I have a large netcdf dataset which has two dimensions – ‘time’ and a single spatial dimension ‘x’. There is also a ‘lat’ and ‘lon’ coord for each ‘x’. This needs to be mapped onto a global half degree 2D grid, such that the dimensions are R…
Tag: netcdf
Efficient way to extract data from NETCDF files
I have a number of coordinates (roughly 20000) for which I need to extract data from a number of NetCDF files each comes roughly with 30000 timesteps (future climate scenarios). Using the solution here is not efficient and the reason is the time spent at each i,j to convert “dsloc” to “dataf…
Merge 3 Arrays 2D arrays Dimension Wise to make a 6D array
so I have three Arrays of dimension (1949, 2649) When I do I get (3, 1949, 2649) However I actually want shape (1949, 2649, 1949, 2649, 1949, 2649) instead Answer
Average a Month’s worth of NetCDF data to one 24hr-day to give the mean diurnal cycle
I hope you’re well — I have multiple files all having one month of hourly data. Below shows the dimensions I want to average each individual files in a way to calculate the hourly average to get the diurnal cycle for each month with array shape (time, lon, lat) of 24 steps. Answer
How to avoid unsupported .nc file while reading from different directory
I have several folders in a directory containing .nc files. While reading, I am getting an error: NETCDF can not read unsupported file Since there are more than 5 thousand files, I don’t know which file is corrupted or unsupported. Is there any way to read files by jumping into another supported file? T…
Getting very slow iterations in a loop run over a Datarray using Xarray and Dask
I am trying to calculate windspeed from u and v components for 1 year data at hourly timestep and 0.1 x 0.1 Degree resolution for a total of 40 years. The individual u and v netcdf files for 1 year is about 5GB each. I have implemented a basic for loop where the u and v netcdf files for each
How to make a sum in NetCDF4 by xarray
I would like to make a monthly sums of my NetCDF4 file from daily values for precipitation. However, I am quite not sure what I am doing wrong. It seems that something has changed from the code in this post: Sum a daily time series into a monthly time series with a NaN value threshold I didn’t find anyt…
Calculate yearly anomalies for several years on netcdf files in python
I need to calculate monthly, seasonal and annualy anomalies of air temperature of netcdf monthly files of 44 years with some function that allows me to obtain anomalies in the period on a monthly, seasonal and annualy automatically and save the results in a folder. I only know how to do It for one year and no…
Creating a nested dictionary from a flattened dictionary
I have a flattened dictionary which I want to make into a nested one, of the form I want to convert it to the form The structure of the flat dictionary is such that there should not be any problems with ambiguities. I want it to work for dictionaries of arbitrary depth, but performance is not really an issue.…
Calculating monthly mean from daily netcdf file in python
Hello I have a netcdf file with daily data. Shape of the file is (5844, 89, 89) i.e 16 years data. I tried to get monthly average from daily data. I am looking for simillar to resample function in pandas dataframe. Is there anyways to do that in python. As I know it is very easy to calculate by using