Dear Sebastien, I have been discussing these names again off-list with the proposer Kevin Marsh over the last few days. I think we are making good progress and I am doing some more work on the definitions of the names. I will post a summary of progress on all these names within the next day or so. Thanks for looking at the names again.
Best wishes, Alison ------ 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. > -----Original Message----- > From: CF-metadata [mailto:[email protected]] On Behalf Of > Sebastien Villaume > Sent: 30 March 2017 09:08 > To: [email protected] > Subject: Re: [CF-metadata] New standard names for NEMO ocean model output > > > Hi all, > > I would like to reactivate this specific thread in order to reach an agreement > and get these standard names accepted and published in the next version of > the table. > > I went through the whole thread and updated each proposed standard name > according to the comments/suggestions made (please see below). > > I have also added two new standard names: one to deprecate an existing > standard name that is not following the usual naming convention > (integral_of_sea_water_potential_temperature_wrt_depth_in_ocean_layer_exp > ressed_as_heat_content) and one derived from it to cover the whole sea water > column case. It is the last two of the list below. > > Since I am not an ocean model expert and in particular not a NEMO expert/user, > I am welcoming any relevant comments/suggestions, especially from the NEMO > community. > > thanks > > ==================== > NEMO variable: > somixhgt > standard name: > ocean_mixed_layer_thickness_defined_by_vertical_tracer_diffusivity_threshold > (originally proposed as ocean_turbocline_depth) > units: > m > > description: > The mixed layer thickness is estimated using the depth at which the vertical > eddy diffusivity coefficient (resulting from the vertical physics alone) fall > below > a given value defined locally. A coordinate variable or scalar coordinate > variable with standard name ocean_vertical_diffusivity can be specified to > indicate the value of the coefficient that was used to calculate the mixed > layer > thickness. > > other action to take (suggested by Jonathan Gregory): > rename the existing the standard > name ocean_mixed_layer_thickness_defined_by_vertical_tracer_diffusivity > which refers to the level at which the diffusivity differs from its surface > value by > a certain amount, as > ocean_mixed_layer_thickness_defined_by_vertical_tracer_diffusivity_deficit > > > ==================== > NEMO variable: > sobpheig > standard name: > sea_water_mass_per_unit_area_expressed_as_thickness > (originally proposed as bottom_pressure_equivalent_height) > units: > m > > description: > This is the mass of the water column expressed as a thickness using a given > reference density: > > sea_water_mass_per_unit_area_expressed_as_thickness = ( > sea_water_mass_per_unit_area / sea_water_density ) > > The thickness is the extent of a vertical column or layer. The sea water > density > used to do the conversion is assumed to be the density of water of standard > temperature T=0°C and practical salinity S=35.0. Otherwise it should be > provided as an auxiliary scalar using the standard name sea_water_density. > > > ==================== > NEMO variable: > sostheig > standard name: > ocean_steric_thickness > (originally proposed as ocean_steric_height) > units: > m > > description: > The ocean steric thickness measures the height by which a column of water > with standard temperature T=0°C and salinity S=35.0 expands if its temperature > and salinity are changed to the observed values. > > > ==================== > NEMO variable: > vosthsal > standard name: > ocean_halosteric_thickness > (originally proposed as ocean_steric_thickness_due_to_salinity) > units: > m > > description: > The quantity with standard name ocean_halosteric_thickness is a measure of > the change in thickness that would be undergone by a column of water of > standard temperature T=0°C and practical salinity S=35.0 if its salinity were > changed to the locally observed value. Thickness is the extent of a vertical > column or layer. > > ==================== > NEMO variable: > vosthtem > standard name: > ocean_thermosteric_thickness > (originally proposed as ocean_steric_thickness_due_to_temperature) > units: > m > > description: > The quantity with standard name ocean_thermosteric_thickness is a measure > of the change in thickness that would be undergone by a column of water of > standard temperature T=0°C and practical salinity S=35.0 if its temperature > were changed to the locally observed value. Thickness is the extent of a > vertical > column or layer. > > ==================== > NEMO variable: > vottrdmp > standard name: > ratio_of_sea_water_potential_temperature_anomaly_to_relaxation_timescale > (originally proposed as temperature_profile_anomaly_correction) > units: > K s-1 > > description: > This term is estimated as the deviation of the local sea water potential > temperature from an ocean model with respect to an observation-based > climatology (eg World Ocean Database) weighted by a user-specified > relaxation coefficient in s-1 (1/(relaxation timescale)). > > ==================== > NEMO variable: > vostrdmp > standard name: > ratio_of_sea_water_practical_salinity_anomaly_to_relaxation_timescale > (originally proposed as practical_salinity_profile_anomaly_correction) > units: > s-1 > > description: > This term is estimated as the deviation of the local sea water practical > salinity > from an ocean model with respect to an observation-based climatology (eg > World Ocean Database) weighted by a user-specified relaxation coefficient in > s-1 (1/(relaxation timescale)). > > ==================== > NEMO variables: > sosal300, sosal700 > standard name: > integral_of_sea_water_practical_salinity_wrt_depth_in_ocean_layer > (originally proposed as integral_of_sea_water_practical_salinity_wrt_depth) > units: > 1 > > description: > This quantity is calculated as the integral, of the sea water salinity with > respect > to depth, over the specified layer of the ocean from the surface to the level > indicated by the vertical coordinate or scalar coordinate variable. > "integral_of_Y_wrt_X" means int Y dX. The data variable should have an axis > for > X specifying the limits of the integral as bounds. "wrt" means "with respect > to". > "Layer" means any layer with upper and lower boundaries that have constant > values in some vertical coordinate. There must be a vertical coordinate > variable > indicating the extent of the layer(s). If the layers are model layers, the > vertical > coordinate can be model_level_number, but it is recommended to specify a > physical coordinate (in a scalar or auxiliary coordinate variable) as well. > Depth > is the vertical distance below the surface. > > ==================== > NEMO variable: > sosalbtm > standard name: > ocean_integral_of_sea_water_practical_salinity_wrt_depth > (originally proposed as > integral_of_sea_water_practical_salinity_wrt_total_depth) > units: > 1 > > description: > This quantity is calculated as the integral, of the sea water salinity, over > of the > ocean from the sea surface to the sea bed. "integral_of_Y_wrt_X" means int Y > dX. The data variable should have an axis for X specifying the limits of the > integral as bounds. "wrt" means "with respect to". "Layer" means any layer > with > upper and lower boundaries that have constant values in some vertical > coordinate. There must be a vertical coordinate variable indicating the > extent of > the layer(s). If the layers are model layers, the vertical coordinate can be > model_level_number, but it is recommended to specify a physical coordinate (in > a scalar or auxiliary coordinate variable) as well. Depth is the vertical > distance > below the surface. > > ==================== > NEMO variables: > sohtc300, sohtc700 > standard name: > integral_of_sea_water_potential_temperature_wrt_depth_in_ocean_layer_expr > essed_as_heat_content > (already in the CF standard name table but should be deprecated because it > does not follow usual naming convention, i.e. missing “in_ocean_layer”) > units: > J m-2 > > description: > This quantity is calculated as the integral, of the potential temperature with > respect to depth, expressed as heat content, over the specified layer of the > ocean from the surface to the level indicated by the vertical coordinate or > scalar coordinate variable. "integral_of_Y_wrt_X" means int Y dX. The data > variable should have an axis for X specifying the limits of the integral as > bounds. "wrt" means "with respect to". "Layer" means any layer with upper and > lower boundaries that have constant values in some vertical coordinate. There > must be a vertical coordinate variable indicating the extent of the layer(s). > If > the layers are model layers, the vertical coordinate can be > model_level_number, but it is recommended to specify a physical coordinate (in > a scalar or auxiliary coordinate variable) as well. Depth is the vertical > distance > below the surface. > > other action to take: > deprecate > integral_of_sea_water_potential_temperature_wrt_depth_expressed_as_heat_ > content and set an alias to the new standard name. > > ===================== > NEMO variable: > sohtcbtm > standard name: > ocean_integral_of_sea_water_potential_temperature_wrt_depth_expressed_as > _heat_content > units: > J m-2 > > description: > This quantity is calculated as the integral, of the potential temperature with > respect to depth, expressed as heat content, over of the ocean from the sea > surface to the sea bed. "integral_of_Y_wrt_X" means int Y dX. The data > variable > should have an axis for X specifying the limits of the integral as bounds. > "wrt" > means "with respect to". "Layer" means any layer with upper and lower > boundaries that have constant values in some vertical coordinate. There must > be a vertical coordinate variable indicating the extent of the layer(s). If > the > layers are model layers, the vertical coordinate can be model_level_number, > but it is recommended to specify a physical coordinate (in a scalar or > auxiliary > coordinate variable) as well. Depth is the vertical distance below the > surface. > > ===================== > ____________________________________ > > Dr. Sébastien Villaume > Analyst > ECMWF Shinfield Park, > Reading RG2 9AX, UK > +44 7825 521592 > [email protected] > ____________________________________ > _______________________________________________ > CF-metadata mailing list > [email protected] > http://mailman.cgd.ucar.edu/mailman/listinfo/cf-metadata _______________________________________________ CF-metadata mailing list [email protected] http://mailman.cgd.ucar.edu/mailman/listinfo/cf-metadata
