Nan --- Just to better understand your setup: the data you are referring to comes from a totalizer rain gauge, where the data may look like
day i, 321 mm day j, 321 mm day k, 333 mm day l, 333 mm day k, 399 mm and this is what you record , and store? /Lars ________________________________________ Från: CF-metadata [[email protected]] för Nan Galbraith [[email protected]] Skickat: den 24 januari 2019 19:42 Till: [email protected] Ämne: Re: [CF-metadata] Two [simple] questions I sincerely hope you're wrong about these standard names, Jonathan! We include precip in our met files, and use the lwe_thickness_of_precipitation_amount standard name to report the actual level of water in a rain gauge. It is NOT a rate of precip, which is calculated (roughly, for rain gauges) by a first difference. If the values in this variable were interpreted as a rate, it would be completely incorrect; values that are unchanging convert to a rate of 0, no matter how high they may be. Maybe I've been mis-using this standard name? Thanks - Nan On 1/24/19 9:34 AM, Jonathan Gregory wrote: > Dear Lars > >> 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? > You can use whichever you prefer. They would also be distinguished by > cell_methods. The first is extensive in time, so it has cell_methods of sum, > the second is intensive and has cell_methods of mean. > >> 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) ? > I expect others have something useful to say about that. > > Best wishes > > Jonathan > _______________________________________________ > CF-metadata mailing list > [email protected] > http://mailman.cgd.ucar.edu/mailman/listinfo/cf-metadata > -- ******************************************************* * Nan Galbraith Information Systems Specialist * * Upper Ocean Processes Group Mail Stop 29 * * Woods Hole Oceanographic Institution * * Woods Hole, MA 02543 (508) 289-2444 * ******************************************************* _______________________________________________ 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
