Problem
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You try to retrieve data from the ECMWF data archive in NetCDF netCDF format but the retrieval fails with this message |
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You try to retrieve data from the ECMWF data archive in NetCDF netCDF format but the retrieval fails with this message:
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- you request forecast data in NetCDF netCDF format
- your data request contains overlapping "time"+"step" specifications
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In this example you get two data values at the same validity time 2016-12-01, 15:00. The NetCDF netCDF format does not support multiple data values at a single time, hence the creation of the output NetCDF netCDF file fails, triggering the error message.
Solution
The solution is:
- Retrieve the data in its native GRIB format, which supports multiple data values at any one validity time.
Then convert the data from GRIB to NetCDF format using the grib_to_netcdf tool with the -T option. - Retrieve data for each forecast "time" separately, for example for ERA-Interim:
- first with time = 00:00 and all required steps
- then with time = 12:00 and all required steps
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