CDO Changes

CDO Version 1.4.3

• New features:
  
• using CDI library version 1.4.3 (improved GRIB1 and netCDF support and performance)
  
• changed GRIB1 default packing type of spherical harmonics to complex
  
• Changed operators:
  
• remapcon, remaplaf: speed up by fast store of links
  
• replace: added support for time constant fields
  
• module Genweights: use netCDF2 (64bit) for large remap weights files
  
• module Zonstat, Merstat: added support for generic grids
  
• module Ensstat: don't overwrite existing files
  
• import_cmsaf: added more corrections for wrong projection parameter
  

CDO Version 1.4.1

• New features:
  
• using CDI library version 1.4.1 (improved GRIB and netCDF support and performance)
  
• New operators:
  
• splittabnum - Split parameter table numbers
  
• sethalo - Set the left and right bounds of a field
  
• Changed operators:
  
• merge, mergetime: don't overwrite existing files
  
• showtime: removed output of date, only print time string hh:mm:ss
  
• Fixed bugs:
  
• remap: bug fix for weights from gennn (set remap_extrapolate = TRUE)
  

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 Version 1.3.0

• New features:
  
• Support for Sinusoidal and Lambert Azimuthal Equal Area projections
  
• New operators:
  
• Second order conservative remapping - remapcon2
  
• Nearest neighbor remapping - remapnn
  
• Largest area fraction remapping - remaplaf
  
• Reciprocal value - reci
  
• Changed operators:
  
• import_cmsaf: add support for monthly mean diurnal cycle
  
• remap: set num_srch_bins to nlat/2 (speedup)
  
• Fixed bugs:
  
• setzaxis: changed datatype from float to double
  
• sellonlatbox: bug fix for curvilinear grids
  
• merge: bug fix for usage in CDO pipes
  
• gridarea, gridweights: bug fix for gridboxes with delta lon >= 180 degree
  
• intlevel: bug fix for datasets with missing values
  
• yseasstd, yseasvar: fixed wrong array index
  

CDO Version 1.2.1

• New features:
  
• Option '-u' to determinate whether to overwrite existing files
  
• New operators:
  
• Import CM-SAF files - import_cmsaf
  
• Mathematical function 'power' - pow
  
• Changed operators:
  
• sellonlatbox: add support for grid type 'CELL' and units 'radians'
  
• remapdis: add support for grid type 'CELL' without bounds (full grid search)
  
• Timstat: use time axis with bounds from input
  
• copy, cat: concatenate time constant fields
  
• Fixed bugs:
  
• zonvar: activation was missing
  
• ifthen: bug fix for datasets with different missing values
  
• runmean: bug fix for datasets with missing values
  

CDO Version 1.2.0

• New features:
  
• add support for netCDF4 classic with deflate (option -z zip)
  
• New operators:
  
• Linear level interpolation - intlevel
  
• Invert levels - invertlev
  
• Select levels by index - sellevidx
  
• Import AMSR binary files - import_amsr
  
• Changed operators:
  
• remapeta: add missing value support
  
• Fixed bugs:
  
• Operator yseasmean, yhourmean and ydaymean: bug fix for datasets with missing values
  
• Module Ninfo and Showinfo: bug fix for datasets with time constant parameter only
  Affected operators: ndate, nmon, nyear, showdate, showtime, showmon, showyear
  

CDO Version 1.1.1

• New features:
  
• Module Vertint: add support for GME data
  
• New operators:
  
• Regression - regres
  
• Grid cell area/weights - gridarea, gridweights
  
• Z-axis description - zaxisdes
  
• Fixed bugs:
  
• Module Exprf: using MT safe version of bison and flex
  
• Module Vertint: bug fix for input with time constant fields
  
• Module Arithc: recalculate number of missing values
  
• Operator splitsel: bug fix for multilevel/multivar datasets
  

CDO version 1.1.0

• New features:
  
• Added support for Lambert conformal grids in GRIB format
  
• Improved support for netCDF attributes
  
• New operators:
  
• Monthly arithmetic - monadd, monsub, monmul, mondiv
  
• Fixed bugs:
  
• Operator setlevel and chlevel: bug fix for usage in pipes
  
• Operator cat: bug fix for large existing output files (>2GB) on 32-bit machines
  
• Operator gradsdes: bug fix for monthly mean data with start day > 28
  
• Operator expr: change exponent precedence from left to right
  

CDO version 1.0.9

• New operators:
  
• Multi-year hourly statistical values
  yhourmin, yhourmax, yhoursum, yhourmean, yhouravg, yhourstd, yhourvar
• Changed operators:
  
• ymonstat: write original order of timesteps
  
• gradsdes: add GRIB level type to VARS
  
• Fixed bugs:
  
• Operator ifthen: bug fix for masks that varies not with time
  

CDO version 1.0.8

• New operators:
  
• Remap vertical hybrid level - remapeta
  
• 9 point smoothing - smooth9
  
• Mask region - maskregion
  
• Split selected time steps - splitsel
  
• Set range to constant - setrtoc, setrtoc2
  
• Histogram - histcount, histsum, histmean, histfreq
  
• Show GRIB level types - showltype
  
• Select GRIB level types - selltype
  
• Set GRIB level type - setltype
  
• Changed operators:
  
• Renamed chvar, selvar, delvar, showvar, setvar and splitvar
  to chname, selname, delname, showname, setname and splitname
  
• Renamed selmin, selmax, selsum, selmean, selavg, selvar, selstd
  to timselmin, timselmax, timselsum, timselmean, timselavg, timselvar, timselstd
  
• Renamed selpctl to timselpctl
  
• Renamed nvar to npar and vardes to pardes
  
• Fixed bugs:
  
• Module Ymonstat gave wrong results with missing values
  Affected operators: ymonmean, ymonstd, ymonvar
  
• Library ieglib has had a memory leak for IEG output
  

CDO version 1.0.7

• New operators:
  
• Divergence and vorticity to U and V wind (linear) - dv2uvl
  
• U and V wind to divergence and vorticity (linear) - uv2dvl
  
• Select single month - selsmon
  
• Changed operators:
  
• tchill is renamed to wct
  
• eca_strwind is split into eca_strwin, eca_strbre, eca_strgal and eca_hurr
  
• Fixed bugs:
  
• fldmax has had wrong results if the field has missing values and all
  other values are less than zero.

CDO version 1.0.6

• New operators:
  
• Variance for all statistic modules
  - vertvar, timvar, yearvar, monvar, dayvar, hourvar, runvar, seasvar, selvar, ydayvar, ydrunvar, ymonvar, yseasvar
  
• New environment variables:
  
• CDO_DISABLE_HISTORY:
  If set to 1, the netCDF history attribute of input datasets is not used.
  
• CDO_DISABLE_FILESUFFIX:
  If set to 1, file suffix (.grb, .nc, ...) will not be added to the output file name of split*.
  
• IGNORE_ATT_COORDINATES:
  If set to 1, netCDF variable attribute "coordinates" will be ignored.
  
• The following bugs are fixed:
  
• selyear: select years > 9999
  
• remap: initialization for GME grids
  
• rotuvb: change input coordinates to geographic
  

CDO developer version 1.0.5

• New operators:
  
• Show file format - showformat
  
• Windchill temperature - tchill
  
• Humidity index - hi
  
• ECA Indices of Daily Temperature and Precipitation Extremes
  - eca_* (37 different indices!)
  

CDO developer version 1.0.4

• New operators:
  
• Multi-year daily running statistical values
  - ydrunmin, ydrunmax, ydrunsum, ydrunmean, ydrunavg, ydrunstd
  
• Percentile values for different time ranges
  - timpctl, hourpctl, daypctl, monpctl, yearpctl, selpctl, runpctl, seaspctl
  
• Multi-year percentile values
  - ydaypctl, ymonpctl, yseaspctl, ydrunpctl
  
• Ensemble and field percentiles
  - enspctl, fldpctl, zonpctl, merpctl
  

CDO developer version 1.0.3

• New operators:
  
• Time interpolation - intntime
  
• Backward transformation of velocity components U and V from MPIOM - mrotuvb
  

CDO version 1.0.2

• Rename operator gradsdes to gradsdes1 and set the alias gradsdes to gradsdes2
  
• Remapping of rotated lonlat grids with remapbi* and genbi* has been changed at the bounds. Generated interpolation weights with older CDO versions can't be used anymore and must be recalculated with genbi*.
  
• New operators:
  
• ydaysum - Multi-year daily sum
  
• ymonsum - Multi-year monthly sum
  
• yseassum - Multi-year seasonally sum
  
• int - Convert to integer value
  
• nint - Convert to nearest integer value
  

CDO version 1.0.1

• New option '-b' to set the number of bits for the output precision
  
• New operators:
  
• selstdname - Select standard names
  
• showstdname - Show standard names
  
• setclonlatbox - Set a longitude/latitude box to constant [Etienne Tourigny]
  
• setcindexbox - Set an index box to constant
  

CDO version 1.0.0

• New operators:
  
• dv2ps - Divergence and vorticity to velocity potential and stream function
  

CDO version 0.9.13

• New operators:
  
• mergetime - Merge datasets sorted by date and time
  
• input, inputext, inputsrv - ASCII input
  
• abs - Absolute value
  
• atan2 - Arc tangent of two fields
  

CDO version 0.9.12

• New operators:
  
• uv2dv, dv2uv - Wind transformation
  

CDO version 0.9.11

• Support of GME grids
  
• New operators:
  
• selmin, selmax, selsum, selmean, selavg, selstd - Time range statistic
  
• sp2gpl, gp2spl - Spectral transformation of TL-Model data (e.g. ERA40)
  
• replace - Replace variables
  

CDO version 0.9.10

• Support of REMO IEG format
  
• New operators:
  
• ifthenelse - IF ifile1 THEN ifile2 ELSE ifile3
  

CDO version 0.9.9

• New operators:
  
• ensmin, ensmax, enssum, ensmean, ensavg, ensstd, ensvar - Ensemble statistic
  
• gradsdes2 - Creates a GrADS data descriptor file with a portable GrADS map
  
• enlarge - Enlarge all fields to a user given grid
  
• gencon - Generate conservative interpolation weights
  
• remap - Remapping with the interpolation weights from a netCDF file
  

CDO version 0.9.8

• New operators:
  
• setlevel - Set level
  
• chlevel - Change level
  
• chlevelc - Change level of one code
  
• chlevelv - Change level of one variable
  

CDO version 0.9.7

• New operators:
  
• setcalendar - Set calendar
  
• masklonlatbox - Mask lon/lat box
  
• maskindexbox - Mask index box
  
• muldpm - Multiply with days per month
  
• divdpm - Divide with days per month
  

CDO version 0.9.6

• Support of rotated regular grids.
  
• New operator: detrend
  Linear detrending of time series.

CDO version 0.9.4

• Support of PINGO grid description files.
  
• New operator: gradsdes
  Creates a GrADS data descriptor file. Supported file formats are GRIB, SERVICE and EXTRA.