[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 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/20150918/b12b7d0a/attachment-0001.html>Received on Fri Sep 18 2015 - 04:43:04 BST
This archive was generated by hypermail 2.3.0 : Tue Sep 13 2022 - 23:02:42 BST