Dear Andy Thanks for these proposals.
> charnock_coefficient_for_surface_roughness_length_for_momentum_in_air > sea_surface_wave_mean_square_slope are consistent with existing names and look fine to me. I don't quite understand these ones. > magnitude_of_sea_surface_wave_[xy]_mean_square_slope You are considering the slopes in the x- and y-directions separately i.e. deta/dx and deta/y, where eta is sea surface height. Maybe _[xy]_slope would be clearer, if that's right. If it's a mean square, it surely must be positive, mustn't it? If so, I don't see why it needs magnitude_of. Best wishes Jonathan ----- Forwarded message from "Saulter, Andrew" <[email protected]> ----- > Date: Fri, 14 Sep 2018 12:20:57 +0000 > From: "Saulter, Andrew" <[email protected]> > To: "[email protected]" <[email protected]> > Subject: [CF-metadata] standard names for sea surface roughness variables > > Hello everyone, hope you are all well. > > I'd like to propose some new standard names for variables relating to sea > surface roughness please. The v0 suggestions are: > > charnock_coefficient_for_surface_roughness_length_for_momentum_in_air > Units: 1 > Coefficient value, based on the Charnock (1955) empirical expression for > deriving surface_roughness_length_for_momentum_in_air over the ocean. The > surface called "surface" means the lower boundary of the atmosphere. > > [Not for description text, but see also > http://glossary.ametsoc.org/wiki/Charnock%27s_relation] > > > sea_surface_wave_mean_square_slope > Units: 1 > Wave slope describes an aspect of sea surface wave geometry related to sea > surface roughness. Mean square slope describes a derivation over multiple > waves within a sea-state, for example calculated from moments of the wave > directional spectrum. > > magnitude_of_sea_surface_wave_x_mean_square_slope > Units: 1 > Wave slope describes an aspect of sea surface wave geometry related to sea > surface roughness. Mean square slope describes a derivation over multiple > waves within a sea-state, for example calculated from moments of the wave > directional spectrum. Magnitude of "x" indicates that slope values are > derived from vector components along the grid x-axis, with slope always > taking a positive value. > > magnitude_of_sea_surface_wave_y_mean_square_slope > Units: 1 > Wave slope describes an aspect of sea surface wave geometry related to sea > surface roughness. Mean square slope describes a derivation over multiple > waves within a sea-state, for example calculated from moments of the wave > directional spectrum. Magnitude of "y" indicates that slope values are > derived from vector components along the grid y-axis, with slope always > taking a positive value. > > [My main concern with these latter variables, is the use of magnitude and > vector x/y descriptors. Hopefully the descriptive text explains this OK; > basically a negative slope makes no sense in the context in which the data > are derived and used, i.e. for surface roughness estimation] > > Will look forward to the comments :) > Cheers > Andy > > > Andy Saulter > Surge, Waves and Metocean Projects Manager > Met Office FitzRoy Road Exeter Devon EX1 3PB > Tel: +44 (0)1392 884703 Fax: +44 (0)1392 885681 > [email protected] http://www.metoffice.gov.uk > > > _______________________________________________ > CF-metadata mailing list > [email protected] > http://mailman.cgd.ucar.edu/mailman/listinfo/cf-metadata ----- End forwarded message ----- _______________________________________________ CF-metadata mailing list [email protected] http://mailman.cgd.ucar.edu/mailman/listinfo/cf-metadata
