Hi Karl,
Thanks, that looks better. I was trying to stick close to existing patterns, but the outcome was a bit contrived and, I agree, not very satisfactory. Sorry about the confusion, the two terms we need are: fraction_of_rain_mass_falling_on_snow fraction_of_snow_mass_falling_on_snow However, I need to check with LS3MIP whether they intend "snowfall" to include snow and ice, as for the CMIP5 variable "prsn", regards, Martin ________________________________ From: CF-metadata <[email protected]> on behalf of Karl Taylor <[email protected]> Sent: 31 May 2018 19:11 To: [email protected] Subject: Re: [CF-metadata] Precipitation fractions for LS3MIP Hi Martin, For CMIP6, I think we define precipitation = rainfall + snowfall . So do you want to collect "precipitation amount" or "rainfall amount" (in addition to "snowfall amount")? You first mention "rainfall" below, but later propose a name for "precipitation". I also think it is a bit confusing that in this name "amount" refers to the amount accumulated over some time-period (e.g., a day or a month), rather than the total "content" that exists at a given point in time. I might suggest as alternatives: fraction_of_precipitation_mass_falling_on_snow fraction_of_rain_mass_falling_on_snow fraction_of_snow_mass_falling_on_snow best regards, Karl On 5/31/18 9:56 AM, Martin Juckes - UKRI STFC wrote: > Hello All, > > > There are two LS3MIP variables for fractions of precipitation onto snow: > fraction of rainfall on snow and fraction of snowfall on snow. In both cases > the fraction is calculated as the mass of precipitation falling on snow > divided by the total mass of precipitation in the grid cell. > > > Since we are dealing with mass, the term should start from > precipitation_amount and snowfall_amount. > > > We have terms like lwe_thickness_of_precipitation_amount to describe > properties of the precipitation amount, and we have > precipitation_flux_onto_canopy do describe a flux onto a particular surface, > so I propose: > > fraction_of_precipitation_amount_onto_snow and > > fraction_of_snowfall_amount_onto_snow, both with units '1', > > > regards, > > Martin > > > > > _______________________________________________ > CF-metadata mailing list > [email protected] > http://mailman.cgd.ucar.edu/mailman/listinfo/cf-metadata _______________________________________________ CF-metadata mailing list [email protected] http://mailman.cgd.ucar.edu/mailman/listinfo/cf-metadata _______________________________________________ CF-metadata mailing list [email protected] http://mailman.cgd.ucar.edu/mailman/listinfo/cf-metadata
