Here is a CDL illustration of how I think this could work, with separate
variables for the (1) months and years (with each year 12 months, months
variable numbers of days), (2) days, hours, minutes (60 minutes to the hour, 24
hours to the day, variable length minutes) and (3) seconds (SI units .. only
counting seconds since last minute). I've not included a true time axis, as
trying to convert the times to UTC times in a single parameter would be error
prone and defeat the point of the example.
```netcdf ex1 {
dimensions:
time = 2 ;
variables:
float mydata(time) ;
mydata:coordinates = "time time_ca time_cl seconds" ;
int time_ca(time) ;
time_ca:long_name = "Calendar months [years*12 + months]" ;
time_ca:units = "month_ca since 1980-01-01 00:00:00" ;
time_ca:calendar = "gregorian_utc" ;
time_ca:standard_name = "time_ca" ;
int time_cl(time) ;
time_cl:long_name = "Seconds elapsed since last full UTC
minute" ;
time_cl:units = "hour_cl since 1980-01-01 00:00:00" ;
time_cl:calendar = "gregorian_utc" ;
time_cl:standard_name = "time_cl" ;
float seconds(time) ;
seconds:standard_name = "time" ;
seconds:units = "s";
// global attributes:
:Conventions = "CF-1.7" ;
:title = "Sample of proposed new abstract time variables" ;
:comments = "encodes \'1980-06-01 12:02:15\' and \'1981-06-01
12:04:35\' in UTC time" ;
data:
mydata = 0, 1 ;
time_ca = 6, 18 ;
time_cl = 722, 724 ;
seconds = 15, 35 ;
}```
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