We have a dataset that represents accumulations from a single, common start
time to successively later times. As such, the time values are unique, numeric,
and monotonic (as required for a coordinate variable), but the time bounds all
overlap:
variables:
float stratiform_rainfall_amount(dim0, grid_latitude,
grid_longitude) ;
stratiform_rainfall_amount:standard_name =
"stratiform_rainfall_amount" ;
...
int time(time) ;
time:bounds = "time_bnds" ;
...
int time_bnds(time, bnds) ;
data:
time = 1, 2, 3, 4, 5, 6 ;
time_bnds =
0, 2,
0, 4,
0, 6,
0, 8,
0, 10,
0, 12 ;
Is it recommended to encode these overlapping accumulations as a coordinate
variable?
In the most relevant prior discussion I have found
(http://mailman.cgd.ucar.edu/pipermail/cf-metadata/2010/053823.html) the
decision seems to hinge on whether the data have any "particular order" or
whether it would "make sense to do an operation which depended on their being
in order". In our case there definitely is an order and it does make sense to
operate on them in that order.
Richard Hattersley
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