Hello Lars,
1. Here you have two options for providing exactly equivalent information, and the choice is yours. I don't think there is any general reason to prefer one over the other. If you use the "amount", I believe you should have cell_methods "time: sum" and a time bounds variable. With "rate", on the other hand, you need cell_methods "time: mean", and time bounds variable. You need the time bounds variable in both cases: setting the units to "mm day-1" just specifies the unit of measure and doesn't tell the user that it is a representing the daily rainfall. 2. I'd advise sticking to ASCII for the title. I recently wrote a "guide" setting out some rules used for variables in CMIP6: https://zenodo.org/record/2480853 .. I'd be interested in your comments on that. In CMIP6, as in CMIP5, we have tended not to include "daily" in the long names -- mainly because it is easier to use a fixed long name across multiple frequencies. regards, Martin ________________________________ From: CF-metadata <cf-metadata-boun...@cgd.ucar.edu> on behalf of Bärring Lars <lars.barr...@smhi.se> Sent: 24 January 2019 14:13 To: cf-metadata@cgd.ucar.edu Subject: [CF-metadata] Two [simple] questions Dear all, Two simple questions of understanding: 1. If I have (observed) daily precipitation with unit mm/day and want to store this in a CF compliant file, should I use standard name --- "lwe_thickness_of_precipitation_amount" with canonical unit metre and the "per day" part is inferred from the time bounds, or --- "lwe_precipitation_rate" having canonical unit "m s-1", --- if both are acceptable, is one to be preferred? 2. The long_name is free, but should be descriptive. I am thinking of this as a succinct plot title, so the question is what practical limitation there might be in relation to different software. Is it advisable to use ASCII spaces (from Github issue #141 indicates that only standard ASCII character set should be used) ? Many thanks, Lars -- Lars Bärring FDr, Forskare PhD, Research Scientist SMHI / Swedish Meteorological and Hydrological Institute Rossby Centre SE - 601 76 NORRKÖPING http://www.smhi.se<http://www.smhi.se/> E-post / Email: lars.barr...@smhi.se<mailto:lars.barr...@smhi.se> Tel / Phone: +46 (0)11 495 8604 Fax: +46 (0)11 495 8001 Besöksadress / Visiting address: Folkborgsvägen 17 _______________________________________________ CF-metadata mailing list CF-metadata@cgd.ucar.edu http://mailman.cgd.ucar.edu/mailman/listinfo/cf-metadata
