Dear Dirk,
a fair comment ... I withdraw my suggested re-ordering, regards, Martin ________________________________ From: CF-metadata <cf-metadata-boun...@cgd.ucar.edu> on behalf of Dirk Notz <dirk.n...@mpimet.mpg.de> Sent: 03 July 2018 14:34 To: cf-metadata@cgd.ucar.edu Subject: Re: [CF-metadata] SIMIP: 5 standard names and one area type for CMIP6 Dear Alison, Jonathan, Martin, I like the names that Jonathan suggested. With Martin's definition, I find it more difficult to figure out how to read the various parts of the name, i.e. people could wonder about a "sea-ice maximum" etc. Best, Dirk ---- Dr. Dirk Notz http://www.mpimet.mpg.de/~notz.dirk Am 03.07.2018 um 13:26 schrieb Martin Juckes - UKRI STFC: > Dear Alison, Jonathan, > > > I can see some benefit in the re-ordering the parts of the name, but we > generally start names with something more specific to the parameter (e.g. > sea_surface_wave_maximum_period). > > > How about: > > sea_ice_maximum_over_coordinate_rotation_of_horizontal_shear_strain_rate > (s-1) and > > sea_ice_maximum_over_coordinate_rotation_of_horizontal_shear_stress (N m-1)? > > > regards, > > Martin > > ________________________________ > From: CF-metadata <cf-metadata-boun...@cgd.ucar.edu> on behalf of Jonathan > Gregory <j.m.greg...@reading.ac.uk> > Sent: 28 June 2018 14:49 > To: Pamment, Alison (STFC,RAL,RALSP) > Cc: cf-metadata@cgd.ucar.edu > Subject: Re: [CF-metadata] SIMIP: 5 standard names and one area type for CMIP6 > > Dear Alison > > Yes, that's what I meant. Thanks for considering it. > > Best wishes > > Jonathan > > On Thu, Jun 28, 2018 at 01:41:23PM +0000, Alison Pamment - UKRI STFC wrote: >> Date: Thu, 28 Jun 2018 13:41:23 +0000 >> From: Alison Pamment - UKRI STFC <alison.pamm...@stfc.ac.uk> >> To: "'j.m.greg...@reading.ac.uk'" <j.m.greg...@reading.ac.uk>, >> "cf-metadata@cgd.ucar.edu" <cf-metadata@cgd.ucar.edu> >> Subject: RE: [CF-metadata] SIMIP: 5 standard names and one area type for >> CMIP6 >> >> Dear Jonathan, >> >> Thank you for commenting on these names. If I understand you correctly, then >> the two 'maximum' names and definitions would be rearranged as follows. >> >> maximum_over_coordinate_rotation_of_sea_ice_horizontal_shear_strain_rate >> (s-1) >> '"Sea ice" means all ice floating in the sea which has formed from freezing >> sea water, rather than by other processes such as calving of land ice to >> form icebergs. Axial strain is the symmetric component of the tensor >> representing the gradient of internal forces (e.g. in ice). Strain rate >> refers to off-diagonal element(s) of the strain tensor (a single element for >> horizontal shear strain). "Horizontal" refers to the local horizontal in the >> location of the sea ice, i.e., perpendicular to the local gravity vector. >> Each of the strain components is defined with respect to a frame of >> reference. "Coordinate rotation" refers to the range of all possible >> orientations of the frame of reference. The shear strain has a maximum value >> relative to one of these orientations. The second invariant of strain rate, >> often referred to as the maximum shear strain [rate], is the maximum over >> coordinate rotations of the shear strain rate.' >> >> maximum_over_coordinate_rotation_of_sea_ice_horizontal_shear_stress (N m-1) >> ' "Sea ice" means all ice floating in the sea which has formed from freezing >> sea water, rather than by other processes such as calving of land ice to >> form icebergs. Axial stress is the symmetric component of the tensor >> representing the gradient of internal forces (e.g. in ice). Shear stress >> refers to off-diagonal element(s) of the stress tensor (a single element for >> horizontal shear stress). "Horizontal" refers to the local horizontal in the >> location of the sea ice, i.e., perpendicular to the local gravity vector. >> Each of the stress components is defined with respect to a frame of >> reference. "Coordinate rotation" refers to the range of all possible >> orientations of the frame of reference. The shear stress has a maximum value >> relative to one of these orientations. The second invariant of stress, often >> referred to as the maximum shear stress, is the maximum over coordinate >> rotations of the shear stress.' >> >> I tend to agree that these are a little easier to understand at first sight. >> I'm happy to write the names and definitions this way, if Dirk and Bruno >> have no objections. >> >> N.B. I have added 'Axial' to the start of the second sentence of the >> definitions and replaced 'stress' with 'strain' for the first definition, as >> requested by Dirk. >> >> Best wishes, >> Alison >> >> ------ >> Alison Pamment Tel: +44 1235 778065 >> NCAS/Centre for Environmental Data Archival Email: >> alison.pamm...@stfc.ac.uk >> STFC Rutherford Appleton Laboratory >> R25, 2.22 >> Harwell Oxford, Didcot, OX11 0QX, U.K. >> >> -----Original Message----- >> From: CF-metadata <cf-metadata-boun...@cgd.ucar.edu> On Behalf Of Jonathan >> Gregory >> Sent: 25 June 2018 14:23 >> To: cf-metadata@cgd.ucar.edu >> Subject: Re: [CF-metadata] SIMIP: 5 standard names and one area type for >> CMIP6 >> >> Dear Alison and Dirk >> >>> It has taken me a little while to understand this name, but I am beginning >>> to grasp it! >>> sea_ice_horizontal_shear_strain_rate_maximum_over_coordinate_rotation >>> (s-1) >> >> I think the concept and definition are fine, but the name could maybe be >> made a bit clearer. The last sentence of the definition seems clearer in >> turning it >> round: could you likewise make the name >> maximum_over_coordinate_rotation_of_sea_ice_horizontal_shear_strain_rate >> >> ? >> >> Cheers >> >> Jonathan >> _______________________________________________ >> CF-metadata mailing list >> CF-metadata@cgd.ucar.edu >> http://mailman.cgd.ucar.edu/mailman/listinfo/cf-metadata >> > _______________________________________________ > CF-metadata mailing list > CF-metadata@cgd.ucar.edu > http://mailman.cgd.ucar.edu/mailman/listinfo/cf-metadata > _______________________________________________ > CF-metadata mailing list > CF-metadata@cgd.ucar.edu > http://mailman.cgd.ucar.edu/mailman/listinfo/cf-metadata > _______________________________________________ CF-metadata mailing list CF-metadata@cgd.ucar.edu http://mailman.cgd.ucar.edu/mailman/listinfo/cf-metadata _______________________________________________ CF-metadata mailing list CF-metadata@cgd.ucar.edu http://mailman.cgd.ucar.edu/mailman/listinfo/cf-metadata
