[CF-metadata] Recording "day of year on which something happens"

Jim Biard jbiard at cicsnc.org
Tue Mar 14 09:12:23 MDT 2017


Jon,

1) I'd use 'days'. It is a valid standard name apart from the 'days 
since date' formalism. It's not perfect, but it's legal. You could, 
alternatively, request a new standard name.

2) Use a time_bounds variable. I would tend to set the time to be July 1 
at midnight for each year, and set the bounds for each year to Jan 1 of 
that year and Jan 1 of the next year.

Grace and peace,

Jim

On 3/14/17 10:43 AM, Jon Blower wrote:
> Hi all,
>
> We need to structure a NetCDF file that will hold a variable that represents the day of the year on which an event happened (integers from 0 to 366). This value is recorded every year for a number of years. I have a couple of questions about how best to do this:
>
> 1. What is the best standard name to use for the day of the year? I didn’t find anything in the standard name table, although I might have missed it.
>
> 2. What would be the best way to define the time axis? Each point along the axis would represent a whole year, rather than an instant in time. I could simply pick an arbitrary instant (e.g. midnight on 1st Jan) to represent the year, but is there a better way?
>
> Thanks in advance for any help!
>
> Jon
>
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