CDO - Climate Data Operators

Current version is 1.4.0.1, released 21 October 2009

• What is CDO?
  
• Documentation
  
• Download CDO
  
• What's New in CDO?
  
• Mailing Lists
  
• Using CDO at ZMAW and DKRZ
  

What is CDO?

Documentation

• User's Guide (1.6 MB)
  
• Reference Card (0.1 MB)
  
• Introduction (0.1 MB)
  
• Brochure (0.4 MB)
  
• Online help with 'cdo -h operator'
  

Download CDO

What's New in CDO?

CDO Version 1.4.0.1

• Fixed bugs:
  
• seltime: bug fix for scanning of input parameter
  
• IEG format: bug fix for identification of lonlat grids
  
• GRIB format: bug fix for decoding of missing values (scalar version only)
  

CDO Version 1.4.0

• New features:
  
• Added support of time units 'seconds' to all operators
  
• New operators:
  
• Import binary data sets (via a GrADS data descriptor file) - import_binary
  
• Set valid range - setvrange
  
• Changed operators:
  
• gridarea: added support for hexagonal GME grid and tripolar MPIOM grid
  
• remapnn: added support for unstructured grids without bounds (full grid search)
  
• Seasstat: added env. CDO_SEASON_START to set the start month of seasons
  
• ieg format: added support for Gaussian grids
  
• Fixed bugs:
  
• shifttime: bug fix for negative time increments
  
• import_cmsaf: read native float datatype
  

CDO Version 1.3.2

• New features:
  
• Changed compiler to ANSI C99
  
• Added option -Q to sort netCDF variable names
  
• Changed operators:
  
• splitsel: changed the number of output digits from 3 to 6
  
• remapeta: correct humidity up to highest level *nctop* where condensation is allowed
  
• remapcon: change max_subseg from 1000 to 100000
  
• Fixed bugs:
  
• settaxis: bug fix for time increment 'months'
  
• remaplaf: fixed buffer overflow
  
• remapdis, remapnn: set num_srch_bins to 1 if REMAP_EXTRAPOLATE=OFF
  

CDO Version 1.3.1

• New features:
  
• The default calendar is now set to "proleptic gregorian".
  Set the environment variable CDI_CALENDAR=standard to use a standard calendar.
  
• Added support for Lambert Conformal Conic projections
  
• Added support for missval = NaN
  
• Changed operators:
  
• ml2pl: added support for Geopotential Height
  
• Settime: added support of "seconds" to operator "settunits", "settaxis" and "shifttime"
  
• percentile: change default number of bins from 100 to 101
  
• Fixed bugs:
  
• import_cmsaf: bug fix for datasets with gain/offset and more than 1 timestep
  
• remaplaf: bug fix for fields with missing values
  
• remapnn: bug fix for distance equal zero
  
• mermean: bug fix for weights from 'zonmean' (cdo mermean -zonmean)
  
• chlevel: fixed bug that happens when the list of oldlev,newlev contains the same level more than once
  

CDO Mailing Lists

• cdo-announce
  is a read-only low volume list for important announcements and new release information about CDO.
• cdo-intern
  is a read-only low volume list for announcements of new CDO installations at ZMAW/DKRZ.

https://lists.zmaw.de/mailman/listinfo/cdo-announce
https://lists.zmaw.de/mailman/listinfo/cdo-intern

Using CDO at ZMAW and DKRZ