[CF-metadata] new standard names for flood simulation
- Contemporary messages sorted: [ by date ] [ by thread ] [ by subject ] [ by author ] [ by messages with attachments ]
-- Eiji (aka Eizi) TOYODA http://www.google.com/profiles/toyoda.eizi On Fri, Sep 18, 2015 at 7:43 PM, Eizi TOYODA <toyoda at npd.kishou.go.jp> wrote: > Dear Alison, > > Thanks for ticketing my proposals. Your refinements of the language are > mostly welcome, but I realized I need to clarify one point (thanks to your > assistance) in items 8 and 9. > > The hydrology people are interested in when a given region is safe to > enter. So the question is the time the flood water goes below the > threshold for the *last* time, not for the *first* time. > > So I'd like to have the first sentences of 8 and 9 like as follows. I > always welcome more natural English language. > > Best Regards, > Eizi > > > 8. time_when_flood_water_falls_below_threshold > > The quantity with standard name > time_when_flood_water_falls_below_threshold is the time elapsed between the > breaking of a levee (origin of flood water simulation) and the instant when > the depth *first* falls below a given threshold, having already risen to > its maximum depth, at a given point in space. > > 'The quantity with standard name > time_when_flood_water_falls_below_threshold is the time elapsed between the > breaking of a levee (origin of flood water simulation) and the instant when > the depth falls below a given threshold *for the last time*, having > already risen to its maximum depth, at a given point in space. > > 9. flood_water_duration_above_threshold > > 'The quantity with standard name flood_water_duration_above_threshold is > the time elapsed between the instant when the flood depth first rises above > a given threshold until the time it falls below the same threshold for a > given point in space. > > 'The quantity with standard name flood_water_duration_above_threshold is > the time elapsed between the instant when the flood depth first rises above > a given threshold until the time it falls below the same threshold *for > the last time* for a given point in space. > > > > > Best Regards, > -- > Eiji (aka Eizi) TOYODA > http://www.google.com/profiles/toyoda.eizi > > On Thu, Sep 17, 2015 at 1:26 AM, <alison.pamment at stfc.ac.uk> wrote: > >> Dear Eizi, >> >> My apologies for not joining the original discussion of these names ? I >> was on annual leave at the time. I?ve added entries for all your proposals >> to the list of names under discussion: >> http://cfeditor.ceda.ac.uk/proposals/1?status=active&namefilter=&proposerfilter=Eizi&descfilter=&unitfilter=&yearfilter=&commentfilter=&filter+and+display=Filter >> . >> >> Regarding the earlier discussion about sea_water, estuaries, rivers, >> runoff, etc., we have had previous conversations on the mailing list about >> a generic name for bodies of water on the earth?s surface, but have never >> reached agreement on a suitable term. I think flood_water is a useful way >> of describing temporary surface water ? if in future there is a need to >> further distinguish between storm surges, tsunamis, and so on, then we can >> always introduce more specific standard names. >> >> The following is a summary of the current status of your proposals. I >> have taken into account the discussion in this thread and in some cases I >> have modified the definitions a little for consistency with existing names. >> In particular, I have added wording in the definitions of the names >> requiring thresholds to make them consistent with the recent discussions we >> had on GOES-R standard names. If you are happy with these suggestions then >> I think we can go ahead and accept all the names for publication in the >> standard name table. >> >> 1. flood_water_thickness (m) >> 'The flood_water_thickness is the vertical distance between the surface >> of the flood water and the surface of the solid ground, as measured at a >> given point in space. The standard name ground_level_altitude is used for a >> data variable giving the geometric height of the ground surface above the >> geoid. "Flood water" is water that covers land which is normally not >> covered by water.' >> >> 2. flood_water_speed (m s-1) >> 'Speed is the magnitude of velocity. Flood water is water that covers >> land which is normally not covered by water.' >> >> 3. eastward_flood_water_velocity (m s-1) >> 'A velocity is a vector quantity. "Eastward" indicates a vector component >> which is positive when directed eastward (negative westward). Flood water >> is water that covers land which is normally not covered by water.' >> >> 4. northward_flood_water_velocity (m s-1) >> 'A velocity is a vector quantity. "Northward" indicates a vector >> component which is positive when directed northward (negative southward). >> Flood water is water that covers land which is normally not covered by >> water.' >> >> 5. ground_level_altitude (m) >> 'The ground_level_altitude is the geometric height of the upper boundary >> of the solid Earth above the geoid, which is the reference geopotential >> surface. The geoid is similar to mean sea level.' >> >> 6. time_when_flood_water_rises_above_threshold (s) >> 'The quantity with standard name >> time_when_flood_water_rises_above_threshold is the time elapsed between the >> breaking of a levee (origin of flood water simulation) and the instant when >> the depth first rises above a given threshold at a given point in space. If >> a threshold is supplied, it should be specified by associating a coordinate >> variable or scalar coordinate variable with the data variable and giving >> the coordinate variable a standard name of flood_water_thickness. The >> values of the coordinate variable are the threshold values for the >> corresponding subarrays of the data variable. If no threshold is specified, >> its value is taken to be zero. Flood water is water that covers land which >> is normally not covered by water.' >> >> 7. time_of_maximum_flood_depth (s) >> 'The quantity with standard name time_of_maximum_flood_depth is the time >> elapsed between the breaking of a levee (origin of flood water simulation) >> and the instant when the flood depth reaches its maximum during the >> simulation for a given point in space. Flood water is water that covers >> land which is normally not covered by water.' >> >> 8. time_when_flood_water_falls_below_threshold (s) >> 'The quantity with standard name >> time_when_flood_water_falls_below_threshold is the time elapsed between the >> breaking of a levee (origin of flood water simulation) and the instant when >> the depth first falls below a given threshold, having already risen to its >> maximum depth, at a given point in space. If a threshold is supplied, it >> should be specified by associating a coordinate variable or scalar >> coordinate variable with the data variable and giving the coordinate >> variable a standard name of flood_water_thickness. The values of the >> coordinate variable are the threshold values for the corresponding >> subarrays of the data variable. If no threshold is specified, its value is >> taken to be zero. Flood water is water that covers land which is normally >> not covered by water.' >> >> 9. flood_water_duration_above_threshold (s) >> 'The quantity with standard name flood_water_duration_above_threshold is >> the time elapsed between the instant when the flood depth first rises above >> a given threshold until the time it falls below the same threshold for a >> given point in space. If a threshold is supplied, it should be specified by >> associating a coordinate variable or scalar coordinate variable with the >> data variable and giving the coordinate variable a standard name of >> flood_water_thickness. The values of the coordinate variable are the >> threshold values for the corresponding subarrays of the data variable. If >> no threshold is specified, its value is taken to be zero. Flood water is >> water that covers land which is normally not covered by water.' >> >> Best wishes, >> Alison >> >> ------ >> Alison Pamment Tel: +44 1235 778065 >> Centre for Environmental Data Analysis Email: >> alison.pamment at stfc.ac.uk >> STFC Rutherford Appleton Laboratory >> R25, 2.22 >> Harwell Oxford, Didcot, OX11 0QX, U.K. >> >> >> From: CF-metadata [mailto:cf-metadata-bounces at cgd.ucar.edu] On Behalf Of >> Eizi TOYODA >> Sent: 16 September 2015 11:20 >> To: CF Metadata List >> Subject: Re: [CF-metadata] new standard names for flood simulation >> >> Dear CF community, >> One month has passed silently after the discussion converged. Is there >> anything to do for registration into the standard name table? >> >> Best Regards, >> Eizi >> >> P.S. for anyone interested, updated description and a sample CDL are >> available at: >> desc - https://gist.github.com/etoyoda/efb7ceeb010e71d0105c >> CDL - https://gist.github.com/etoyoda/1ad78c1df01126c3e731 >> >> >> >> >> Best Regards, >> -- >> Eiji (aka Eizi) TOYODA >> http://www.google.com/profiles/toyoda.eizi >> >> On Fri, Aug 14, 2015 at 5:37 PM, Eizi TOYODA <toyoda at gfd-dennou.org> >> wrote: >> Dear Jonathan, >> >> 1) I mean flood_water_thickness makes sense enough and I'm glad to use it. >> >> 9) Yes, I and colleagues are happy to use >> flood_water_duration_above_threshold. >> When possible, it is good to have names sound natural for people >> speaking English everyday :) >> >> Thank you so much! >> >> Best Regards, >> Eizi >> >> >> Best Regards, >> -- >> Eiji (aka Eizi) TOYODA >> http://www.google.com/profiles/toyoda.eizi >> >> On Fri, Aug 14, 2015 at 1:40 AM, Jonathan Gregory < >> j.m.gregory at reading.ac.uk> wrote: >> Dear Eizi >> >> > I'd use flood_water_thickness. >> If you're happy with that it and it makes sense to you and your >> colleagues, >> it would be the choice most consistent with other names. >> >> > Your second suggestion height_of_flood_water_surface_above_ground_level >> is >> > no problem at all, but a bit long for beginners of CF. >> I agree. >> >> > 9) time_duration_with_flood_water_above_threshold >> > I wonder perhaps "time_duration" could be "duration", looking at >> > duration_of_sunshine. >> "[time] duration with flood" etc. sounds a bit strange to me. I see that >> "flood water duration" is a phrase that occurs (in Google). Would you >> consider >> flood_water_duration_above_threshold? >> >> > Regarding 6), our planned data is only for the case of threshold=zero, >> but >> > it is no problem to generalize the concept to be symmetric with the >> > "falls_below" counterpart. >> OK. I suppose you will need a scalar coordinate variable with a >> standard_name >> of flood_water_thickness to supply the threshold, and this should have a >> default - perhaps zero would be a suitable default. >> >> I think your use of flags and strings to describe hazard conditions is >> good, >> and I appreciate that at this point you don't need to standardise them. >> >> Best wishes >> >> Jonathan >> _______________________________________________ >> CF-metadata mailing list >> CF-metadata at cgd.ucar.edu >> http://mailman.cgd.ucar.edu/mailman/listinfo/cf-metadata >> >> >> _______________________________________________ >> CF-metadata mailing list >> CF-metadata at cgd.ucar.edu >> http://mailman.cgd.ucar.edu/mailman/listinfo/cf-metadata >> > > -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://mailman.cgd.ucar.edu/pipermail/cf-metadata/attachments/20160512/6606acc0/attachment-0001.html>Received on Thu May 12 2016 - 06:48:01 BST
This archive was generated by hypermail 2.3.0 : Tue Sep 13 2022 - 23:02:42 BST