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Hello, I'm afraid I am not familiar with NCL, but you can use the `nccopy` command-line utility to convert a netcdf4 file to a netcdf3 file. This assumes that the data model (and data itself) contained within the nc4 file can be represented by a nc3 file, otherwise `nccopy` will report an error. I hope this helps! -Ward > Hi Sir, > I am familiar with NC data and I can use NCL to process NC data. > But I download netcdf 4 (nc4) data today. Could you please tell me how to > convert netcdf4 data to netcdf data? > Can it be done by using NCL? > > Thanks so much > Ning > > > > address@hidden > Ticket Details =================== Ticket ID: VBM-297666 Department: Support netCDF Priority: Normal Status: Closed =================== NOTE: All email exchanges with Unidata User Support are recorded in the Unidata inquiry tracking system and then made publicly available through the web. If you do not want to have your interactions made available in this way, you must let us know in each email you send to us.