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Merge pull request #698 from NCAR/inf_doc
Moved inflation file name description from netcdf_inflation_files.rst
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guide/inflation.rst

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@@ -90,9 +90,11 @@ In the namelist each entry has two values. The first is for Prior inflation and
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``&filter_nml :: inf_initial_from_restart``
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*valid values:* .true. or .false.
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If true, read the inflation values from an inflation restart file named ``input_{prior,post}inf_mean.nc.`` An initial
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run could be done to let spatially-varying inflation values evolve in a spinup phase, and then the saved values can
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be read back in and used as fixed values in further runs. Or if time-varying inflation is used, then the restart file
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If true, read the inflation values from an inflation restart file named ``input_{prior,post}inf_mean{_d##}.nc``,
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(d\#\# is the domain number, if needed).
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An initial run could be done to let spatially-varying inflation values evolve in a spinup phase,
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and then the saved values can be read back in and used as fixed values in further runs.
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Or if time-varying inflation is used, then the restart file
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from the previous job step must be supplied as an input file for the next step.
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``&filter_nml :: inf_initial``
@@ -127,8 +129,8 @@ In the namelist each entry has two values. The first is for Prior inflation and
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``&filter_nml :: inf_sd_initial_from_restart``
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*valid values:* .true. or .false.
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If true, read the inflation standard deviation values from an restart file named ``input_{prior,post}inf_sd.nc.`` See
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the comments above about ``inflation_initial_from_restart``.
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If true, read the inflation standard deviation values from an restart file named ``input_{prior,post}inf_sd{_d##}.nc.``
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See the comments above about ``inflation_initial_from_restart``.
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``&filter_nml :: inf_sd_initial``
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*valid values:* ≤ 0.0 to disable evolution of inflation, > 0.0 otherwise
@@ -188,7 +190,8 @@ The suggested procedure for testing inflation options is to start without any (b
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``inf_damping`` > 0.). Then enable Prior state space, spatially-varying inflation, with no Posterior inflation (set
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``inf_flavor`` to [2, 0]). Then try damped inflation (set ``inf_damping`` to 0.9 and set ``inf_sd_initial`` and
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``inf_sd_lower_bound`` to 0.6). The inflation values and standard deviation are written out to files with
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``_{prior,post}inf_{mean,sd}`` in their names. These NetCDF files can be viewed with common tools (we often use
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``_{prior,post}inf_{mean,sd}{_d##}.nc``, in their names
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(d\#\# is the domain number, if needed). These NetCDF files can be viewed with common tools (we often use
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`ncview <http://meteora.ucsd.edu/~pierce/ncview_home_page.html>`__ ). Expected inflation values are generally in the 1
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to 30 range; if values grow much larger than this it usually indicates a problem with the assimilation.
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@@ -207,11 +210,11 @@ Here's an example of using ncap2 to set the T,U and V inf values:
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::
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ncap2 -s 'T=1.0;U=1.0;V=1.0' wrfinput_d01 input_priorinf_mean.nc
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ncap2 -s 'T=0.6;U=0.6;V=0.6' wrfinput_d01 input_priorinf_sd.nc
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ncap2 -s 'T=1.0;U=1.0;V=1.0' wrfinput_d01 input_priorinf_mean_d01.nc
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ncap2 -s 'T=0.6;U=0.6;V=0.6' wrfinput_d01 input_priorinf_sd_d01.nc
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-or-
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ncap2 -s 'T(:,:,:)=1.0;U(:,:,:)=1.0;V(:,:,:)=1.0' wrfinput_d01 input_priorinf_mean.nc
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ncap2 -s 'T(:,:,:)=0.6;U(:,:,:)=0.6;V(:,:,:)=0.6' wrfinput_d01 input_priorinf_sd.nc
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ncap2 -s 'T(:,:,:)=1.0;U(:,:,:)=1.0;V(:,:,:)=1.0' wrfinput_d01 input_priorinf_mean_d01.nc
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ncap2 -s 'T(:,:,:)=0.6;U(:,:,:)=0.6;V(:,:,:)=0.6' wrfinput_d01 input_priorinf_sd_d01.nc
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Some versions of the NCO utilities change the full 3D arrays into a single scalar. If that's your result (check your
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output with ``ncdump -h``) use the alternate syntax or a more recent version of the NCO tools.

guide/netcdf_inflation_files.rst

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