Dear Jonathan, Many thanks for the quick reply. The following standard name is now accepted for publication and will be added to the table at the next update:
grounded_ice_sheet_area (Canonical units: m2) ' "X_area" means the horizontal area occupied by X within the grid cell. The extent of an individual grid cell is defined by the horizontal coordinates and any associated coordinate bounds or by a string valued auxiliary coordinate variable with a standard name of "region". "Grounded ice sheet" indicates where the ice sheet rests over bedrock and is thus grounded. It excludes ice-caps, glaciers and floating ice shelves.' I will also update the existing X_area names to add the sentence about grid cell extent to their definitions. This affects the following four names: burned_area; fire_area; sea_area; sea_ice_area. Best wishes, Alison > -----Original Message----- > From: CF-metadata [mailto:[email protected]] On Behalf Of > Jonathan Gregory > Sent: 09 February 2017 14:28 > To: [email protected] > Subject: Re: [CF-metadata] additional standard name for ISMIP6 > > Dear Alison > > > Jonathan replied: > > > Are you sure we can't call it area? It seems to me it's fine to call it > > > that > > > if the coordinates indicate it refers to the whole world (regarded as one > > > grid cell) or to some large region (containing an entire ice sheet). > > > > I certainly agree that it seems more natural to call it > grounded_ice_sheet_area. The definitions of the four existing "X_area" names > say '"X_area" means the horizontal area occupied by X within the grid cell'. > When I made my previous comments I was thinking about summing areas > across multiple grid cells each of which contains a part of the ice sheet, but > actually if the 'grid cell' in this case covers the entire area of the ice > then it's > not a problem. Perhaps the definition should be modified to emphasize that a > bit more. Maybe something like: > > ' "X_area" means the horizontal area occupied by X within the grid cell. The > extent of an individual grid cell is defined by the horizontal coordinates > and any > associated coordinate bounds or by a string valued auxiliary coordinate > variable > with a standard name of "region".' Does that sound OK? > > Yes, I think that would be fine for this and other area-integral quantities > like it. It seems fine to allow "grid cell" to mean any region which can be > defined by horizontal coord bounds. > > > You're right, it should be floating_ice_shelf_area_fraction to be consistent > with the new area type of floating_ice_shelf that we have just introduced for > ISMIP6. I think the terminology changed part way through the conversation and > I > neglected to update the standard name. I will create an alias > (floating_ice_sheet_area_fraction -> floating_ice_shelf_area_fraction) and > modify the definition accordingly. This will be included in the next update of > standard names, planned for 21st February. > > Thanks very much > > Jonathan > _______________________________________________ > CF-metadata mailing list > [email protected] > http://mailman.cgd.ucar.edu/mailman/listinfo/cf-metadata ------ Alison Pamment Tel: +44 1235 778065 Centre for Environmental Data Analysis Email: [email protected] STFC Rutherford Appleton Laboratory R25, 2.22 Harwell Campus, Didcot, OX11 0QX, U.K. _______________________________________________ CF-metadata mailing list [email protected] http://mailman.cgd.ucar.edu/mailman/listinfo/cf-metadata
