Difference between revisions of "Fire module in WRF 3.3"

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This page tracks the evolution of the fire module from the submission to the 3.3 release.
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#redirect[[Changes in WRF-Fire 3.3 release]]
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==Release branch==
 
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To track the files, {{WRF-Fire-branch|WRF_release_3.3}} was created starting from the files as submitted, applied one submitted bug fix, and ending with the files from the WRF 3.3 release at http://www.mmm.ucar.edu/wrf/src/WRFV3.3.TAR.gz
 
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==Links to versions==
 
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*Version {{WRF-Fire-commit|fa26d08d8154124ac51514b11bc671eb312e20f8|Nov 20, 2010}} as originally submitted to WRF committee for the 3.3 release
 
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*Bug fix {{WRF-Fire-commit|3f78267b38e0f0a36da49a58b8f00d00789ee67a|Jan 18, 2011}}. This is the final version submitted to the WRF committee.
 
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*{{WRF-Fire-commit|9a4e38390e19b612be459c4aacfdfb427ca472ba|Files after changes at NCAR}} in the submitted fire module files.
 
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*{{WRF-Fire-commit|b6fe157d04510be2b2b081e4478169e8e18f9601|Final files in the release}} after changes to the rest of the files
 
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==Changes at NCAR prior to the release==
 
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* Janice's changes in fire module files. See also [http://mailman.ucar.edu/pipermail/wrf-fire/2011-April/000053.html her post describing the additional changes].
 
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** Removed the wind factors feature [https://github.com/jbeezley/wrf-fire/commit/9a4e38390e19b612be459c4aacfdfb427ca472ba#L5L254] [https://github.com/jbeezley/wrf-fire/commit/9a4e38390e19b612be459c4aacfdfb427ca472ba#L5L506]. This limits the code to ideal runs with a single fuel, see [[#Details on the wind factors|details]]. This is the only change of substance in the code.
 
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** Edited comments [https://github.com/jbeezley/wrf-fire/commit/9a4e38390e19b612be459c4aacfdfb427ca472ba#L0L3] [https://github.com/jbeezley/wrf-fire/commit/9a4e38390e19b612be459c4aacfdfb427ca472ba#L1L2] [https://github.com/jbeezley/wrf-fire/commit/9a4e38390e19b612be459c4aacfdfb427ca472ba#L2L1] [https://github.com/jbeezley/wrf-fire/commit/9a4e38390e19b612be459c4aacfdfb427ca472ba#L5L486] [https://github.com/jbeezley/wrf-fire/commit/9a4e38390e19b612be459c4aacfdfb427ca472ba#L6L2].
 
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** Small (max about 1%) changes to default values of fuel data variables [https://github.com/jbeezley/wrf-fire/commit/9a4e38390e19b612be459c4aacfdfb427ca472ba#L5L123]
 
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** Renamed variable ros_back to ros_base [https://github.com/jbeezley/wrf-fire/commit/9a4e38390e19b612be459c4aacfdfb427ca472ba#L5L701], added local variable ros_back [https://github.com/jbeezley/wrf-fire/commit/9a4e38390e19b612be459c4aacfdfb427ca472ba#L5R683] used only in chapparal. Two lines change results: [https://github.com/jbeezley/wrf-fire/commit/9a4e38390e19b612be459c4aacfdfb427ca472ba#L5L761] in the MacArthur formula and [https://github.com/jbeezley/wrf-fire/commit/9a4e38390e19b612be459c4aacfdfb427ca472ba#L5L776] in chaparral have the effect of increasing the spread rate by adding the zero-wind rate twice.
 
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** Deleted the identification of the git commit the files come from [https://github.com/jbeezley/wrf-fire/commit/9a4e38390e19b612be459c4aacfdfb427ca472ba#L2L136] [https://github.com/jbeezley/wrf-fire/commit/9a4e38390e19b612be459c4aacfdfb427ca472ba#L6L1322] (appropriate when the files are no longer the same)
 
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** Replaced all examples by two new ones.
 
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*Routine software engineering changes: Added ONLY to USE statements [https://github.com/jbeezley/wrf-fire/commit/9a4e38390e19b612be459c4aacfdfb427ca472ba#L2L1] [https://github.com/jbeezley/wrf-fire/commit/9a4e38390e19b612be459c4aacfdfb427ca472ba#L2L798] [https://github.com/jbeezley/wrf-fire/commit/9a4e38390e19b612be459c4aacfdfb427ca472ba#L3L22] [https://github.com/jbeezley/wrf-fire/commit/9a4e38390e19b612be459c4aacfdfb427ca472ba#L6L1411] [https://github.com/jbeezley/wrf-fire/commit/9a4e38390e19b612be459c4aacfdfb427ca472ba#L6L1337] [https://github.com/jbeezley/wrf-fire/commit/9a4e38390e19b612be459c4aacfdfb427ca472ba#L6L1411]
 
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===Details on the wind factors===
 
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The change has the same effect as setting all windrf=1 in the data with the submitted code. The default value of fire_wind_height was not changed in the registry and remains at 6.096m; this results in 2-3 times increase of wind-driven spread rates when running the code at defaults. [http://mailman.ucar.edu/pipermail/wrf-fire/2011-April/000053.html The intention] was to set fire_wind_height to a smaller value in the namelist, but then the value is the same for all fuels.
 
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The winds factors feature is important for the computations reported in [http://www.geosci-model-dev-discuss.net/4/497/2011/gmdd-4-497-2011.html our GMDD paper]. It was surpassed later by [[Talk:WRF-Fire_development_notes#Wind_interpolation_to_different_heights_for_different_fuels|Wind interpolation to different heights for different fuels]], which is not in the release.
 

Latest revision as of 01:51, 19 May 2011

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