Cdo regrid. for i in $(ls); do cdo remapnn,grid2.
Cdo regrid nc. Below is the info of the two files. And I want to change the grid size to 67600 (260x260). However, as far as I can see, bilinear remapping will only take into account the four closest grid cells to the center of a grid cell on the new grid - which will result in a lot of data unused when the difference in grid resolution is large. If you want to regrid and interpolate a netCDF file with CDO, the easiest way (for me) is create a standard grid with the argument griddes. Documentation; FAQ; Downloads; Community; Please register yourself for reporting bugs or postings I'm using cdo to regrid ERA5 data from regular grids to polar stereographic grids. gencon operator for conservative remapping) apply the weights file with remap; avoid the extra step of generating a weights file and do both in ONE step (e. 0. 1. nc but I'm receiving the message: Warning (cdf_read_ycoord): Unsupported array structure, skipped variable thkcello! Warning (cdfInqContents): No data arrays found! Regrid error: Unsupported generic coordinates. (I would like to be absolutely sure I have the correct command, as later I will regrid these files - if I understand right, if I have a missing value that is numeric (e. newer versions try to keep most of the stuff in place. I'll try to 1. If your native grid changes during a simulation, My recommendation is to resample the original grid so that it is 0. I'll try to come cdo remapcon: Target grid area error: 1361 -0. Otherwise you can interpolate using the conversative remapping which means that you don't need to worry if the new grid is not a multiple of the old. png) and notice that there are some diffrence along the east coasts of southern pacific (near south American Continent). remove(fn) See the Github repo to access all files. nc is on a generic grid that cdo does not cdo remapcon,t511grid 20170101UV. RE: Regrid multiple netcdf files - Added by Ralf Mueller over 6 years ago hi Samantha! the question of optimization has multiple options. g. How to regrid population data (total not density) Added by Alexander Killick over 3 years ago. mpimet. for i in $(ls); do cdo remapnn,grid2. At least for me, the big pattern makes sense. I assume that we do a bilinear interpolation. Introduction TheClimateDataOperators(CDO)softwareisacollectionofmanyoperatorsforstandardprocessingofclimateandforecastmodeldata My goal: regrid oceanic grids to Gaussian T21 grids using the remapcon (remapcon needs to be used because other variables were interpolated this way). Side effects: a temporary file is created in current directory, then erased (name : climaf_tmp_grid). 01 basin. In order to maintain the information intact, I selected the -remapnn command assigning to the nearest neighbor in file2. For example: Regridding in CDO using Bilinear interpolation for Rectilinear Data Set I'm trying to regrid the variable thkcello using CDO: cdo remapycon,global_1 thkcello_Ofx_AWI-CM-1-1-MR_historical_r1i1p1f1_gn. Once I have the file with the monthly average, I regrid the file from 0. CDO is open source and released under the 3-clause BSD License (BSD-3-Clause). cdo remapbil,rotRegGrid. All values in the resulting file out. 25°×1. Shop the Data Store Instantly download parcel geometries & associated records, by county and state. nc > EN4_grid. py at master · oet808/PDO I am trying to regrid Time_Varying_Biomes. Added by Friedrich Burger 4 months ago. First you need to create a custom (CDO grid description file) I believe CDO can be used to replace "Fill Values/Missing Values" with NaNs. cdo remapnn,r1440x720 in. grb works. 44 If it is the correct grid file then you add the missing lat/lons to the data file by. If I do, e. grb` Cite Popular answers (1) Take Regrid property data wherever you go - available for web, iOS, & Android. Can someone provide some feedback on that? Also, I am completely oblivious on how to mask only the sea features. Add a regrid netcdf data to finer resolution in python. super cool answer, I'll for i in $(ls); do cdo remapnn,grid2. nc B_regrid. 75 and edge is -89. The difference is that the first is from atmospheric grid and the other oceanic. Especially if the data are on an unstructured and/or a large grid. Follow answered Jun 20, 2020 at 18:57. 45833 B_regrid. analysis. an ERA5 netCDF that is on a regular grid, how would I use cdo to regrid it to a polar stereographic grid (attached an example, being a netCDF of melt pond fraction)? (I believe the e. Improve this answer. regrid(coords, "nn") # Regrid and create netCDF files containing regridded variables. Warning (cdf_set_var): Inconsistent variable definition for XLAT! Warning (cdf_set_var): Inconsistent variable definition for XLONG! cdo remapcon,mygrid Afrange_tree_230224_a. nc were nan. Robert Wilson Robert Wilson. nc cdo chname,var165,u,var166,v uv_N320. Thank you for the I tried different methods to regrid this NumPy array to a regular grid but none of them worked, finally, I decided to use CDO, so I converted my 2D array to NetCDF file (myfile. 6. nc). nc ofile. My task is to regrid a file (curvilinear grid) to the grid of another file (horizontal). mkdir -p regrid for i in $(ls TerraClimate*. . r360x180 I need to regrid hundreds of netCDF files but when I used the CDO command in R, there is always a problem like this: cdo remapnn (Abort): Too few streams specified! Operator needs 1 input and 1 output streams. gr I am trying to regrid a Netcdf file using a specified list of longitude and latitudes. nc: sea-land mask file: RE: cdo setgrid - Added by Jaison-Thomas Ambadan over 11 years ago Daniel, Okay, I see the problem. nc cdo uv2dv uv. 0' I want to regrid using remapcon the data in SAFRAN_PR_19890101net3. 0) scripts to regrid data and correct CMIP6 data biases. nc masked_infile. but as I said the edge does not disappear. Then cdo remapbil to regrid the ORAS4 data to GODAS grid. I initially got another file which had my destination dimensions and then used cdo remapbil destgrid infile outfile. nc output. nc blom_sst_1x1d. 25deg resolution. CDO has very small memory requirements and can process files larger than the physical memory. -90 on left edge, center point be -89. 01 0. However, the output file is a global one. The most powerful implementation of regridding routines available for Python is, to my knowledge, the Earth System Modeling Framework (ESMF) Python The CDO (Climate Data Operators) command line program. cdo remapbil,r360x180 sst_data. nc, and zmksrf_pft. cdo -f nc -copy -setgridtype,regular uv_N320. Because it is population, I should aggregate (sum) population values for resampling data to a coarser resolution. cdo sinfo o. remove(fn) print ' Add_cdo_info_to_wrfout. RE: Regrid multiple netcdf files - Added by Ralf Mueller about 6 years ago hi Samantha! the question of optimization has multiple options. nc The grid of your input data needs to be properly defined in your input file (that is often a problem). 5), then you need to write a txt file to define regrid_2. 75 yinc=0. 25 degrees_north. How to update portion of the netCDF file? 0. Follow answered Dec 12, 2022 at 9:49. 'r144x144' type commands are redundant as they're meant for regridding to regular - any help would be most appreciated) Apart from that CDO can be used to analyse any kind of gridded data not related to climate science. nc basin2. Firstly, I tried to regrid the netCDF directly but it shows: $ cdo remapcon,grid. The oceanic grid is F32z grid type and don't have problem to interpolate to regular grid. nc) and COSMO output # convert shp to nc gdal_rasterize -of netCDF -burn 1 -tr 0. nc # Make difference between model and observation ncdiff -O blom_sst_1x1d. nc blom_sst. This means the uo/vo on the UKESM1-0-LL native grid is in My own solution was to 1) regrid the global netCDF file with the following command: cdo remapbil r4320,2160 B. The same horizontal grid must apply to all timesteps. Contribute to IsaakBM/CDO-climate-data-operators- development by creating an account on GitHub. where grid_corners_SAFRAN. Usually taking a higher number for parallel works good with IO-related calls (like yours). The latitudes are fine but The code consists of an NCL (version 6. This could involve temporal, vertical or spatial ('horizontal') interpolations. The xESMF Regridder features the parameter ignore_degenerate to deal with collapsing cells, but when using the patch or conservative methods, the halo would still When I have attempted to regrid Time_Varying doing the following: cdo remapbil,mygridtype Time_Varying_Biomes. 0 ocean output is different from the other CMIP5 models. nc); do cdo remapcon,r2160x1080 ${i} regrid/${i}WC. please find attached file. nc cdo (Abort): remapbil, gridfile. Thanks again, Ana for i in $(ls); do echo "cdo remapnn,grid2. nc sst_data_bil. The NCAR ClimateData guide has a nice introduction to regridding (general, not Python-specific). This is done with the remapbil operator via: cdo remapbil,myGridDef INPUT_FILE. Regrid a NetCDF file from a rotated grid to a geographical coordinate system. An example netCDF file is attached represent 1 month of daily data for total precipitation. Kind regards, Estanislao. CAMS file consist big area and HH_local_emission. , A. The following will work: cdo samplegrid,10 out. nc outfile. Another approach is to regrid all or selected variables and then save the regridded data to a netCDF file for later use. 875 degrees_east circular lat : -90 to 90 by 1. 7. I would like to use this text grid file information to regridding a NetCDF file (from ORAS5). How can I fix it？ Regrid curvilinear dataset. nc however I don't know if the remapcon is the best interpollation please help me to sort out where the mistake is in my regriding and advise which would be the best interpolation. txt', but I still got the problem: If you regrid your data to a coarser lat/lon grid using e. nc -setgrid,grid_corners_SAFRAN. 25. For example: This is not an R solution, but just to point out that you can use CDO to regrid netcdf files very easily from the command line in a linux/MAC OS environment. regridll is a CliMAF script that interpolates an object to another grid using CDO, a command-line tool for data processing. nc test. regrid will handle re-gridding emission data to WRF grids. Dani56 Dani56. nc RE: remapbil (Abort): Unsupported generic coordinates (Variable: cdr_seaice_conc_monthly)! and regridded(1_regrid. I'm having some problems with file (curvilinear grid) and not only with remapcon command but they might be connected. to rename the coordinate (dimension) variable names from ncl1, ncl2, ncl3 to time, lat, lon: hard to say without the input file and the CDO version you use. One of them is a generic grid (variables: sigma_bnds and zlev_bnds). txt ${i} regrid/${i}wgs. The following keywords can be used to describe a grid: gridtype STRING type of the grid (gaussian, lonlat, curvilinear, cell) gridsize INTEGER size of the grid xsize INTEGER size in x direction (number of longitudes) Regrid, from 0. But some things in my initial file Regrid netCDF files. cdo -remapnn,file2. Hi all, I have a curvilinear data set that has a gridsize of 9331200 (2160x4320). But, the issue is that after regridding using the following command: cdo remapbil,r288x192 data_2015_full. It seems to me that the cdo remap command is not able to handle the "generic" grid of this file. nc ^ To many inputs. 3. nc out2. Issue with cdo remapdis regridding tool; Regrid with nco; Regrid with xESMF; Regrid with xarray; Regrid with gridspec and sparselt; Crop netCDF files; Add a new variable to a netCDF file; Chunk and deflate a netCDF file to improve I/O; Prepare COARDS-compliant netCDF files; View related documentation; Help I think that is not a CDO problem. 25degree regular grid would be . # An array with all files that we will glue together in the end I tried to do that using CDO, using the REMAP function. cdo -remapcon,EUR-11_grid. nc File format: netCDF-1 : Institut Source Name Time Typ Grid Size Num Levels Num 1 : unknown unknown pr var F32 259200 1 1 1 Horizontal grids : 1 : lonlat > size : dim = 259200 However, in my current situation, I would want to regrid a dataset with Harvest Area as variable. The command should be cdo remapbil,infile1 infile2 ofile. 3,387 13 13 silver badges 20 20 bronze badges. I am using this command: cdo -O remapbil,grid_file_AQUA. cdo griddes target_grid. I have a population grid of 1/8th * 1/8th degree which displays total population per grid square, In CDO, the operator remapsum has been available since version 1. grb tmp. nc In this case, CDO offers both first and second order conservative remapping Regridding is the process of interpolating from one grid resolution to a different grid resolution. For example to regrid to 1x1 regular grid using bilinear interpolation as you ask, from a linux command line you would simply do: cdo remapbil,r720x360 in. The coordinate (dimension) variable names can't be changed by CDO but you can use NCO's ncrename to do it. This operator has the status experimental. txt. nc # regrid cdo remapbil,infile. I failed to regrid this data, so I tried to add the coordinates and missing_value following the suggestion by Ralf: cdo -setattribute,sithick@coordinates = "clat clon",sithick@missing_value = 9999. cdo -setgrid,regrid CAS-44_oro. nc cdo setgrid,targetgrid. I want all other values (other than this This means that the CDO remap operators apparently regrid per-area. There are more than 600 operators available. In this case the interpolation process can be split into two parts. older versions only took over the CF-compliant attributes. cdo sinfon /ankit For example, regrid the data of mrsl. Follow answered Jun 12, 2021 at 17:36. 01, and then regrid to 0. Does the directory regrid already exist? If you do a $(ls) directories will be used too, so it would be better to list only the relevant files with $(ls TerraClimate*. 0174829 anyway I did change the variable from siconc to siconca. nc; done or You can solve this in Python using my package nctoolkit, which uses CDO as a backend. These interpolation weights can be reused for every remapping process with I am using the below command to regrid ncfile. f. nc cdo remapcon (Abort): Source grid cell corner coordinates missing! CDO uses the PROJ library to calculate geographic coordinates from a projection. regrid#. The xESMF xarray extension (based on the Earth System Modelling Framework). The module emiprep. This time I am attaching one month of data in the three possible formats/grids that I can obtain the data. 1 to 0. 265 4 4 silver badges 13 13 bronze badges. nc (148 KB) slm. To get more information about the grid you can use the sinfo operator. nc > myGridDef myGridDef is a text file. grb has : lonlat : points=27840 (192x145) lon : 0 to 358. How can I reduce CDO is a collection of command line Operators to manipulate and analyse Climate and NWP model Data. It successfully done. % cdo -griddes -topo,t62grid # # gridID 1 # gridtype = gaussian gridsize = 18048 xsize = 192 ysize = 94 xname = lon xlongname = "longitude" xunits = "degrees_east" yname = lat regrid to lonlat then anomaly, normalization and interpolation - ORAS5/cdo_regrid_1958_2014. 5 CDO grids The CDO grid description is an ASCII formatted file. However, when I tried to use -eof or -remapbil on the same . I noted that remapcon it's so I need to regrid some NetCDF files, so I've tried to do it with cdo and cf modules, but everything failed. This article explores the process of regridding NetCDF files to a desired template resolution, focusing on its relevance in WRF chemistry and earth science. 5 deg to 0. nc SAFRAN_PR_19890101net3. -120, where a later check I am using daily data to calculate monthly averages using ensemble_mean. Conservative regridding is more You can fully customize how to regrid DWD grib data by first creating a CDO grid description file and then genrating the interpolation weights. nc And then I got: U-wind and V-wind not found. Errors when regridding MPI: cdo remapcon,grid. 05deg CDO/NCO I have two . Here is an example: cdo remapbil,r360x180 -selname,thetao ifile ofile cdo remapcon - can it be used to simply regrid an unstructured grid? Command-line operators for netCDF and HDF files Brought My SixPointsOnly. nc) and tried to apply: cdo -remapnn,gridfile. Modified 4 years, 2 months ago. nc Interpolation between different horizontal grids can be a very time-consuming process. cdo -remapnn,global_1 -selname,cdr_seaice_conc_monthly infile. nc #for regridding. grb mrsl. I would like to transform those coordinates to regular lat/lon coordinates. generic means CDO does not find geographic coordinates for that grid. The data to resample is the ERA5 monthly dataset, in this case the total precipitation. 1)cdo -info filecurvilinear. ncl: An example of using g2gsh, which interpolates from one gaussian grid to another using spherical harmonics. 05 degree PFT file, so that I have high resolution LAI data. The problem is the final grid product does not exactly align with the target netCDF file, i. This is my netCDF file info: File format: netCDF -1 : Institut Source Ttype Levels Num Gridsize Num Dtype : Parameter name 1 : unknown unknown instant 1 1 180 1 I16 : tp Grid coordinates : 1 : lonlat > size : dim = 180 nx = 12 ny = 15 longitude : first regridll : regrid an object to a lat-lon box of a CDO regular grid I have a NetCDF file, let's say only a portion of South America as mentioned in the link below. grb to the same grid as hus. nc infile. Using the EN. The regridding can be done with one command line of CDO. I am completely new to CDO and I have tried a lot of solutions on this forum and elsewhere, but it for i in $(ls); do cdo remapnn,grid2. commands Regrid netCDF files The following tools can be used to regrid netCDF data files (such as GEOS-Chem restart files and GEOS-Chem diagnostic files. Hello, I have a Cordex NetCDF file with rotated pole coordinates. nc result. However, I could not do it. nc vo_Omon_UKESM1-0-LL_ssp370_r3i1p1f2_gn_210001-210012. nc gx1_forcing. 5deg_1971-2000_pr. nc HH_local_emission_regrid. 9 PIOMAS1979. py at main · HalKiyo/ORAS5 cdo remapcon,r1440x720 a. I tried CDO, and also ncremap, but did not work. If you want to rename a coordinate variable so that it remains a coordinate variable, you must separately rename both the dimension and the variable. Benjamin T. E. nc But when I checked the generated data using panoply, I realized that there are missing values on Greenland which should not be existed. nc so that I can replace print ' Add_cdo_info_to_wrfout. 0,-52. txt will be something like If I have e. I want to regrid population data from 0. 2. Thanks again, Ana I failed to regrid this data, so I tried to add the coordinates and missing_value following the suggestion by Ralf: cdo -setattribute,sithick@coordinates = "clat clon",sithick@missing_value = 9999. If I would do, I'd take conservative rempping. Here is an example: cdo remapbil,r360x180 -selname,thetao ifile ofile cdo remapcon,r1440x720 a. nc Then I regrid 't. nc HadISST_sst. cdo sinfon /ankit/mrsl. nc Hi all, is there a good way to use CDO for regridding from a high-resolution grid to a low resolution grid? I often use remapbil. The regrid operator in CDO can handle spherical harmonics grids, Gaussian grids, or longitude/latitude If you regrid your data to a coarser lat/lon grid using e. 2) script to compute non-linear trends and a few CDO (version 1. Documentation¶ The CDO User Guide is available as pdf and html. nc") # define coords you want to regrid to coords = pd. CDO homepage: https://code. txt inputfile. For example, the following CDO command can interpolate input data (time,lev,lat,lon) to a 1. Additionally, many GIS packages such as ArcGIS, QGIS, and GRASS also have the ability to regrid (remap) NetCDF Using CDO to regrid from a high-resolution grid to a low resolution grid. I've attached the sea-land mask. nc after regrid. 50° pixels. 5 degree LAI file into 0. Thanks for the help. 0 and tried to regrid cdo -f grb -divc,10 -subc,0. Firstly the generation of the interpolation weights, which is the most time-consuming part. Thank you in advance Regridding in CDO using Bilinear interpolation for Rectilinear Data Set RE: cdo regrid problem with CMIP5 thetao data - Added by Guanhuan Wen about 8 years ago Afterward, I found that the format of INMCM4. for regular grids, CDO can compute them internally. It takes a dataset, a target grid name, and a lat-lon box as inputs, and If you want to regrid and interpolate a netCDF file with CDO, the easiest way (for me) is create a standard grid with the argument griddes. nc (498 KB) 20170101UV. cdo remapcon,CAMS_Indore_NMVOC. In CDO, the operator remapsum has been available since version 1. nc out. Cheers! /Joakim. To apply a regridding you will need a set of weights mapping from the source grid to the target grid. For emiprep, this means that we have to first convert from per-gridcell to per-area, and then regrid using cdo remapcon2. There is no documentation yet and the name may change in future versions. However, I met following warning and an error: cdo remapbil (Abort): Unsupported generic coordinates (Variable: U)! I am using the below command to regrid ncfile. I wonder how I can regrid the precipitation data into 1x1 and 3x3 resolution respectively using interpolation method such as Kriging or inverse distance weighted (IDW). bilinear interpolation, this will result in a smoother field. 9. We will give an example to illustrate how to regrid data with CDO in an updated pdf file (graphic_guide_MVIETool. nc t. The regrid operator in CDO can handle spherical harmonics grids, Gaussian grids, or longitude/latitude I want to regrid using remapbil, and I realise that there are several standard options for the grid available in cdo, such as global_1 for a 1x1 lon-lat grid. ECMWF), you can use cdo to convert NetCDF file to Grib file `cdo -f grb in. txt: _tests_regrid_data % cdo remapbil,gridfile. remapcon for convervative remapping) the first option is preferable if you want to interpolate multiple files, cdo gridboxmean,n,m in. I can use some of the cdo operators such as -info and -griddes. I'll try to come I was trying to regrid the data that I have from WRF outputs. Lets wait for karin or ralph. nc File format : NetCDF -1 : Institut Source T Steptype Levels Num Points Num Dtype : Parameter ID 1 : unknown unknown c instant 1 1 136192 1 F32 : -1 Grid coordinates : 1 : projection : points=136192 (304x448) mapping : polar_stereographic x : -3837500 to 3737500 by 25000 m y : -5337500 Regridding is the process of interpolating from one grid resolution to a different grid resolution. You could also duplicate Charlie's conversion approach using cdo, but because your gridbox sizes (before/after) are an integral multiple of each other ah, ok. nc file is an example of an 'unstructured grid'. And the CDO version is 1. 20170101UV. 1 degrees. nc Warning (cdf_set_dim): Inconsistent dimension definition for lat! dimid = 0; type = 3; newtype = 2 cdo griddes FILE_WITH_TARGET_GRID. 10. Added by Bamidele OLORUNTOBA about 5 years ago. There is no documentation yet and the name may change in future Now in CDO there are some options like bilinear (remapbil) and bicubic (remapbic) interpolation. The option you need is remapdis, if the file is . txt -setmissval,-32768 test_1. which has 3d by default, can run: $ cdo remapcon,r360x180 ifile ofile % this function makes 360 columns and 180 rows based on the lon and lat of your input file. If you prove both I can say more. I wonder is there any method to convert it to the region I want with gaussian grid? Many thanks, Delei. References. In a script file you can do e. nc OUTPUT_FILE. nc > targetgrid. nc # mask cdo ifthen basin2. I tried with cdo version 1. RE: convert netcdf file from polar stereographic to lat/lon - Added by Karin Meier-Fleischer about 2 years ago # Regrid data ncks -A-v plat,plon grid. 25 degrees using another file as the target g climtas. nc (which has a 1º of spatial resolution) I will create a standard of 1ºx 1º. 05x0. Thanks. However, I have not found anything like this in this forum and I do not even know if this is possible or not I was trying to regrid and do eof by cdo operators. Only for nested domains. grid function in but it only uses break length or number of coordinates rather than specific ones. Supported data formats are GRIB 1/2, netCDF 3/4, SERVICE, EXTRA and IEG. g10. CDO remapcon seems to handle multiple time steps just fine. nc B_regrid_subset. However, the time dimension needs to be named time. e. First you need to create a custom (CDO grid description file) If you know how to redefine variable and Institution (e. 25 to 0. eg. if resample 1deg map from 4by5 map, by default the center is -89. The best solution is to use the proj_param attribute to specify all the necessary IMO it sounds awkward to interpolate the area of each grid cell to another resolution, because it's wrong in the new grid. 75 xinc=0. nc hus. uo_Omon_UKESM1-0-LL_ssp370_r3i1p1f2_gn_210001-210012. Modified 4 years ago. I tried to do the regrid but it did not work. Added by Ghaith Ben Hamouda over 4 years ago. My aim is to use the time-varying biomes labelled 16 and 17 to extract fgco2 values from the observational data. nc",output="out. From your description it sounds as if you want to use nearest neighbour interpolation, which for a 0. But, the resultant netCDF have values from -300 to 300. csv cordex. nc outputfile. Currently, only regular lonlat grids are supported as targets. Could you give me some This means that the CDO remap operators apparently regrid per-area. Regrid with cdo. Regrid with cdo cdo includes several tools for regridding netCDF files. [pmdtest@pmd CRU]$ cdo sinfov GLOBAL_CRU_CTL_CRU-TS31_MM_0. I used cdo remapcon in order to conserve the mass of my variables and the output netCDF file looks promising so far. 8. Here is the output of the surface velocity. 25° grid points to calculate the new value of the 1. I was wondering if there is a cdo command that can remap this "generic" grid to a regular grid. nc tmp. nc > mygrid cdo remapbil,mygrid ERA5. 125km to N6. nc the value in file1. Most of the following examples show: (a) how to generate the weights needed to regrid variables; (b) apply the weights to a variable and (c) generate a plot showing the original and regridded variable. There are many ways and options it seems to do this. nc consist of small area. I was trying to regrid and do eof by cdo operators. You can use the CDO operator sinfo or griddes to check the grid information of the source grid. I want all other values (other than this Hi, I am trying to regrid a very high resolution(4Km) file to a coarse resolution say to 100 Km. nc The second file contains missing My next step was to generate a text file with the grid information of the AQUA/Modis file through the command: cdo griddes file_AQUA. txt file_ORAS. If the result is not correct or there is no grid information available (gridtype: generic) then you 本文简单介绍如何使用cdo对GCMs数据进行regrid。 从ESGF网站下载的CMIP6数据是全球的，如果我们要对全球的数据进行regrid，使用cdo来操作非常简单，比如只需下面一行代码即可将数据regrid到1° x 1°的网格上: 上面的 I have a few hundred NetCDF files that I need to regrid. Now my problem is about what is the best way, if remapcon or remapbil. 5; If you desire to define the edges exactly as you need (eg. It is a common grid description for all available grids. Since the file is quite large, I am providing a link to my dropbox. There appears to be no way to have different horizontal grids at different timesteps. Note the curly braces rather than brackets, the use of i, and the addition of an output directory in the output file, which prevents cdo trying to regrid already regridded files. 50° grid points? In that case, these methods are not sufficient since the resolution is 12 times bigger. py: Add necessary information to the WRF output, so that the coordinate system (LCC) can be recognized by CDO `cdo sinfo`. grb using interpolation method bilinear and do the merge: cdo remapbil,hus. Working with CDO . CDO found 5 data variables on 3 different grid types. d03_30s. nc (attached). 4 but was not for i in $(ls); do cdo remapnn,grid2. In this case, I believe it would make sense to use instead an additive operation (Ex: If two adjacent cells have respectively 100 and 200 hectares, the result would be 300 instead of 150). like in the DWD document: create the weights file (e. I have seen that there is an akima package with a bilinear. grb uv_N320. xvals/yvals describe the positions of the 6x5 quadrilateral grid cells. Hi all, is there a good way to use CDO for regridding from a high-resolution grid to a low resolution grid? I often use remapbil. Ask Question Asked 4 years ago. 25° longitude-latitude grid and 14 # Regrid the data for method in method_list: ds_out [method + "_tos_mask"] = regridder The CDO operator verifygrid is very useful in detecting duplicated and collapsing cells. 5 -setgrid,ICMGGECE3INIT -random,r40320x1,1 random_O96. nc Rotate vector from model i,j direction to zonal and meridional directions. cdo remapcon,new_grid_specification in. txt myfile. Maybe, we are missing something. nc TVB_rg. slm. 05 degrees to 0. nc new_file_ORAS. My issue is that the Time_Varying_Biomes. This method is based on a post by Stephan Hoyer. shp basin. nc (attached) to the same grid type and resolution as the observation dataset fgco2_obs. nc LAI_2020_all_regrid. Is it true that they only use respectively 4 and 9 surrounding 0. 01 by 0. RE: Remapping from regular grid to gaussian_reduced (cubic-octahedral) - Added by Guillaume S about 4 years ago Hello, I use Python scripts for analysis of climate model data: Pacific Decadal Oscillation (PDO) - PDO/regrid_cesm_lens. Implementation: standard CDO calls (griddes and remapgrid) CDO may need particular NetCDF attributes to be in the file for this to work. These files are needed to run or pre/postprocessing the GFDL model. 2 I have attached the relevant files. with CDO you can to interpolation in two way. 25km. I want to interpolate the 0. For example: I have a dataset from MEaSUREs Calibrated Enhanced-Resolution Passive Microwave Daily with different resolutions - N3. 05deg CDO/NCO. and then 2) spatial subsetting (or CDO equivalent): ncks -d lon,-141. cheers REGRID - input Popular options include CDO (Climate Data Operators) and NCO (NetCDF Operators). The most powerful implementation of regridding routines available for Python is, to my knowledge, the Earth System Modeling Framework (ESMF) Python Regrid netCDF files The following tools can be used to regrid netCDF data files (such as GEOS-Chem restart files and GEOS-Chem diagnostic files. a custom method, wrapped as an accessor by xarray-regrid. 196001. Regrid a NetCDF file to match another without multiplication of pixels (CDO or R) Ask Question Asked 4 years, 2 months ago. from cdo import Cdo cdo=Cdo() cdo. In this case you have to select only those variables you want to interpolate. I can seemingly do that using cdo remapcon using the commands below, However Regrid# When we compare or analyze two datasets with different grid resolutions, or when we’d like to speed up computations or save RAM by coarsening the grid resolution, or when addressing model outputs, we may need to regrid the dataset. 372 1 1 gold badge 2 2 silver badges 7 7 bronze badges. de/projects/cdo. open_data("in. Maybe someone knows some other modules for this purposes or can help me to get rid of my errors. txt', but I still got the problem: Regrid# When we compare or analyze two datasets with different grid resolutions, or when we’d like to speed up computations or save RAM by coarsening the grid resolution, or when addressing model outputs, we may need to regrid the dataset. However, I met following warning and an error: Warning (cdfScanVarAttr): NetCDF: Variable not found - >XLONG_U Warning (cdfScanVarAttr): NetCDF: Variable not found - >XLAT_U Warning (cdfScanVarAttr): NetCDF: Variable not found - >XTIME I have a netCDF file which I would like to regrid to a coarser grid and a smaller area. Regridding weights can be generated online using ESMF_RegridWeightGen (esmf_generate_weights()) or CDO (cdo_generate_weights()), or offline by calling these programs externally (this is recommended especially for large grids, using I'm new with CDO. nc I am trying to regrid a Netcdf file using a specified list of longitude and latitudes. DataFrame({"lon":[0, 10, 20], "lat":[0, 10, 20]}) # regrid using nn ds. txt The grid description file gridfile. nc Share. 25° output are not used to calculate the 1. I also used the flag sethalo, but it did not help. 0. nc cdo -O merge tmp. 125km and N6. When I do "cdo sinfo" on the output after I did a "cdo setgrid" the info says the map was adjusted, but actually it isn't if I open the file in ncview or do a "cdo ifthen". nc sst_diff. mpg. nc the value in cdo remapbil,mygrid_d03 LAI_2020_all_lambert. nc > grid_file_AQUA. nc onto the CORDEX EUR-11 grid using the command. remapbil("target_grid",input="in. However, when I now try to regrid WRF (wrf_output. Dear all, I was trying to regrid the data that I have from WRF outputs. Area has been extended in HH_local_emission_regrid. Use cdo griddes to generate the grid of GODAS. The CDO documentation contains an example of how the bounds have to be encoded: Here is an example for the CDO description of a curvilinear grid. The first 4 values of xbounds/ybounds are the See the Github repo to access all files. nc? cat regrid gridtype = lonlat gridsize = 15453 xsize = 153 ysize = 101 xfirst = 10. a nc file to use the grid from; a regular grid specifier e. nc cdo remapbil,grid out1. nc cdo -z zip_6 -remapbil,grid_Michael. uploaded are conservative (con), bilinera (bil) and distance weighted fields. One thing I tried was to change the defualt _Fillvalue to 0. 4 KB) cdo_regrid. 4. txt NSIDC. you can can do inverse distance weighting remapping of netcdf files by simply calling CDO with a system command. It is possible to extract an arbitrary subset of the available data and/or interpolate the data onto a custom grid. txt -sethalo,-1,-1 siconc_SImon_MPI-ESM1-2-LR_historical_r1i2000p1f1_gn_185001-186912. Example 1: Create a CDO grid description file. grb You can fully customize how to regrid DWD grib data by first creating a CDO grid description file and then genrating the interpolation weights. So I removed the space between the remapbil, and gridfile. Code would be something like the following: import pandas as pd import nctoolkit as nc # load data ds = nc. Viewed 1k times I tried to do that using CDO, using the REMAP function. Please help me to regrid one or both at same grids. -128) and I regrid data, this could be regridded to e. 04167 -d lat,41. In the terminal type: cdo griddes EN. nc CDO found 5 data variables on 3 different grid types. nc where n and m are the numbers of points to average over in the lon and lat directions. Hence, some pixels of the 0. gr Regrid netCDF files The following tools can be used to regrid netCDF data files (such as GEOS-Chem restart files and GEOS-Chem diagnostic files. 1. CDO (Climate Data Operators): A collection of command-line I am trying to regrid a grid (netcdf file) with a lambert azimuthal equal area projection to a lambert conformal conic projection grid. I want to regrid it to a structured long/lat grid at 0. d0x. nc uv. nc cdo -O remapbil,global_1 blom_sst. nc file, cdo abort with the following message 'cdo (Abort): Unprocessed Input, could not process all Operators/Files'. Cheers, Feng. I want to use bilinear interpolation and although I have seen that CDO and NCO are helpful I want to implement this in r. 2. interpolate data. Dask-aware regridding. where infile1 is the target grid you want to map to and infile2 is the data you want to regrid. nc contains the grid corner lats and lons. Example: the actual interpolation is conducted using g2gsh_Wrap, a wrapper function that will assign all the appropriate meta data, including the gaussian latitudes, to resulting output. I can successfully use the following command in Cygwin to regrid a single NetCDF. However, as far as I can see, bilinear remapping will only take into account the four closest grid cells to the center of a grid cell on the new grid - cdo_regrid. Viewed 2k times 0 I have two . nc files: zmksrf_lai. Schwertfeger Benjamin T. If I use sellonlatbox to select the region I want, it becomes lonlat grid again. png: Spatial distribution of data: Replies (2) RE: Projection parameters on IMS Northern Hemisphere - Added by Karin Meier-Fleischer almost 2 years ago Hi Liren, without your files it is not really possible to help. cdo remapbil (Abort): Unsupported grid type: generic. and observations. I have received this error: cdo remapbil (Abort): Unsupported generic coordinates (Variable: MeanBiomes)! Has anyone experienced this issue before, and do you have any idea on how I can fix it? Regrid, from 0. cdo remapnn,grid2. Using the Can use command line and CDO to aggregate or resample entire NC files. And to make some calculations with the variables I need to resample/upscale data set from N3. tests_regrid_data % cdo remapbil, gridfile. I want to use a `cdo` operation `remapnn` to remap the NetCDF file from 0. 05 resolution. This page is helpful for describing regridding: Another way to access the cdo functionality from within python is to make use of the Pypi cdo project: pip install cdo Then you can do. It comes from Climate Data Operator (CDO). png (94. 125 by 1. txt infile. I can only say, when working with IMS data using Python that I had to use a different proj4 setting than described in the IMS User Guide. 44 yfirst=17. 0,83. pdf). nc' on the grid 'outgrid1. nc basin. nc") where target_grid is your usual list of options. I get the following messages: cdo griddes infile. Finally, we remove our temporary files: [13]: for fn in FN_SOURCE_ONES, FN_GRIDDES_SOURCE, FN_GRIDDES_TARGET: os. nc out1. The vertical coordinate is in sigma level, and I want to transform it to Z level now. - blackcata/Climate_Shell_scripts I use cdo remapbil,r360x180 to remap the following two files. nc Is regrid the grid description file of CAS-44_oro. nc dv. 25x0. nc HH_local_emission. nc"; done | parallel -v -j 4 If you want to combine this technique with the OpenMP switch -P be careful - it can slow down your system if you take to much. nc; done. Schwertfeger. I can generate a 40320x1 array of random numbers which has the same dimensions as the O96 reduced octahedral grid. nc the input and output files are exactly the same, as expected, so the target grid definition seems to be ok. However, I would like to make sure that the cdo function really worked as I hope it does and verify the mass conservation using python. At first, I am trying to create a scrip file and it gives the following error: cdo remapcon (Abort): proj error: major axis or radius = 0 or not given cdo griddes lambert_conf_file > gridfile. nc) to which I want to regrid my data LAI_2020_all. ' print ' Ver: 1. cdo remapbil (Abort): Target grid cell center coordinates missing! Could you please let me know what else should be specified in the below grid info to solve this problem? I attached the model file (geo_em. Added by Haochen Tan over 2 years ago. nc: Replies (3) RE: How to convert lonlat grid to gaussian grid - Added by Karin In some cases, it may be necessary to regrid NetCDF files to a specific template or resolution for further analysis or model integration. I am quite confused as to why is that happening. owh jiol tpxhl vnhjjvt khzeoo jtyps dpeqple gprwp adgb cltn