Questions tagged [netcdf]
NetCDF (Network Common Data Form) is a self-describing data format developed by University Corporation for Atmospheric Research (UCAR).
31
questions
3
votes
0
answers
30
views
Handling large-scale climate dataset in R
I am analyzing ERA5 climate data spanning from 1950 to 2023, covering 73 years. The dataset has a daily temporal resolution and a spatial resolution of 0.25° (1440 x 720).
Each yearly data is stored ...
- 31
1
vote
0
answers
36
views
Why does this method for weighting grid cells result in tiny values?
I'm working with a bunch of netCDF files for uni, hence the for loop. Its global coverage data, and because the Earth is not flat, we need to weight the pixels/grid ...
- 111
1
vote
0
answers
29
views
How to make netcdf plots like panoply in C++
Im trying to make netcdf plots like what panoply does but i am not sure how to get this code
...
3
votes
1
answer
76
views
Correlation calculation of masked array:
I have a sea surface temperature time series, and I want to calculate the (Pearson) correlation coefficients among the nodes in the tropics (30.0N to 30S). In the time series, the land information is ...
- 33
1
vote
0
answers
194
views
How can I calculate integrated water vapor transport (IVT) in NCL, R or Python?
I have netcdf (ERA5) file (u and v component of wind and specific humidity) between years 1970-2022. Are there any package or script documentation about that?
- 11
1
vote
0
answers
10
views
Is there a standardized metadata attribute for describing which classification system is used for a (string) variable?
Suppose I have a variable that is a classification of something. In this example, it is a classification of soil texture:
...
- 428
3
votes
0
answers
200
views
Extract data from NetCDF file with tripolar projection for lat & long coordinates
I have coordinates obtained from Google Maps (latitude and longitude). I also downloaded a number of NetCDF4 files for different years and months that contain sea surface temperature (SST) from the ...
- 31
1
vote
0
answers
89
views
How to convert CORDEX netcdf data to be used for importing data to DHI Mike?
I have the CORDEX netcdf data and I would like to convert them to raw text file that can be used for importing data to DHI Mike.
To give more context, I have previously converted the ECMWF netcdf (...
- 11
3
votes
0
answers
96
views
Efficient way to find spatial extrema in 2-D space time netcdf field
I have a 2-D latitude-time zonal wind netCDF dataset (such as this small sample from ERA-Interim) from which I want to find all local maxima of the zonal wind as a function of latitude, for each time ...
- 151
5
votes
2
answers
1k
views
Python - How to write interpolated raster to netcdf file
Currently i am dealing with a bunch of coordinates (epsg:4326 => lat/lon) and their corresponding value (temperature). The goal is to write these coordinates and their values into a simple netcdf ...
- 151
3
votes
0
answers
218
views
Calculating layer thickness in python
I have calculated the $∂θ_\varepsilon/∂z$ with 'Height', 'Latitude', 'Longitude' dimensions.
...
- 31
1
vote
0
answers
53
views
How to specify a certain place in a (CDS) weather data query?
I am trying to get time series data for a specific place (latitude and longitude) for different weather elements from the CDS datapool. Therefore, I am using the cdsapi package and can run queries ...
- 111
10
votes
4
answers
385
views
Language to modernize a scientific Fortran codebase
Dear earth science community,
I am seeking a language to modernize a large Fortran project that works with geospatial NetCDF files.
The requirements for this language include:
A rock-solid NetCDF ...
- 213
3
votes
0
answers
44
views
What is the difference between the CF standard_names `platform_id` and `platform_name`
The two CF standard names platform_id and platform_name strike me as being redundantly similar. From their definition in the CF standard name table:
platform_id:
alias: station_wmo_id
A variable with ...
- 428
2
votes
1
answer
92
views
Storing borehole interval data (logs) in netcdf
I have a number of datasets that describe geological properties as intervals down a borehole (e.g. unit codes, sample results)
In a database, or a flat ASCII file, I would describe these with a ...
- 428
1
vote
0
answers
360
views
how can I write my netCDF file in my wrfinput_d01 format
I have a netCDF data file as my emmission data in netCDF format. I have interpolated it in my wrfinput_d01 resolution by using CDO. I can write my data to a netCDF ...
- 311
1
vote
1
answer
139
views
Temperature at 2 m MERRA2
I need MERRA2 data with Temperature at 2m.
I'm checking on https://disc.gsfc.nasa.gov/daac-bin/FTPSubset2.pl but I can't find this variable.
Suggestions where I can find them? Or anyone that did ...
- 77
1
vote
2
answers
472
views
WRF/Chem: Editing NetCDF (wrfchemi files) for own emissions
Does anybody here have any experience with editing wrfchemi outputs from the prep_chem utility so that I overwrite the file with my own emissions?
I am knowledgeable in python, but I am not that well ...
- 311
4
votes
1
answer
557
views
How to determine the orientation of coastline from NetCDF file
I have a NetCDF file (gridded data) with a landsea mask. I would like to determine, for the coastal grid-cells, what the orientation of the coastline is. I need to do this in order to calculate the ...
- 607
2
votes
2
answers
378
views
Huge netcdf files handling
Can any one help me to handle huge netcdf files each of 1gb memory in loop and at least 2 files at a time in ncl or linux or python or matlab.
for example era_interim daily pressure level datasets.
- 29
8
votes
1
answer
806
views
Regarding compression, shuffle filter of netcdf4
I read the doc but still have no idea about
what are the advantages to enable or disable the shuffle,
what level [0-9] of compression is optimal,
what's the best choice of chunk size?
- 243
3
votes
1
answer
2k
views
Adding time dimension and corresponding new variable to a netcdf file
I have created a x,y netcdf file and now want to add additional time energy variable. So that for each grid cell I have a energy time value.
My script is like this in Python:
...
- 31
6
votes
0
answers
102
views
Generating netCDF file composed of zeros?
I need to generate an all-zeros file as an input file for an Earth Systems model (DGVM) I'm using. I have a file with the same dimensions as the zero file. I have R and MATLAB and use a Fedora machine....
- 61
2
votes
1
answer
2k
views
How to prepare GrADS's .ctl file to convert grd file into .nc file in batch mode?
I have lots of grd (GrADS) file and I want to convert those data into netCDF file using cdo. The operation needs all the corresponding ctl file and I will have to prepare all these. So, my question is ...
- 141
2
votes
0
answers
78
views
Unable to read modis sst netcdf file in matlab [duplicate]
I'm using Matlab to read MODIS Aqua sea surface temperature data. Unfortunately I am not able to do it. It will be great if any of you can help me with that.
...
5
votes
1
answer
95
views
Digitalizing precipitation data from the image of weather map
I have a set of very old precipitation anomaly maps, from 1995-2006 for Brazil. The data of these maps, is to the best of my knowlegde, lost.
I would like to have them digitalized, ie, to NetCDF or ...
- 163
2
votes
1
answer
235
views
How to correct PSMSL data for GIA?
I have a PSMSL RLR (revised local reference) sea level dataset with records from various tide gauges. Can anyone explain how to correct them for GIA (glacial isostatic adjustment) using the ICE-5G ...
- 21
11
votes
1
answer
7k
views
Plotting wind barbs in python
I'm trying to plot wind barbs in basemap and I have two separate netCDF files.
Here is what I am trying to produce, or something like it:
How do I read a uwnd variable in a netCDF file in python?
<...
- 121
7
votes
1
answer
2k
views
How to read a NetCDF4 file in Matlab?
I have downloaded the sea surface temperature data from the Ocean Color website, the file is in NetCDF format and contains no of geophysical_data variables like sst,...
- 73
8
votes
1
answer
5k
views
CDL File Questions
I'm confused by what exactly a CDL file is and what its purpose is. Unidata specifies the syntax of such a CDL file in its netCDF documentation.
Questions:
Are CDL files designed to be opened by a ...
- 1,811
22
votes
7
answers
3k
views
What tools allow a quick comparison of NetCDF output from ocean models?
I am writing my own MATLAB scripts to do most of the visualization and data analysis of model results. I wonder if there is a quicker way for visual comparison of simulation results gained from ...
- 572