Dear Heinke > > If a standard_name has the phrase "dependent_on_X" (or whatever phrase is > > used) it would mean that it must have a coordinate variable, scalar > > coordinate > > variable or auxiliary coordinate variable with standard_name of X, to > > specify > > the condition. > > > > This gives me a new idea: > > /* number of days with daily minimum below 0 degC = frost_days = fd > (IPCC AR4 and AR5) */ > float n1(lat,lon); > n1:standard_name="number_of_days_with_variable_below_threshold"; > n1:coordinates="threshold time"; > n1:cell_methods="time: sum over days"; > float threshold; > threshold:standard_name="air_temperature"; > threshold:units="degC"; > threshold:cell_methods="time:minimun within days" > data: > threshold=0.; > > The threshold with the term "below_threshold" describes the indicator > condition. > The term "number_of_days_with" describes the sum over the indicator value. > What do you think ? Could we use the scalar coordinate this way ?
Yes, I think this would be OK, except that I would prefer (as in my last email) that we indicate the "variable" explicitly i.e. > n1:standard_name="number_of_days_with_air_temperature_below_threshold"; I realise that air_temperature is also a coordinate variable, but I feel that it we should include it in the standard name as well. For a probability distribution or a pdf, we would name it in the standard name e.g. probability_density_function_of_air_temperature. It would be essential to include it for a pdf, in fact, because the units depend on it (K-1). Best wishes Jonathan _______________________________________________ CF-metadata mailing list [email protected] http://mailman.cgd.ucar.edu/mailman/listinfo/cf-metadata
