Release Notes¶

What’s new in iris-grib v0.15¶

Updated translations between GRIB parameter code and CF standard_name or long_name :
- additional WAFC codes, both to and from CF
- ‘mass_fraction_of_cloud_liquid_water_in_air’ and ‘mass_fraction_of_cloud_ice_in_air’, both to and from CF
- ‘surface_downwelling_longwave_flux_in_air’, now translates to GRIBcode(2, 0, 5, 3) (but not the reverse).
- for full details, see : https://github.com/Scitools/iris-grib/compare/c4243ae..5c314e3#diff-cf46b46880cae59e82a91c7ab6bb81ba
Added support for loading GRIB messages with no fixed surface set in the product definition section
Added support for loading GRIB messages where i or j increment are not set
Added support for saving cubes that have a “depth” coordinate
Cubes loaded from GRIB files now contain a new GRIB_PARAM attribute, the value of which is an instance of iris_grib.grib_phenom_translation.GRIBCode and represents the parameter code. When saving, if a cube has a GRIBCode attribute, this determines the parameter code in the created message(s): This will _override_ any translation from the CF names.

Reverted a bug that was fixed in v0.13 related to loading hybrid pressure levels. It was agreed that the initial behaviour was correct

Added support for WAFC aviation codes.
Added loading and saving of statistically processed values over a spatial area at a horizontal level or in a horizontal layer at a point in time (product definition template 15 in code table 4.0)

Added fixes to get iris-grib working with the Python 3 compatible release of eccodes. This included workarounds such that lists that are returned by eccodes are converted to NumPy arrays as expected.

Added saving of data on Hybrid Pressure levels (surface type 119 in code table 4.5).
Added loading and saving of data on Hybrid Height levels (surface type 118 in code table 4.5).
Added loading and saving of data using Mercator projection (grid definition template 10 in template table 3.1)

Note

Loading and saving for the Mercator projection is only available using iris versions greater than 2.1.0.
Added saving for data on irregular, non-rotated grids (grid definition template 4 in template table 3.1)
Added release notes for versions since 0.9.

Fixed a bug with loading data on Hybrid Pressure levels (surface types 105 and 119 in code table 4.5). Previously, all hybrid coordinate values, in both ‘level_pressure’ and ‘sigma’ coordinates, were loaded from the next level up, i.e. (model_level_number + 1).

Note

This changes loading behaviour for data on hybrid pressure levels only. This is an incompatible change, but the coefficent values previously returned were essentially useless, with some values missing.

Updated to work with ecCodes as its interface to GRIB files. This is ECMWF’s replacement for the older GRIB-API, which is now deprecated.

Update for Iris v2.0+, using dask in place of biggus for deferred loading.

Stable release of iris-grib to support iris v1.10