CDO

• Changed to C++17
• Automatic download of ICON grid files has been disabled, CDO_DOWNLOAD_PATH must be set

• remabil: fix rounding errors on single precision float data [Bug #10809]
• remapeta fails with cdo version 2.0.5 [Bug #10663]
• Magplot: RGB parameter doesn't work
• setcindexbox: failed for rotated_latitude_longitude grids [Bug #10639]
• setgrid Segmentation fault [Bug #10632]

• yseasmean calculates seasonal sum for data with missing values since release 2.0.0 [Bug #10615]
• setattribute: delete attribute failed since release 2.0.0 [Bug #10612]
• atan2: wrong result since release 2.0.0
• Arith: Filling up stream2 by copying the first variable failed since release 2.0.0

• collgrid: process coordinates of generic grids
• read grid description file with x/y bounds failed for GRID_PROJECTION

• after: change computation of geopotential height from half to full levels
• gheight: change computation of geopotential height from half to full levels
• muldpm/divdpm: wrong result since release 2.0.0

• Arith: Filling up stream2 by copying the first timestep failed

• ECA indices: doesn't work correctly since 1.9.10

• Changed to C++14
• Changed to 3-clause BSD license
• sp2gp/gp2sp: OpenMP parallelized
• Expr: Add function cdeltaz(x)
• Select: Add parameter levrange (level range)
• seltimestep: Add support for negative values in range of integer parameter
• outputtab: Add key x and y to print coordinates of the original grid

• setgridcell: Set the value of a grid cell
• selcircle: Select cells inside a circle
• fldint: Field integral
• bottomvalue: Select valid values at the bottom level
• topvalue: Select valid values at the top level
• median - ensmedian, fldmedian, mermedian, zonmedian, gridboxmedian
• skewness - ensskew, fldskew, merskew, zonskew, gridboxskew
• kurtosis - enskurt, fldkurt, merkurt, zonkurt, gridboxkurt

• splitsel: Output sequence number starts at 0
• import_binary: Wrong result for swap 2 byte binary data
• import_binary: Set NetCDF reference time
• genlaf: Gives the result of gencon
• namelist: Add large file support

• Added option --ignore_time_bounds to ignore time bounds for time range statistics

• EOF: fix wrong result with multiple OpenMP threads (data race)
• timselmean: failed with variables on different grids [Bug #9978]
• Ymonarith: failed with variables on different grids
• Detrend: wrong result with parameter equal=false [Bug #9961]
• Fldstat: optional parameter weights failed
• Wind: check that numLPE is > 0

• New environment variable CDO_DOWNLOAD_PATH: Path where CDO stores downloads
• New environment variable CDO_ICON_GRIDS: Root directory of the ICON grids (e.g. /pool/data/ICON)
• splitsel: added support for negative skip values [Feature #9798]
• showattribute: added wildcard support
• Diff: added option maxcount=<num>: Stop after num different fields
• Select: added parameter dom (day of month, e.g. 29feb)
• Ymonstat: added support for option timestat_date

• Yearly arithmetic: yearadd, yearsub, yearmul, yeardiv
• apply: Apply an operator on each input file
• gh2hl: Interpolate 3D geometric height to height levels
• pack: Pack data (NetCDF attribute add_offset/scale_factor)
• verifygrid: Verify grid coordinates
• addtrend: Add trend
• isosurface: Extract isosurface

• intlevel3d: changed interface

• Selbox: wrong result of grid cell area (if present) on curvilinear grids
• sellonlatbox,-180,180,-90,90 "breaks" lon_bnds [Bug #9801]
• Ensval: does not work
• intyear: doesn't work; segmentation fault
• intlevel3d: wrong result since v1.9.4 [Bug #9468]
• dv2uv, uv2dv: wrong result works only on first level since v1.9.8 [Bug #9441]
• Vertintap: process only 3D variables on hybrid sigma height coordinates with correct number of levels
• Arith: Inconsistent missing value handling in v1.9.8 [Bug #9396]

New features:

• Proj 4 to 6 API Migration
• smooth/smooth9: Added support for gridtype PROJECTION [Feature #9202]
• Expr: Added function rand() and isMissval()
• Remap: Added support for Gaussian reduced grids
• trend, detrend: Added parameter equal=false for unequal timesteps
• Option --no_remap_weights: Switch off generation of remap weights

New operators:

• deltat: Difference between timesteps

Fixed bugs:

• ensavg: Wrong result if data contains missing values (same result as ensmean)
• Ydrunstat: Fix seg. fault