hybrid coordinate:
"It is mandatory to use the terrain following coordinate
system (hybrid_opt=0)"?
#404 (comment)
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.. Important :: |
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This tutorial was designed to be compatible with WRF Version 4 and later, and was |
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tested with WRFv4.5.2. It is mandatory to use the terrain following coordinate |
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system (hybrid_opt=0) and not the default sigma hybrid coordinates (hybrid_opt=1) |
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when using WRF-DART. Using the sigma hybrid coordinate can lead to adverse effects |
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when generating ensemble spread leading to poor forecast performance. For more |
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details see `DART Issue #650 <https://github.com/NCAR/DART/pull/650>`__. |
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! hybrid_opt 2 is a hybrid coordinate - terrain following at the |
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! surface, and straight pressure levels at the top. |
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integer, parameter :: VERT_HYBRID = 2 |
Apparently the "It is mandatory to use the terrain following coordinate
system" is only when using WRF CV3 perturbation to generate the boundary condition perturbed ensemble.
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echo "ERROR: WRF-DART must use terrain following coordinates, hybrid_opt must be 0" |
Needs to be explained in the docs.
Came in in d85b7a0
part of #1030
Originally posted by @hkershaw-brown in #741 (comment)
hybrid coordinate:
"It is mandatory to use the terrain following coordinate
system (hybrid_opt=0)"?
#404 (comment)
DART/models/wrf/tutorial/README.rst
Lines 21 to 28 in 80502a8
DART/models/wrf/model_mod.f90
Lines 288 to 290 in 80502a8
Apparently the "It is mandatory to use the terrain following coordinate
system" is only when using WRF CV3 perturbation to generate the boundary condition perturbed ensemble.
DART/models/wrf/shell_scripts/gen_retro_icbc.sh
Line 70 in 80502a8
Needs to be explained in the docs.
Came in in d85b7a0
part of #1030
Originally posted by @hkershaw-brown in #741 (comment)