#Skamarock, W. C., 2006: Positive-Definite and Montonic Limiters for Unrestricted-Timestep Transport Schemes. Mon. Wea. Rev., 134, 2241-2250.
# Skamarock, W. C., J. B. Klemp, J. Dudhia, D. O. Gill, D. M. Barker, W. Wang, and J. G. Powers, 2005: A description of the Advanced Research WRF Version 2. NCAR Tech Notes-468+STR.
# Skamarock, W. C., 2004: Evaluating Mesoscale NWP Models Using Kinetic Energy Spectra. Mon. Wea., Rev., 132, 3019-3032.
# Wicker, L. J., and W. C. Skamarock, 2002: Time splitting methods for elastic models using forward time schemes (pdf file). Mon. Wea. Rev., 130, 2088-2097.
}}
}}
{{Model technical information
{{Model technical information
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|Memory requirements=--
|Memory requirements=--
|Typical run time=--
|Typical run time=--
|Provide key papers on model if any=The following papers describe the equations and numerical schemes used in the WRF ARW core:
# Klemp, J. B., W. C. Skamarock, and J. Dudhia, 2007: Conservative split-explicit time integration methods for the compressible nonhydrostatic equations. Mon. Wea. Rev.
# Skamarock, W. C., and J. B. Klemp, 2007: A time-split nonhydrostatic atmospheric model for research and NWP applications. J. Comp. Phys., special issue on environmental modeling.
#Skamarock, W. C., 2006: Positive-Definite and Montonic Limiters for Unrestricted-Timestep Transport Schemes. Mon. Wea. Rev., 134, 2241-2250.
# Skamarock, W. C., J. B. Klemp, J. Dudhia, D. O. Gill, D. M. Barker, W. Wang, and J. G. Powers, 2005: A description of the Advanced Research WRF Version 2. NCAR Tech Notes-468+STR.
# Skamarock, W. C., 2004: Evaluating Mesoscale NWP Models Using Kinetic Energy Spectra. Mon. Wea., Rev., 132, 3019-3032.
# Wicker, L. J., and W. C. Skamarock, 2002: Time splitting methods for elastic models using forward time schemes (pdf file). Mon. Wea. Rev., 130, 2088-2097.
}}
}}
{{Input - Output description
{{Input - Output description
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|Describe post-processing software=WRF post-processing utilities: NCL, Vis5D, GrADS, RIP4, ARWpost, WPP, VAPOR (See: http://www.mmm.ucar.edu/wrf/users/docs/user_guide_V3/users_guide_chap2.htm)
|Describe post-processing software=WRF post-processing utilities: NCL, Vis5D, GrADS, RIP4, ARWpost, WPP, VAPOR (See: http://www.mmm.ucar.edu/wrf/users/docs/user_guide_V3/users_guide_chap2.htm)
|Visualization software needed?=No
|Visualization software needed?=No
|Other visualization software=Is within the model
|Provide key papers on model if any=The following papers describe the equations and numerical schemes used in the WRF ARW core:
# Klemp, J. B., W. C. Skamarock, and J. Dudhia, 2007: Conservative split-explicit time integration methods for the compressible nonhydrostatic equations. Mon. Wea. Rev.
# Skamarock, W. C., and J. B. Klemp, 2007: A time-split nonhydrostatic atmospheric model for research and NWP applications. J. Comp. Phys., special issue on environmental modeling.
#Skamarock, W. C., 2006: Positive-Definite and Montonic Limiters for Unrestricted-Timestep Transport Schemes. Mon. Wea. Rev., 134, 2241-2250.
# Skamarock, W. C., J. B. Klemp, J. Dudhia, D. O. Gill, D. M. Barker, W. Wang, and J. G. Powers, 2005: A description of the Advanced Research WRF Version 2. NCAR Tech Notes-468+STR.
# Skamarock, W. C., 2004: Evaluating Mesoscale NWP Models Using Kinetic Energy Spectra. Mon. Wea., Rev., 132, 3019-3032.
# Wicker, L. J., and W. C. Skamarock, 2002: Time splitting methods for elastic models using forward time schemes (pdf file). Mon. Wea. Rev., 130, 2088-2097.
}}
}}
{{Process description model
{{Process description model
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|Describe time scale and resolution constraints=--
|Describe time scale and resolution constraints=--
|Describe any numerical limitations and issues=--
|Describe any numerical limitations and issues=--
|Provide key papers on model if any=The following papers describe the equations and numerical schemes used in the WRF ARW core:
# Klemp, J. B., W. C. Skamarock, and J. Dudhia, 2007: Conservative split-explicit time integration methods for the compressible nonhydrostatic equations. Mon. Wea. Rev.
# Skamarock, W. C., and J. B. Klemp, 2007: A time-split nonhydrostatic atmospheric model for research and NWP applications. J. Comp. Phys., special issue on environmental modeling.
#Skamarock, W. C., 2006: Positive-Definite and Montonic Limiters for Unrestricted-Timestep Transport Schemes. Mon. Wea. Rev., 134, 2241-2250.
# Skamarock, W. C., J. B. Klemp, J. Dudhia, D. O. Gill, D. M. Barker, W. Wang, and J. G. Powers, 2005: A description of the Advanced Research WRF Version 2. NCAR Tech Notes-468+STR.
# Skamarock, W. C., 2004: Evaluating Mesoscale NWP Models Using Kinetic Energy Spectra. Mon. Wea., Rev., 132, 3019-3032.
# Wicker, L. J., and W. C. Skamarock, 2002: Time splitting methods for elastic models using forward time schemes (pdf file). Mon. Wea. Rev., 130, 2088-2097.
}}
}}
{{Model testing
{{Model testing
Line 62: Line 96:
|Describe available test data sets=--
|Describe available test data sets=--
|Describe ideal data for testing=--
|Describe ideal data for testing=--
|Provide key papers on model if any=The following papers describe the equations and numerical schemes used in the WRF ARW core:
# Klemp, J. B., W. C. Skamarock, and J. Dudhia, 2007: Conservative split-explicit time integration methods for the compressible nonhydrostatic equations. Mon. Wea. Rev.
# Skamarock, W. C., and J. B. Klemp, 2007: A time-split nonhydrostatic atmospheric model for research and NWP applications. J. Comp. Phys., special issue on environmental modeling.
#Skamarock, W. C., 2006: Positive-Definite and Montonic Limiters for Unrestricted-Timestep Transport Schemes. Mon. Wea. Rev., 134, 2241-2250.
# Skamarock, W. C., J. B. Klemp, J. Dudhia, D. O. Gill, D. M. Barker, W. Wang, and J. G. Powers, 2005: A description of the Advanced Research WRF Version 2. NCAR Tech Notes-468+STR.
# Skamarock, W. C., 2004: Evaluating Mesoscale NWP Models Using Kinetic Energy Spectra. Mon. Wea., Rev., 132, 3019-3032.
# Wicker, L. J., and W. C. Skamarock, 2002: Time splitting methods for elastic models using forward time schemes (pdf file). Mon. Wea. Rev., 130, 2088-2097.
}}
}}
{{Users groups model
{{Users groups model
|Do you have current or future plans for collaborating with other researchers?=The effort to develop WRF has been a collaborative partnership, principally among the National Center for Atmospheric Research (NCAR), the National Oceanic and Atmospheric Administration (the National Centers for Environmental Prediction (NCEP) and the Forecast Systems Laboratory (FSL), the Air Force Weather Agency (AFWA), the Naval Research Laboratory, the University of Oklahoma, and the Federal Aviation Administration (FAA). WRF allows researchers the ability to conduct simulations reflecting either real data or idealized configurations. WRF provides operational forecasting a model that is flexible and efficient computationally, while offering the advances in physics, numerics, and data assimilation contributed by the research community.
|Do you have current or future plans for collaborating with other researchers?=The effort to develop WRF has been a collaborative partnership, principally among the National Center for Atmospheric Research (NCAR), the National Oceanic and Atmospheric Administration (the National Centers for Environmental Prediction (NCEP) and the Forecast Systems Laboratory (FSL), the Air Force Weather Agency (AFWA), the Naval Research Laboratory, the University of Oklahoma, and the Federal Aviation Administration (FAA). WRF allows researchers the ability to conduct simulations reflecting either real data or idealized configurations. WRF provides operational forecasting a model that is flexible and efficient computationally, while offering the advances in physics, numerics, and data assimilation contributed by the research community.
}}
{{Documentation model
|Provide key papers on model if any=The following papers describe the equations and numerical schemes used in the WRF ARW core:
|Provide key papers on model if any=The following papers describe the equations and numerical schemes used in the WRF ARW core:
# Klemp, J. B., W. C. Skamarock, and J. Dudhia, 2007: Conservative split-explicit time integration methods for the compressible nonhydrostatic equations. Mon. Wea. Rev.
# Klemp, J. B., W. C. Skamarock, and J. Dudhia, 2007: Conservative split-explicit time integration methods for the compressible nonhydrostatic equations. Mon. Wea. Rev.
Line 74: Line 113:
# Skamarock, W. C., 2004: Evaluating Mesoscale NWP Models Using Kinetic Energy Spectra. Mon. Wea., Rev., 132, 3019-3032.
# Skamarock, W. C., 2004: Evaluating Mesoscale NWP Models Using Kinetic Energy Spectra. Mon. Wea., Rev., 132, 3019-3032.
# Wicker, L. J., and W. C. Skamarock, 2002: Time splitting methods for elastic models using forward time schemes (pdf file). Mon. Wea. Rev., 130, 2088-2097.
# Wicker, L. J., and W. C. Skamarock, 2002: Time splitting methods for elastic models using forward time schemes (pdf file). Mon. Wea. Rev., 130, 2088-2097.
}}
{{Documentation model
|Manual model available=Yes
|Manual model available=Yes
|Model website if any=http://www.wrf-model.org/index.php,
|Model website if any=http://www.wrf-model.org/index.php,
http://www.mmm.ucar.edu/wrf/users/docs/user_guide/contents.html
http://www.mmm.ucar.edu/wrf/users/docs/user_guide/contents.html
|Model forum=http://forum.wrfforum.com/
|Model forum=http://forum.wrfforum.com/
|Provide key papers on model if any=The following papers describe the equations and numerical schemes used in the WRF ARW core:
# Klemp, J. B., W. C. Skamarock, and J. Dudhia, 2007: Conservative split-explicit time integration methods for the compressible nonhydrostatic equations. Mon. Wea. Rev.
# Skamarock, W. C., and J. B. Klemp, 2007: A time-split nonhydrostatic atmospheric model for research and NWP applications. J. Comp. Phys., special issue on environmental modeling.
#Skamarock, W. C., 2006: Positive-Definite and Montonic Limiters for Unrestricted-Timestep Transport Schemes. Mon. Wea. Rev., 134, 2241-2250.
# Skamarock, W. C., J. B. Klemp, J. Dudhia, D. O. Gill, D. M. Barker, W. Wang, and J. G. Powers, 2005: A description of the Advanced Research WRF Version 2. NCAR Tech Notes-468+STR.
# Skamarock, W. C., 2004: Evaluating Mesoscale NWP Models Using Kinetic Energy Spectra. Mon. Wea., Rev., 132, 3019-3032.
# Wicker, L. J., and W. C. Skamarock, 2002: Time splitting methods for elastic models using forward time schemes (pdf file). Mon. Wea. Rev., 130, 2088-2097.
}}
}}
{{Additional comments model
{{Additional comments model
Line 85: Line 133:
http://www.mmm.ucar.edu/wrf/users/download/get_source.html
http://www.mmm.ucar.edu/wrf/users/download/get_source.html
So no registration is needed.
So no registration is needed.
|Provide key papers on model if any=The following papers describe the equations and numerical schemes used in the WRF ARW core:
# Klemp, J. B., W. C. Skamarock, and J. Dudhia, 2007: Conservative split-explicit time integration methods for the compressible nonhydrostatic equations. Mon. Wea. Rev.
# Skamarock, W. C., and J. B. Klemp, 2007: A time-split nonhydrostatic atmospheric model for research and NWP applications. J. Comp. Phys., special issue on environmental modeling.
#Skamarock, W. C., 2006: Positive-Definite and Montonic Limiters for Unrestricted-Timestep Transport Schemes. Mon. Wea. Rev., 134, 2241-2250.
# Skamarock, W. C., J. B. Klemp, J. Dudhia, D. O. Gill, D. M. Barker, W. Wang, and J. G. Powers, 2005: A description of the Advanced Research WRF Version 2. NCAR Tech Notes-468+STR.
# Skamarock, W. C., 2004: Evaluating Mesoscale NWP Models Using Kinetic Energy Spectra. Mon. Wea., Rev., 132, 3019-3032.
# Wicker, L. J., and W. C. Skamarock, 2002: Time splitting methods for elastic models using forward time schemes (pdf file). Mon. Wea. Rev., 130, 2088-2097.
}}
}}
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Revision as of 14:58, 21 March 2011

Contact

Name Bill Skamarock
Type of contact Project manager
Institute / Organization NCAR
Postal address 1 1850 Table Mesa Dr
Postal address 2
Town / City Boulder
Postal code 80305
State Colorado
Country USA"USA" is not in the list (Afghanistan, Albania, Algeria, Andorra, Angola, Antigua and Barbuda, Argentina, Armenia, Australia, Austria, ...) of allowed values for the "Country" property.
Email address wrfhelp@ucar.edu
Phone (303) 497-1000
Fax



WRF

This code has been community reviewed and published in the open access Journal of Open Source Software (JOSS)


Metadata

Summary

Also known as
Model type Modular
Model part of larger framework
Note on status model
Date note status model

Technical specs

Supported platforms
Linux, Mac OS
Other platform Darwin
Programming language

Fortran90, C

Other program language Fortran95, Perl
Code optimized Parallel

Computing"Parallel </br>Computing" is not in the list (Single Processor, Multiple Processors) of allowed values for the "Code optimized" property.

Multiple processors implemented
Nr of distributed processors
Nr of shared processors
Start year development 1998
Does model development still take place? Yes
If above answer is no, provide end year model development
Code development status
When did you indicate the 'code development status'?
Model availability As code
Source code availability
(Or provide future intension) 		Through web repository
Source web address http://www.mmm.ucar.edu/wrf/users/download/get_source.html
Source csdms web address
Program license type Other
Program license type other WRF was developed at the National Center for Atmospheric Research (NCAR) which is operated by the University Corporation for Atmospheric Research (UCAR). NCAR and UCAR make no proprietary claims, either statutory or otherwise, to this version and release of WRF and consider WRF to be in the public domain for use by any person or entity for any purpose without any fee or charge. UCAR requests that any WRF user include this notice on any partial or full copies of WRF. WRF is provided on an "AS IS" basis and any warranties, either express or implied, including but not limited to implied warranties of non-infringement, originality, merchantability and fitness for a particular purpose, are disclaimed. In no event shall UCAR be liable for any damages, whatsoever, whether direct, indirect, consequential or special, that arise out of or in connection with the access, use or performance of WRF, including infringement actions. WRF® is a registered trademark of the University Corporation for Atmospheric Research (UCAR).
Memory requirements --
Typical run time --


In/Output

Describe input parameters --
Input format
Other input format
Describe output parameters --
Output format
Other output format
Pre-processing software needed? Yes
Describe pre-processing software The WRF Preprocessing System (WPS) is a set of three programs whose collective role is to prepare input to the real program for real-data simulations. Each of the programs performs one stage of the preparation: geogrid defines model domains and interpolates static geographical data to the grids; ungrib extracts meteorological fields from GRIB-formatted files; and metgrid horizontally interpolates the meteorological fields extracted by ungrib to the model grids defined by geogrid. (See also: http://www.mmm.ucar.edu/wrf/users/docs/user_guide_V3/users_guide_chap3.htm)
Post-processing software needed? Yes
Describe post-processing software WRF post-processing utilities: NCL, Vis5D, GrADS, RIP4, ARWpost, WPP, VAPOR (See: http://www.mmm.ucar.edu/wrf/users/docs/user_guide_V3/users_guide_chap2.htm)
Visualization software needed? No
If above answer is yes
Other visualization software


Process

Describe processes represented by the model To simulate real weather and to do simulations with coarse resolutions, a minimum set of physics components is required, namely radiation, boundary layer and land-surface parameterization, convective parameterization, subgrid eddy diffusion, and microphysics. Since the model is developed for both research and operational groups, sophisticated physics schemes and simple physics schemes are needed in the model. The objectives of the WRF physics development are to implement a basic set of physics into the WRF model and to design a user friendly physics interface. Since the WRF model is targeted at resolutions of 1-10 km, some of physics schemes might not work properly in this high resolution (e.g. cumulus parameterization). However, at this early stage of model development, only existing physics schemes are implemented, and most of them are taken from current mesoscale and cloud models. In the future, new physics schemes designed for resolutions of 1-10 km should be developed and implemented. See http://www.mmm.ucar.edu/wrf/users/docs/wrf-phy.html#physics_scheme for more information
Describe key physical parameters and equations The WRF-ARW core is based on an Eulerian solver for the fully compressible nonhydrostatic equations, cast in flux (conservative) form, using a mass (hydrostatic pressure) vertical coordinate. Prognostic variables for this solver are column mass of dry air (mu), velocities u, v and w (vertical velocity), potential temperature, and geopotential. Non-conserved variables (e.g. temperature, pressure, density) are diagnosed from the conserved prognostic variables. The solver uses a third-order Runge-Kutta time-integration scheme coupled with a split-explicit 2nd-order time integration scheme for the acoustic and gravity-wave modes. 5th-order upwind-biased advection operators are used in the fully conservative flux divergence integration; 2nd-6th order schemes are run-time selectable.
Describe length scale and resolution constraints --
Describe time scale and resolution constraints --
Describe any numerical limitations and issues --


Testing

Describe available calibration data sets --
Upload calibration data sets if available:
Describe available test data sets --
Upload test data sets if available:
Describe ideal data for testing --


Other

Do you have current or future plans for collaborating with other researchers? The effort to develop WRF has been a collaborative partnership, principally among the National Center for Atmospheric Research (NCAR), the National Oceanic and Atmospheric Administration (the National Centers for Environmental Prediction (NCEP) and the Forecast Systems Laboratory (FSL), the Air Force Weather Agency (AFWA), the Naval Research Laboratory, the University of Oklahoma, and the Federal Aviation Administration (FAA). WRF allows researchers the ability to conduct simulations reflecting either real data or idealized configurations. WRF provides operational forecasting a model that is flexible and efficient computationally, while offering the advances in physics, numerics, and data assimilation contributed by the research community.
Is there a manual available? Yes
Upload manual if available:
Model website if any http://www.wrf-model.org/index.php,

http://www.mmm.ucar.edu/wrf/users/docs/user_guide/contents.html

Model forum / discussion board http://forum.wrfforum.com/
Comments WRF has a rapidly growing community of users, and workshops and tutorials are held each year at NCAR. WRF is currently in operational use at NCEP, AFWA and other centers.

Notice: WRF source code is freely available on the following site: http://www.mmm.ucar.edu/wrf/users/download/get_source.html So no registration is needed.



Introduction

History

Papers

Issues

Help

Input Files

Output Files

Download

Source

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