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• Wrong results with the following statistical functions: * mean, *avg, *sum, *var, *std
  only if all of the following conditions are complied:
  - x86_64 machine (tornado, squall, thunder, lizard)
  - dataset has no missing values
  - the horizontal grid size is > 1 and not multiple of 8
  This bug was introduced in CDO version 1.5.6.

• Runstat: OpenMP parallelization over parameter nts
• import_binary: added support for 64-bit floats via extra OPTION keyword flt64

• Arith: added support for 3D masks
• mastrfu: use grid coordinates from input file

• ymonsub: added support for time bounds
• Wrong netCDF output for unscaled uint8, int8, int16, int32 variables [Bug #2516]

• netCDF: added support for environment variable NC_CHUNKSIZEHINT
• GRIB2: added support for level type HYBRID_HALF
• GRIB2: added support for grib_api key stepType with TSTEP_<type> in vlistDefVar()

• wrong netCDF output for unscaled uint8, int8, int16, int32 variables (bug introduced in 1.5.5)

In order to make the latest features available to users, a new release will be offered: cdo-current.

• There will be no support or maintenance for this release. We try to keep it stable, but it will not be tested like the official one.
• cdo-current will be released for new features or bug-fixes but not every night.
• It is a source-only release, pre-compiled binaries will not be offered.

Tar balls can be downloaded as usual from the download page

• yhouradd, yhoursub, yhourmul, yhourdiv: Multi-year hourly arithmetic

• ECA operators: wrong result if missing value is not the default missing value (-9e33)
• ml2pl: added support for GRIB2 parameter names
• replace: removed debug output

• Added single precision support: streamWriteVarF, streamWriteVarSliceF
• Added support for ZAXIS_DEPTH_BELOW_LAND units "mm", "cm", "dm" and "m"

Changed from old pycdf to more recent scipy.io.netcdf for returning numpy arrays (suggested by Alastair McKinstry).

See cdo.{rb,py}

Both versions now work with the win32 version of CDO and interfaces have converged a bit more.

See cdo.{rb,py} for installation instructions.

Updated libraries:

• netcdf-4.2
• hdf5-1.8.8
• grib_api-1.9.16
• proj4-4.8.0

The default unix installation now includes grib_api.

• setgridtype: added parameter lonlat to convert curvilinear to regular lon/lat grids
• remapcon: added env REMAP_AREA_MIN, to set the minimum area fraction

• timcovar: covariance over time
• fldcovar: covariance in grid space

• splitsel: added support for constant fields [Bug #1701]
• combination of selection commands (e.g. selmon -selyear) do not terminate, if no result found [Bug #1640]