SciTools/iris — pull request #300 by pelson (2013-01-10 15:50:14+00:00)
Title: Supported merging of accumulations.

Further to my question on the iris-dev group, this fixes the merge behaviour for accumulations (such as perecipitation_amount).

See https://groups.google.com/forum/?fromgroups=#!topic/scitools-iris-dev/FjnNjdG6b58 for more details.