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
