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WRF Version 4.0.3
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@kkeene44 kkeene44 released this 18 Dec 18:18
· 865 commits to master since this release
v4.0.3
093ea62

The WRF model has been updated to Version 4.0.3 on December 18, 2018.

Acknowledgements: We would like to thank Xu Zhang (Shanghai Typhoon Institute), J. Fidel González-Rouco (UCM & IGEO-CSIC, Spain), Jorge Navarro and Elena García-Bustamante (CIEMAT, Spain), and Carlos Ross (DFM Consultores) for their contributions to this release.

This is a bug fix release. Following are fixes associated with this release.

Dynamics:

  • LES options in V4.0 with use_theta_m=1 (default) contained an error with surface fluxes leading to a cooler PBL. QFX term has been added to surface theta_m flux to correct this problem.
  • Fixed a non-bit-for-bit restart problem with the diff_6th_opt option. The error was due to the start and end indices too close to the domain boundaries when doing 6th order horizontal diffusions. Because the loop indices are changes, the results from any run that uses this option will also change. This was a bug since this option was added to the model in V3.1. Thanks to Jorge Navarro for the initial report that led to the discovery of the bug.

Physics:

  • Fix for a problem that occurred if a user were to use NLCD and MODIS landuse static data together for an urban application. All urban land use categories were assigned type 13, which is correct for MODIS, but NLCD urban high-resolution categories should be assigned 24, 25, and 26 (and should be preferentially used, when available).

Ideal cases:

  • Idealized cases will now utilize the “set_physics_rconfigs” and “check_nml_consistency” subroutines from share/module_check_a_mundo.F. This will ensure that namelist requirements are not overlooked, and that the correct number of soil layers is assigned to cases, depending on what (if any) LSM scheme is used.

Data Assimilation:

  • A syntax error was introduced with the v4.0 release that breaks the build of the WRFPLUS code (and only the WRFPLUS code) v19.0.1 of the Intel compiler. An OpenMP parallel loop was incorrectly constructed. That syntax error has been removed, though it is important to note that WRFPLUS never was intended to work with OpenMP, and the WRFPLUS code continues to only work with serial or DM build options.

Ndown:

  • A fix to the Registry.EM_COMMON file to correct a problem causing a few variables to be identically zero in the fine-grid ndown run or nesting run when input_from_file = .false.

Configuration:

  • WRF now supports the correct compiler flag for OpenMP builds with newer Intel compilers, v18.0 and later. The Intel-recommended flag (-qopenmp) was tested successfully with Intel 16.0.1, 17.0.1, and 18.0.1.

Obs-Nudging:

  • After removing a hard-coded limit for an assumed maximum number of MPI tasks, the observation nudging code for WRF now supports more than 1024 MPI tasks. If users previously ran the obs-nudging code with 1024 or fewer MPI tasks, the original code is OK; however, if users attempted to run obs-nudging with >1024 MPI tasks, likely the code died with a segmentation fault while trying to access an address for an array index that was not available.
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