CDO

New features:

• added support for netCDF Scalar Coordinate Variables
• added support for hybrid sigma pressure coordinates following the CF convention
• added option --percentile to select different percentile methods
  Available methods: nrank, nist, numpy, numpy_lower, numpy_higher, numpy_nearest
• distgrid: added support for curvilinear grids
• collgrid: added support for curvilinear grids

New operators:

• remapycon: First order conservative remapping (new implementation of remapcon)
• genycon: Generate 1st order conservative remap weights (new implementation of gencon)
• setmisstonn: Set missing value to nearest neightbor
• setmisstodis: Set missing value to the distance-weighted average of the nearest neighbors
• ap2pl: Interpolate 3D variables on hybrid sigma height coordinates to pressure levels
• vertstd1: Vertical standard deviation [Divisor is (n-1)]
• vertvar1: Vertical variance [Divisor is (n-1)]
• seasvar1: Seasonal variance [Divisor is (n-1)]
• seasstd1: Seasonal standard deviation [Divisor is (n-1)]
• yseasvar1: Multi-year seasonally variance [Divisor is (n-1)]
• yseasstd1: Multi-year seasonally standard deviation [Divisor is (n-1)]

Changed operators:

• remapnn, remapdis: replaced scrip search by kdtree (optimization)
• vertvar, vertstd: changed to weighted var/std if layer bounds are available

Fixed bugs:

• cdo -t table_file does not complain if table_file is a directory [Bug #5891]
• expr: operators return 0 for arithmetics on constants [Bug #5875]
• env. CDO_TIMESTAT_DATE does not work [Bug #5758]
• splityear*: support for constant fields is missing [Bug #5759]
• yseaspctl: check of verification date failed [Bug #5810]
• Converting rotated lat-lon netcdf to/from grib: flip sign of the angle of rotation [Bug #5870]