Aligning xclim function with ETCCDI definition.

[lpcaron]

A request from CCDP PWG:

Two wet day indices on ClimateData.ca (XClim) use > rather than >= (ETCCDI) in the definition.

Would it be possible to change the default option in xclim such that the definition is consistent with ETCCDI?

[Zeitsperre]

That would be a fairly breaking change. We already have the wet days (RR1) indicator using the ICCLIM definition for wet days (https://xclim.readthedocs.io/en/stable/indicators_api.html?highlight=icclim#xclim.indicators.icclim.RR1). Why not suggest they use that by default?

[aulemahal]

In xclim, the wetdays indicator already uses >=. On thredds, I randomly checked 2 netCDF files in the cccs_portal folder, for r1mm et r20mm. Both have metadata saying that >= was used.
I might have missed something, but it might also be that the documentation on the portal is not exact?

[tlogan2000]

@aulemahal @Zeitsperre Thanks, I think this is probably a case where the website data descriptions have simply not identically followed the metadata fields. @lpcaron I will close the issue here and we can follow up with the CCDP project collaborators