CDO - Support: RE: Difficulty remapping data on MPI-ESM1-2-LR grid
Thanks Uwe! Another solution is to change the grid type to unstructured and then select a lon lat box that is slightly bigger than the polygon in question. I will compare the results to your fldmean...
View ArticleCDO - Support: Region definition for selregion
Hi all,I assume that the region definition file for the selregion command in 2.0.4 is the same ask for the maskregion command. Is this true?I also have a question about the geometry of the selection...
View ArticleCDO - Support: selregion fails on CMIP6 GISS ocean grid
As the title says. The selregion command fails on the ocean model grid for GISS-E2-1-G:$ cdo -O -V selregion,"cdo_region_nwa.txt" zos_Omon_GISS-E2-1-G_historical_r1i1p1f2_gn_200101.nc test.nc Climate...
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CDO - Support: Optimal operator order?
Hi. Me again... In the following command line what is the optimal order of cdo commmands?cdo -O -a -f nc4 -z zip --cmor \ -intlevel,50 \...
View ArticleCDO - Support: RE: Optimal operator order?
Hi ralf!The files are much too big to upload, but here are some download links for your pleasure! Each file is...
View ArticleCDO - Support: RE: Optimal operator order?
Thanks ralf! It looks like the correct answer to my problem is to uncompress these large files that were sub-optimally chunked by their creators. I wonder if I have enough disk space...
View ArticleCDO - Support: RE: selregion fails on CMIP6 GISS ocean grid
Thanks Uwe. The region file works for all other CMIP6 ocean grids I have tried. I changed the polygon orientation but selregion still fails on the GISS-E2-1-G grid. (And if I may be so bold I would...
View ArticleCDO - Open discussion: Clarification for sellonlatbox
Hi again (cdo 2.0.4),The docs for sellonlatbox state the field must be "rectangularly understood". But the source for Selbox.cc indicates the command operates on all grid types. Could you please...
View ArticleCDO - Open discussion: RE: Changing Dtype from F to I?
I am uncertain whether cdo can do this. You might want to try the ncpdq command from NetCDF Operators(NCO) [http://nco.sourceforge.net/].
View ArticleCDO - Open discussion: RE: Changing Dtype from F to I?
Oh... and for cdo and you might also try changing your missing value to something representable as I16. 1e20 is of course going to fail in translation to a sixteen bit integer, right? . Try cdo...
View ArticleCDO - Support: RE: cdo remapbil creates missing values when regridding CMIP...
You can use remapdis but make sure you correct the direction of your interpolated velocity vectors which is still relative to the model grid, not relative to geographic coordinates.
View ArticleCDO - Support: RE: Optimal operator order?
I am discovering that most of the CMIP6 ocean model datasets are chunked in this way. Blech...
View ArticleCDO - Support: RE: Optimal operator order?
"Blech" for me comes from comic strips. "Blech" is the noise a comic book character might make when expressing disgust with a situation, perhaps with tongue stuck out like they ate something that...
View ArticleCDO - Open discussion: Strange result from info command
$ cdo info zos_Omon_IPSL-CM6A-LR_ssp126_r2i1p1f1_gn_201501-201503.nc -1 : Date Time Level Gridsize Miss : Minimum Mean Maximum : Parameter ID 1 : 2015-01-16 12:00:00 0 120184 0 : 16.000 4.2513e+09...
View ArticleCDO - Support: Setting all values except one to NaN
Hi everyone!I am having difficulties with what should be a simple problem.I want to convert my netcdf to a binary mask. I want to replace all values of mmask with NaN, except for 4. I then want to...
View ArticleCDO - Support: RE: Setting all values except one to NaN
Danke, Karin! :)The elusive double parenthisis parenthesis...
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CDO - Open discussion: Interpolation across 180 degrees.
Hi everyone!I have a somewhat complicated question if everyone is not on summer vacation. I must remapcon interpolate from several CMIP6 ocean curvilinear grids onto a custom curvilinear grid. The...
View ArticleCDO - Open discussion: RE: Interpolation across 180 degrees.
Thank you Estanislao. Much appreciated.
View ArticleCDO - Support: Easily getting number of rows and columns (nx and ny)
Hi Everyone. I hope you are all well.I am using selindexbox to remove the first and last columns and rows from a dataset (or an arbitrary window frame). Using bash I can parse the output of a cdo info...
View ArticleCDO - Open discussion: RE: Operator to fill in missing values using...
Another comment. Rectilinear lat-lon grids that include 90N/S (as a center point of a grid cell) are a very bad practice, although they are still commonly used.
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CDO - Support: RE: Easily getting number of rows and columns (nx and ny)
That would be great Uwe. Will you start counting backwards from 0 or -1? Joking...
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CDO - Support: remapcon limitations
Hi all,I need to find the truth about the limitations of the remapcon command. I have abused this command to generate the area-weighted mean over polygons. In this thread...
View ArticleCDO - Support: RE: remapcon limitations
Hi ralf!I have attached all four of my target grids. Each is a single grid cell (polygon) in SCRIP format. As for the source grid, the source grid could be any of the CMIP6 ocean grids. I will provide...
View ArticleCDO - Support: RE: remapcon limitations
Hey ralf,Yes. That is what I am doing, and your selregion command is what I might have to do in the future. I have concerns the selregion command might end up as a debugging exercise, because of the...
View ArticleCDO - Support: RE: remapcon limitations
ralf,thanks so much for all your time on this. I had a bad feeling that the correct answer would be to break my existing polygons into a triangular mesh, which is really far too much work for the...
View ArticleCDO - Open discussion: cdo command line and null character
Hi all,I recently posted this question [https://unix.stackexchange.com/questions/722215/empty-string-breaks-command-line] on a bash forum. I was wondering if the cdo team would consider adding an...
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CDO - Open discussion: RE: cdo command line and null character
Thanks Karin. I am now thoroughly embarrassed (yet again) and bash'ing my head against the wall. But at least I have the simple answer.
View ArticleCDO - Support: RE: cdo remapbil creates missing values when regridding CMIP...
Hi Marga,You need to correct them before interpolation. I suggest you contact the each modeling group and ask them for help. They should be able to give you a netcdf of the rotation angles.You can...
View ArticleCDO - Support: RE: cdo remapbil creates missing values when regridding CMIP...
You might want to take a look at ESMPy [https://earthsystemmodeling.org/esmpy/]. This old thread [https://github.com/DamienIrving/ocean-analysis/issues/6] gave me this suggestion. If you scroll down to...
View ArticleCDO - Support: RE: transfer uv fields from rotated grid (NEMO) to regular grid
Hi Guys!Thanks for sharing your results. I keep trying to spread the message (cdo, CF-metadata, esmvaltool, et cetera) that a tool is needed for this purpose. I think the hot spots near your coastline...
View ArticleCDO - Support: RE: transfer uv fields from rotated grid (NEMO) to regular grid
Just found and might be worth a look: [https://xgcm.readthedocs.io/en/latest/index.html]Edit: Does not do vector interpolation/rotation
View ArticleCDO - Support: RE: cdo remapbil creates missing values when regridding CMIP...
Just found and might be worth a look: [https://xgcm.readthedocs.io/en/latest/index.html]Edit: Does not do vector interpolation/rotation
View ArticleCDO - Support: RE: transfer uv fields from rotated grid (NEMO) to regular grid
Thanks so much Estanislao. The elephant is still in the room with respect to Arakawa u and v grid offsets. I keep waiting anyone to provide the proper tools for these transformations. I used to have a...
View ArticleCDO - Support: RE: transfer uv fields from rotated grid (NEMO) to regular grid
Have gcost and gsint always been available in the NEMO mesh mask file? I can't recall.
View ArticleCDO - Support: Help getting n47 Guassian grid that matches NCEP/NCAR...
Hi all,I am trying to generate a grid that matches the Gaussian n47 grid used for the NCEP/NCAR Reanalysis. I need to generate interpolation weights to this target grid (but only for the northern...
View ArticleCDO - Support: RE: Help getting n47 Guassian grid that matches NCEP/NCAR...
Danke Uwe. setgrid it is!
View ArticleCDO - Support: RE: cdo remapbil creates missing values when regridding CMIP...
Hi Marga,If you would upload a sample file (perhaps with a single time slice. I always use cdo seltimestep,1 infile outfile) it would help diagnose.The sethalo command can do what you want.cdo...
View ArticleCDO - Support: RE: cdo remapbil creates missing values when regridding CMIP...
Great! [Two dew claws(i.e.dog's thumbs) up!]
View ArticleCDO - Support: Adding a CF-Metadata region variable
Is there a cdo path for creating a CF-Metadata region variable type? (i.e. an ancillary character...
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CDO - Open discussion: RE: GFS and ml2pl
Hi Nick. I doubt it. However, without an uploaded sample file (i.e. use cdo seltimestep,1 infile outfile), no one can help you with this question. (FYI: The first google for GFS (for me) is "Gordon...
View ArticleCDO - Support: Determining the number of samples used in fldavg
Hi Everyone,I need to find the number of valid samples used by the fldavg command. (Background: I am running the selregion command on CMIP6 ocean model data and need to know the total number of valid...
View ArticleCDO - Open discussion: RE: sethalo - comment and bug
This is a great idea, but will it still accept the old interface i.e. backwards compatibility?
View ArticleCDO - Open discussion: Using two operators with variable input without using...
Hi there! I am using cdo 2.1.0. I am missing a very obvious syntax error... :( $ ls /home/brendan/d1/cmip6_data/680/ACCESS-CM2/raw/past/tos_Omon_ACCESS-CM2_historical_r1i1p1f1_*.nc...
View ArticleCDO - Open discussion: RE: Using two operators with variable input without...
Hi Karin,It gives me the same error:$ cdo -O -a -f nc4 -z zip --cmor -setattribute,dfo_creation_date=2023-03-06T16:51:24+00:00 -fldmean -selregion,polygon_gomss_subarea_gom.txt -selname,tos...
View ArticleCDO - Open discussion: RE: Using two operators with variable input without...
The same command line works with cdo 2.0.4 :(This is very confusing since selregion is not (officially?) introduced until 2.1.0
View ArticleCDO - Open discussion: RE: Using two operators with variable input without...
Please ignore. It works when I get rid of the copy command.
View ArticleCDO - Open discussion: selregion dropping lat/lon bounds
(cdo 2.1.0)Hi everyone,I was trying the following:$ cdo -fldmean -selregion,polygon_gomss_subarea_gom.txt -selname,tos tos_Omon_GISS-E2-1-G_historical_r1i1p1f2_gn_193101.nc test.nc cdo(1) selregion:...
View ArticleCDO - Open discussion: RE: selregion dropping lat/lon bounds
Thanks so much, ralf! Hope all is good.
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