* `cf.Field.regridc` now compares the units of the source and destination grids and converts between them if possible or raises an error if they are not equivalent.
----
2.3.1
-------------
**2018-11-07**
* Fixed bug in `cf.Field.regridc` that caused it to fail when regridding a multidimensional field along only one dimension. * Fixed bug which in which the default logarithm is base 10, rather than base e
2.3.0
-------------
**2018-10-22**
* The collapse method can now be parallelised by running any cf-python script with mpirun if mpi4py is installed. This is an experimental feature and is not recommended for operational use. None of the parallel code is executed when a script is run in serial.
----
2.2.8
-------------
**2018-08-28**
* Bug fix: better handle subspacing by multiple multidimensional items
----
2.2.7
-------------
**2018-07-25**
* Bug fix: correctly set units of bounds when the `cf.Data` object inserted with insert_bounds has units of ''. In this case the bounds of the parent coordinate are now inherited.
----
2.2.6
-------------
**2018-07-24**
* Improved error messages * Changed behaviour when printing reference times with a calendar of ``'none'`` - no longer attempts a to create a date-time representation