Search found 335 matches

by mgduda
Wed Aug 12, 2020 5:15 pm
Forum: Running
Topic: 15km uniform, Initial Condition failed
Replies: 2
Views: 31

Re: 15km uniform, Initial Condition failed

The error messages ERROR: MPAS IO Error: Bad return value from PIO are most likely a result of some variables (e.g., 'zb3', which is dimensioned by [nVertLevels+1, 2, nEdges]) exceeding the format restrictions of the default CDF-2 file format (which permits files to be larger than 4 GB while still r...
by mgduda
Wed Aug 12, 2020 12:49 am
Forum: Post-processing
Topic: How to extract wind(zonal & meridional), geopotential height using the convert_mpas include_field
Replies: 3
Views: 132

Re: How to extract wind(zonal & meridional), geopotential height using the convert_mpas include_field

I'm very sorry again for the delay in my reply. I've attached a Python script that may be helpful in vertically interpolating the zonal and meridional winds from the native model levels in the diagnostics files to isobaric levels. A complete workflow might involve the following steps: Ensure that th...
by mgduda
Thu Aug 06, 2020 10:01 pm
Forum: Code development
Topic: Sea Ice Thickness Update
Replies: 1
Views: 50

Re: Sea Ice Thickness Update

Thanks very much for inquiring about this! Are there global sea ice thickness datasets that are readily available? If so, then this might be worth adding to a future release; otherwise, perhaps a capability with no available input data might be of less general interest. Either way, we have been thin...
by mgduda
Thu Aug 06, 2020 9:52 pm
Forum: Miscellaneous WPS
Topic: How can I know which interpolation method was used
Replies: 2
Views: 28

Re: How can I know which interpolation method was used

The figures in question (slides 32 and 35 of the Advance WPS tutorial presentation) were produced using a modified version of the metgrid code some years back. Unfortunately, this modified metgrid code wasn't saved, and isn't available as part of any release of the WPS. In case you'd like to determi...
by mgduda
Tue Aug 04, 2020 4:32 pm
Forum: Running
Topic: where can I obtain the tutorial of MPAS
Replies: 1
Views: 13

Re: where can I obtain the tutorial of MPAS

From the MPAS homepage, you can follow the "MPAS-Atmosphere download" link on the left to a page. The download page has links to the User's Guide and to the online tutorial, which contains lecture slides as well as practical exercises.
by mgduda
Thu Jul 30, 2020 4:19 pm
Forum: Running
Topic: An error with variable-resolution mesh simulation
Replies: 5
Views: 77

Re: An error with variable-resolution mesh simulation

Thanks very much for following up. In general, the soil temperature and soil moisture fields from NCEP's GFS should work fine. Simply changing an ERROR into a WARNING may not always be a good idea -- the ERROR messages in the init_atmosphere_model program are designed to prevent the model from runni...
by mgduda
Wed Jul 29, 2020 4:27 pm
Forum: Running
Topic: An error with variable-resolution mesh simulation
Replies: 5
Views: 77

Re: An error with variable-resolution mesh simulation

The error message Error in interpolation of st_fg to MPAS grid: num_st = XX generally indicates that there are grid cells that have a soil temperature value less than or equal to zero. What soil temperature dataset are you using? Or, more generally, what dataset are you trying to use for initial con...
by mgduda
Wed Jul 29, 2020 4:00 pm
Forum: Running
Topic: Tracers
Replies: 2
Views: 35

Re: Tracers

The MPAS shallow water model hasn't been updated or maintained for some time, and it's generally not supported. However, I think a quick work-around in this case would be to simply hard-wire the 'nTracers' dimension to a value of 1 in the Registry.xml file. In src/core_sw/Registry.xml, you can try c...
by mgduda
Mon Jul 20, 2020 7:20 pm
Forum: WPS Compiling/Installation
Topic: Not generating ungrib.exe
Replies: 1
Views: 59

Re: Not generating ungrib.exe

Which version of the WPS are you using? This looks like the same issue that was addressed by WPS PR #119 prior to the WPS v4.1 release last year.
by mgduda
Wed Jul 15, 2020 12:56 am
Forum: Running
Topic: Running Atmosphere Model/
Replies: 6
Views: 119

Re: Running Atmosphere Model/

These messages in your log file could be indicative of problems with the initial conditions: Troubles finding level 100.000 above ground. Problems first occur at (170) Surface pressure = NaN hPa. *** MSLP field will not be computed Have you tried taking a quick look through your initial conditions f...
by mgduda
Tue Jul 14, 2020 8:05 pm
Forum: Running
Topic: Static Initialization Failure - 15km uniform mesh
Replies: 10
Views: 298

Re: Static Initialization Failure - 15km uniform mesh

Sorry for the delayed reply. I think the 10-km mesh download should include a convex partition file with 64 partitions (x1.5898242.cvt.part.64). If you encounter any issues with this partition file, just let me know and I'll be glad to help!
by mgduda
Tue Jul 14, 2020 7:22 pm
Forum: Running
Topic: Running Atmosphere Model/
Replies: 6
Views: 119

Re: Running Atmosphere Model/

The x4.535554 mesh refines to a minimum grid distance of about 15 km. Could you try making two adjustments in your namelist.atmosphere file: config_dt = 90.0 config_len_disp = 15000.0 In general, the value of 'config_len_disp' should match the minimum grid distance in meters in your mesh. There is s...
by mgduda
Tue Jul 14, 2020 4:26 pm
Forum: Running
Topic: Running Atmosphere Model/
Replies: 6
Views: 119

Re: Running Atmosphere Model/

Could you attach your namelist.atmosphere file and your namelist.init_atmosphere file (as it was when you created your initial conditions)? It may also be worth checking that the 'theta' (potential temperature), 'rho' (dry air density), and 'u' (normal component of horizontal velocity) fields in you...
by mgduda
Mon Jul 13, 2020 8:19 pm
Forum: Running
Topic: Run coupled Atmosphere-Ocean MPAS model
Replies: 1
Views: 51

Re: Run coupled Atmosphere-Ocean MPAS model

Essentially, running MPAS-Atmosphere and MPAS-Ocean in a coupled configuration is neither possible nor supported in the current release (v7.0). For a few more details, please see this thread.
by mgduda
Sun Jul 12, 2020 8:25 pm
Forum: metgrid
Topic: Metgrid - missing values in fields
Replies: 2
Views: 57

Re: Metgrid - missing values in fields

Based on the output of the rd_intermediate.exe utility from your example intermediate file ================================================ FIELD = PMSL UNITS = Pa DESCRIPTION = Sea-level Pressure DATE = 2020-07-08_12:00:00 FCST = 0.000000 SOURCE = NCEP GFS Model LEVEL = 201300.000000 I,J DIMS = 585...
by mgduda
Sun Jul 12, 2020 6:06 pm
Forum: geogrid
Topic: Error while running geogrid first time
Replies: 10
Views: 162

Re: Error while running geogrid first time

I think you may be missing the beginning "/" character, and you need to add the suffix "/lib" (assuming that agrees with the installation path of the files like "libnetcdf.a". Also, you need to export the variable. Can you try the following: export LD_LIBRARY_PATH=/home/ggp17mkm/Build_WRF/LIBRARIES/...
by mgduda
Tue Jul 07, 2020 7:12 pm
Forum: Compilation / installation
Topic: Creating .nc file using Greate_Region.
Replies: 4
Views: 207

Re: Creating .nc file using Greate_Region.

If you haven't already done so, it might be worth going through the online MPAS-Atmosphere tutorial , especially section 4, before attempting your own limited-area simulation. From the tutorial, the following two sets of slides may be of particular help: Variable-resolution meshes, I/O streams, rest...
by mgduda
Tue Jul 07, 2020 7:02 pm
Forum: Running
Topic: An Error with Regional Simulation
Replies: 1
Views: 78

Re: An Error with Regional Simulation

As described in Section 8.2 of the User's Guide , you will need to set up the "input" stream to read a file that contains information about the vertical grid, since the creation of LBCs involves not only horizontal interpolation but also vertical interpolation. If you have already generated initial ...
by mgduda
Tue Jun 30, 2020 7:44 pm
Forum: ungrib
Topic: ERA-5 data qustion
Replies: 5
Views: 101

Re: ERA-5 data qustion

Actually, as suggested earlier by Ming Chen, you can simply link all of the variables in one go with the link_grib.csh script. Ungrib should have no problems in processing files that individually contain only a single variable but that collectively provide all required fields for model initialization.
by mgduda
Tue Jun 30, 2020 7:34 pm
Forum: Miscellaneous
Topic: Comparing Dual-Doppler Radar Analysis to WRF Output
Replies: 3
Views: 113

Re: Comparing Dual-Doppler Radar Analysis to WRF Output

I think knowing only the latitude and longitude of the (0,0) point, along with the fact that all points are spaced 1 km apart (along two orthogonal axes?) may not be enough information to determine the latitude and longitude of every point. For example, in the figures below, the points are at 1 km s...
by mgduda
Tue Jun 30, 2020 4:14 pm
Forum: ungrib
Topic: Why GRIB file must be linked and have specific extenssion
Replies: 4
Views: 82

Re: Why GRIB file must be linked and have specific extenssion

If you need to process more than 26^3 GRIB files, the easiest approach would be to just process the files in batches. These batches of files could even be processed in parallel, e.g., on different nodes of a computing cluster, since the processing of one GRIB file is (almost) independent of the proc...
by mgduda
Tue Jun 30, 2020 4:03 pm
Forum: geogrid
Topic: WPS geogrid projection
Replies: 5
Views: 114

Re: WPS geogrid projection

The WRF model uses a spherical datum with a radius of 6370000 m . The transformations between projection and geographic coordinates are implemented in module_map_utils.F beginning around line 1083, which should follow the formulae in Map Projections: A Working Manual ( USGS Professional Paper 1395 ).
by mgduda
Fri Jun 26, 2020 7:41 pm
Forum: geogrid
Topic: Error while running geogrid first time
Replies: 10
Views: 162

Re: Error while running geogrid first time

This might just be an issue of correctly setting the LD_LIBRARY_PATH environment variable to include the path to the netCDF shared library.
by mgduda
Fri Jun 26, 2020 7:39 pm
Forum: Code development
Topic: Nudging
Replies: 3
Views: 158

Re: Nudging

@lpasmanoranjan This section of the forum is for the MPAS-Atmosphere model. If your question is about the WRF model, could you post it in one of the WRF sections of the forum?
by mgduda
Wed Jun 24, 2020 1:41 pm
Forum: Code development
Topic: Inserting write-statements into PIO
Replies: 16
Views: 216

Re: Inserting write-statements into PIO

Thanks very much for following-up. It's good to know that there isn't any redirection of stdout/stderr at fault. I remember running into similar problems when debugging PIO with print statements in the past, too -- it took me a few wrong guesses before I put my write statements in the correct implem...

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