Dear Marcelo Yes - your proposal is consistent and logical - sorry I didn't notice this before. I would suggest we insert "velocity" in the existing names of sea_water_to_direction sea_water_from_direction as well as your proposal. It's not essential, but it sounds clearer and better to me. The other names with to/from_direction are wind and waves, which more obviously refer to travelling phenomena.
Best wishes Jonathan ----- Forwarded message from Marcelo Andrioni <marceloandri...@gmail.com> ----- > Date: Tue, 12 Nov 2019 16:59:38 -0300 > From: Marcelo Andrioni <marceloandri...@gmail.com> > To: cf-metadata@cgd.ucar.edu > Subject: [CF-metadata] Suggestion for standard names for bottom current and > due to tides and Stokes drift > > Dear Jonathan, my suggestion of sea_water_from_direction_at_sea_floor > was based on the "basic" standard name: > sea_water_from_direction > The phrase "from_direction" is used in the construction > X_from_direction and indicates the direction from which the velocity > vector of X is coming. The direction is a bearing in the usual > geographical sense, measured positive clockwise from due north. > > so that the only difference would be to add the suffix _at_sea_floor > like it was done with: > sea_water_potential_temperature > sea_water_potential_temperature_at_sea_floor > > Thank you. > > Em ter., 12 de nov. de 2019 às 16:22, > <cf-metadata-requ...@cgd.ucar.edu> escreveu: > > > > Send CF-metadata mailing list submissions to > > cf-metadata@cgd.ucar.edu > > > > To subscribe or unsubscribe via the World Wide Web, visit > > http://mailman.cgd.ucar.edu/mailman/listinfo/cf-metadata > > or, via email, send a message with subject or body 'help' to > > cf-metadata-requ...@cgd.ucar.edu > > > > You can reach the person managing the list at > > cf-metadata-ow...@cgd.ucar.edu > > > > When replying, please edit your Subject line so it is more specific > > than "Re: Contents of CF-metadata digest..." > > > > > > Today's Topics: > > > > 1. Suggestion for standard names for bottom current and due to > > tides and Stokes drift (Jonathan Gregory) > > 2. Re: Suggestion for standard names for bottom current and due > > to tides and Stokes drift (Marcelo Andrioni) > > > > > > ---------------------------------------------------------------------- > > > > Message: 1 > > Date: Mon, 11 Nov 2019 18:00:27 +0000 > > From: Jonathan Gregory <j.m.greg...@reading.ac.uk> > > To: "cf-metadata@cgd.ucar.edu" <cf-metadata@cgd.ucar.edu> > > Subject: [CF-metadata] Suggestion for standard names for bottom > > current and due to tides and Stokes drift > > Message-ID: <20191111180025.ga8...@met.reading.ac.uk> > > Content-Type: text/plain; charset="us-ascii" > > > > Dear Francesca and Marcelo > > > > I think that "velocity" ought to appear in this one: > > > sea_water_to_direction_at_sea_floor > > It's the velocity which has a direction. > > > > Best wishes > > > > Jonathan > > > > ----- Forwarded message from Francesca Eggleton - UKRI STFC > > <francesca.eggle...@stfc.ac.uk> ----- > > > > > Date: Mon, 11 Nov 2019 17:29:31 +0000 > > > From: Francesca Eggleton - UKRI STFC <francesca.eggle...@stfc.ac.uk> > > > To: "cf-metadata@cgd.ucar.edu" <cf-metadata@cgd.ucar.edu> > > > Subject: [CF-metadata] Suggestion for standard names for bottom current > > > and > > > due to tides and Stokes drift > > > > > > Dear Marcelo, > > > > > > > > > > > > Thank you for your proposals and apologies for the delay in responding. > > > As you may have seen in Alison's last email, I will be helping out with > > > the maintenance of the standard names. > > > > > > > > > > > > Thank you to Jonathan for comments on these proposals. They all look good > > > and seem to match what already exists. The two phrases which were > > > suggested as aliases, I believe to be new terms and have suggested a > > > reason why so please comment if you agree/disagree. The following text > > > will list each of the proposals, their units and descriptions > > > (constructed from similar terms to be in line with standard name > > > descriptions). Please let me know if there are any comments or further > > > changes to be made. If no comments are made in the next 7 days, these are > > > likely to be accepted in the next update. > > > > > > eastward_sea_water_velocity_at_sea_floor > > > ms-1 > > > A velocity is a vector quantity. "Eastward" indicates a vector component > > > which is positive when directed eastward (negative westward). The > > > velocity at the sea floor is that adjacent to the ocean bottom, which > > > would be the deepest grid cell in an ocean model. > > > > > > northward_sea_water_velocity_at_sea_floor > > > ms-1 > > > A velocity is a vector quantity. "Northward" indicates a vector component > > > which is positive when directed northward (negative southward). The > > > velocity at the sea floor is that adjacent to the ocean bottom, which > > > would be the deepest grid cell in an ocean model. > > > > > > sea_water_to_direction_at_sea_floor > > > degree > > > The phrase "to_direction" is used in the construction X_to_direction and > > > indicates the direction towards which the velocity vector of X is headed. > > > The direction is a bearing in the usual geographical sense, measured > > > positive clockwise from due north. The direction at the sea floor is that > > > adjacent to the ocean bottom, which would be the deepest grid cell in an > > > ocean model. > > > > > > sea_water_speed_at_sea_floor > > > ms-1 > > > Speed is the magnitude of velocity. The speed at the sea floor is that > > > adjacent to the ocean bottom, which would be the deepest grid cell in an > > > ocean model. > > > > > > eastward_sea_water_velocity_due_to_tides > > > ms-1 > > > A velocity is a vector quantity. "Eastward" indicates a vector component > > > which is positive when directed eastward (negative westward). The > > > specification of a physical process by the phrase "due_to_" process means > > > that the quantity named is a single term in a sum of terms which together > > > compose the general quantity named by omitting the phrase. "Due to tides" > > > means due to all astronomical gravity changes which manifest as tides. No > > > distinction is made between different tidal components. > > > northward_sea_water_velocity_due_to_tides > > > ms-1 > > > A velocity is a vector quantity. "Northward" indicates a vector component > > > which is positive when directed northward (negative southward). The > > > specification of a physical process by the phrase "due_to_" process means > > > that the quantity named is a single term in a sum of terms which together > > > compose the general quantity named by omitting the phrase. "Due to tides" > > > means due to all astronomical gravity changes which manifest as tides. No > > > distinction is made between different tidal components. > > > > > > sea_water_to_direction_due_to_tides > > > degree > > > The phrase "to_direction" is used in the construction X_to_direction and > > > indicates the direction towards which the velocity vector of X is headed. > > > The direction is a bearing in the usual geographical sense, measured > > > positive clockwise from due north. The specification of a physical > > > process by the phrase "due_to_" process means that the quantity named is > > > a single term in a sum of terms which together compose the general > > > quantity named by omitting the phrase. "Due to tides" means due to all > > > astronomical gravity changes which manifest as tides. No distinction is > > > made between different tidal components. > > > > > > sea_water_speed_due_to_tides > > > ms-1 > > > Speed is the magnitude of velocity. The specification of a physical > > > process by the phrase "due_to_" process means that the quantity named is > > > a single term in a sum of terms which together compose the general > > > quantity named by omitting the phrase. "Due to tides" means due to all > > > astronomical gravity changes which manifest as tides. No distinction is > > > made between different tidal components. > > > > > > The following should not be aliases of > > > sea_surface_wave_stokes_drift_x_velocity and > > > sea_surface_wave_stokes_drift_y_velocity, they should be proposed as new > > > terms. The definition states '"x" indicates a vector component along the > > > grid x-axis, positive with increasing x.', this has been done on purpose > > > to allow this term to be used with any type of grid and not limiting it > > > to a lat-lon grid. The term eastward is defined as '"Eastward" indicates > > > a vector component which is positive when directed eastward (negative > > > westward)' which limits this term to being 'zonal' (along a latitudinal > > > circle). > > > > > > sea_surface_wave_stokes_drift_eastward_velocity > > > ms-1 > > > A velocity is a vector quantity. "Eastward" indicates a vector component > > > which is positive when directed eastward (negative westward). The Stokes > > > drift velocity is the average velocity when following a specific fluid > > > parcel as it travels with the fluid flow. For instance, a particle > > > floating at the free surface of water waves, experiences a net Stokes > > > drift velocity in the direction of wave propagation. > > > > > > sea_surface_wave_stokes_drift_northward_velocity > > > ms-1 > > > A velocity is a vector quantity. "Northward" indicates a vector component > > > which is positive when directed northward (negative southward). The > > > Stokes drift velocity is the average velocity when following a specific > > > fluid parcel as it travels with the fluid flow. For instance, a particle > > > floating at the free surface of water waves, experiences a net Stokes > > > drift velocity in the direction of wave propagation. > > > > > > > > > sea_surface_wave_stokes_drift_to_direction > > > degrees > > > The Stokes drift velocity is the average velocity when following a > > > specific fluid parcel as it travels with the fluid flow. For instance, a > > > particle floating at the free surface of water waves, experiences a net > > > Stokes drift velocity in the direction of wave propagation. The phrase > > > "to_direction" is used in the construction X_to_direction and indicates > > > the direction towards which the velocity vector of X is headed. The > > > direction is a bearing in the usual geographical sense, measured positive > > > clockwise from due north. > > > > > > > > > sea_surface_wave_stokes_drift_speed > > > > > > ms-1 > > > > > > The Stokes drift velocity is the average velocity when following a > > > specific fluid parcel as it travels with the fluid flow. For instance, a > > > particle floating at the free surface of water waves, experiences a net > > > Stokes drift velocity in the direction of wave propagation. Speed is the > > > magnitude of velocity. > > > > > > > > > > > > Thank you, > > > > > > Francesca Eggleton > > > Graduate Environmental Data Scientist > > > Normal Working Hours (Mon-Thurs): 9am-5pm (Fri 4:30pm) > > > RAL Space | R25 | Ext: 6710 > > > > > > Centre for Environmental Data Analysis (CEDA) > > > Science and Technology Facilities Council (STFC) > > > Rutherford Appleton Laboratory | Harwell Campus > > > Didcot | OX11 0QX > > > www.ceda.ac.uk<http://www.ceda.ac.uk/> > > > > > > > > > [cid:image001.jpg@01D4F05B.30A11420][cid:image001.png@01D590AB.EC504AB0] > > > > > > P Please consider the environment before printing this e-mail > > > > > > > > > > > > Dear Marcelo > > > > > > > > > > > > These look fine to me, thanks. Just to be clear - you're *not* proposing > > > > > > at_bottom, are you? I agree with you that at_sea_floor would be the right > > > > > > phrase to use. > > > > > > > > > > > > Best wishes > > > > > > > > > > > > Jonathan > > > > > > > > > > > > > > > > > > Hello, > > > > > > > > > > > > I would like to suggest the inclusion of standard names for u, v, > > > > > > speed and direction for bottom current and due to tides and Stokes > > > > > > drift: > > > > > > > > > > > > An example of model output with bottom velocity is the HYCOM NCODA > > > forecast: > > > > > > https://tds.hycom.org/thredds/catalog/GLBv0.08/expt_93.0/data/forecasts/runs/catalog.html?dataset=GLBv0.08/expt_93.0/data/forecasts/runs/FMRC_RUN_2019-10-13T12:00:00Z > > > > > > water_u_bottom (m/s) = Eastward Water Velocity = > > > > > > eastward_sea_water_velocity_at_bottom > > > > > > water_v_bottom (m/s) = Northward Water Velocity = > > > > > > northward_sea_water_velocity_at_bottom > > > > > > > > > > > > based on existing variables: > > > > > > sea_water_potential_temperature_at_sea_floor > > > > > > sea_water_temperature_at_sea_floor > > > > > > sea_water_salinity_at_sea_floor > > > > > > sea_water_pressure_at_sea_floor > > > > > > > > > > > > my suggestion would be: > > > > > > eastward_sea_water_velocity_at_sea_floor > > > > > > northward_sea_water_velocity_at_sea_floor > > > > > > sea_water_to_direction_at_sea_floor > > > > > > sea_water_speed_at_sea_floor > > > > > > > > > > > > An example of model output with currents due to tides and Stokes drift > > > > > > is the Mercator Forecast: > > > > > > http://marine.copernicus.eu/services-portfolio/access-to-products/?option=com_csw&view=details&product_id=GLOBAL_ANALYSIS_FORECAST_PHY_001_024 > > > > > > > > > > > > based on existing variables: > > > > > > eastward_sea_water_velocity_assuming_no_tide > > > > > > northward_sea_water_velocity_assuming_no_tide > > > > > > ocean_vertical_momentum_diffusivity_due_to_tides > > > > > > ocean_vertical_tracer_diffusivity_due_to_tides > > > > > > > > > > > > my suggestion would be: > > > > > > eastward_sea_water_velocity_due_to_tides > > > > > > northward_sea_water_velocity_due_to_tides > > > > > > sea_water_to_direction_due_to_tides > > > > > > sea_water_speed_due_to_tides > > > > > > > > > > > > Stokes drift is present in the current CF table with: > > > > > > sea_surface_wave_stokes_drift_x_velocity > > > > > > sea_surface_wave_stokes_drift_y_velocity > > > > > > I think it could help to add > > > > > > sea_surface_wave_stokes_drift_eastward_velocity > > > > > > sea_surface_wave_stokes_drift_northward_velocity > > > > > > as aliases to make it clear it is zonal and meridional currents, and > > > > > > not just along the grid X and Y dimensions. > > > > > > > > > > > > Thank you very much. > > > > > > -- > > > > > > Marcelo Andrioni > > > > > > marceloandrioni at > > > gmail.com<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 > > > > > > ----- End forwarded message ----- > > > > > > ------------------------------ > > > > Message: 2 > > Date: Tue, 12 Nov 2019 16:21:43 -0300 > > From: Marcelo Andrioni <marceloandri...@gmail.com> > > To: cf-metadata@cgd.ucar.edu, francesca.eggle...@stfc.ac.uk > > Subject: Re: [CF-metadata] Suggestion for standard names for bottom > > current and due to tides and Stokes drift > > Message-ID: > > <CAECDRdfO-7adUp8XpBWXXEZse49KMtvAFY=f8noi8thqa68...@mail.gmail.com> > > Content-Type: text/plain; charset="UTF-8" > > > > Dear Francesca, > > > > the accompanying explanations of what the variables represent are > > perfect, I have nothing to contribute. I also agree with you that: > > sea_surface_wave_stokes_drift_eastward_velocity > > sea_surface_wave_stokes_drift_northward_velocity > > should *not* be aliases for > > sea_surface_wave_stokes_drift_x_velocity > > sea_surface_wave_stokes_drift_y_velocity > > > > I am glad the new names will be considered for the next update. I have > > some more suggestions for new standard names but I will be using the > > GitHub issues discussion from now on as instructed > > https://github.com/cf-convention/discuss/issues > > > > Thank you very much for your work in maintaining the list. > > > > -- > > Marcelo Andrioni > > marceloandri...@gmail.com > > > > > > From: Francesca Eggleton - UKRI STFC <francesca.eggle...@stfc.ac.uk> > > To: "cf-metadata@cgd.ucar.edu" <cf-metadata@cgd.ucar.edu> > > Subject: [CF-metadata] Suggestion for standard names for bottom > > current and due to tides and Stokes drift > > Message-ID: <b1ba4ab901f74a8fa48418a9a4c68...@stfc.ac.uk> > > Content-Type: text/plain; charset="us-ascii" > > > > Dear Marcelo, > > > > > > > > Thank you for your proposals and apologies for the delay in > > responding. As you may have seen in Alison's last email, I will be > > helping out with the maintenance of the standard names. > > > > > > > > Thank you to Jonathan for comments on these proposals. They all look > > good and seem to match what already exists. The two phrases which were > > suggested as aliases, I believe to be new terms and have suggested a > > reason why so please comment if you agree/disagree. The following text > > will list each of the proposals, their units and descriptions > > (constructed from similar terms to be in line with standard name > > descriptions). Please let me know if there are any comments or further > > changes to be made. If no comments are made in the next 7 days, these > > are likely to be accepted in the next update. > > > > eastward_sea_water_velocity_at_sea_floor > > ms-1 > > A velocity is a vector quantity. "Eastward" indicates a vector > > component which is positive when directed eastward (negative > > westward). The velocity at the sea floor is that adjacent to the ocean > > bottom, which would be the deepest grid cell in an ocean model. > > > > northward_sea_water_velocity_at_sea_floor > > ms-1 > > A velocity is a vector quantity. "Northward" indicates a vector > > component which is positive when directed northward (negative > > southward). The velocity at the sea floor is that adjacent to the > > ocean bottom, which would be the deepest grid cell in an ocean model. > > > > sea_water_to_direction_at_sea_floor > > degree > > The phrase "to_direction" is used in the construction X_to_direction > > and indicates the direction towards which the velocity vector of X is > > headed. The direction is a bearing in the usual geographical sense, > > measured positive clockwise from due north. The direction at the sea > > floor is that adjacent to the ocean bottom, which would be the deepest > > grid cell in an ocean model. > > > > sea_water_speed_at_sea_floor > > ms-1 > > Speed is the magnitude of velocity. The speed at the sea floor is that > > adjacent to the ocean bottom, which would be the deepest grid cell in > > an ocean model. > > > > eastward_sea_water_velocity_due_to_tides > > ms-1 > > A velocity is a vector quantity. "Eastward" indicates a vector > > component which is positive when directed eastward (negative > > westward). The specification of a physical process by the phrase > > "due_to_" process means that the quantity named is a single term in a > > sum of terms which together compose the general quantity named by > > omitting the phrase. "Due to tides" means due to all astronomical > > gravity changes which manifest as tides. No distinction is made > > between different tidal components. > > northward_sea_water_velocity_due_to_tides > > ms-1 > > A velocity is a vector quantity. "Northward" indicates a vector > > component which is positive when directed northward (negative > > southward). The specification of a physical process by the phrase > > "due_to_" process means that the quantity named is a single term in a > > sum of terms which together compose the general quantity named by > > omitting the phrase. "Due to tides" means due to all astronomical > > gravity changes which manifest as tides. No distinction is made > > between different tidal components. > > > > sea_water_to_direction_due_to_tides > > degree > > The phrase "to_direction" is used in the construction X_to_direction > > and indicates the direction towards which the velocity vector of X is > > headed. The direction is a bearing in the usual geographical sense, > > measured positive clockwise from due north. The specification of a > > physical process by the phrase "due_to_" process means that the > > quantity named is a single term in a sum of terms which together > > compose the general quantity named by omitting the phrase. "Due to > > tides" means due to all astronomical gravity changes which manifest as > > tides. No distinction is made between different tidal components. > > > > sea_water_speed_due_to_tides > > ms-1 > > Speed is the magnitude of velocity. The specification of a physical > > process by the phrase "due_to_" process means that the quantity named > > is a single term in a sum of terms which together compose the general > > quantity named by omitting the phrase. "Due to tides" means due to all > > astronomical gravity changes which manifest as tides. No distinction > > is made between different tidal components. > > > > The following should not be aliases of > > sea_surface_wave_stokes_drift_x_velocity and > > sea_surface_wave_stokes_drift_y_velocity, they should be proposed as > > new terms. The definition states '"x" indicates a vector component > > along the grid x-axis, positive with increasing x.', this has been > > done on purpose to allow this term to be used with any type of grid > > and not limiting it to a lat-lon grid. The term eastward is defined as > > '"Eastward" indicates a vector component which is positive when > > directed eastward (negative westward)' which limits this term to being > > 'zonal' (along a latitudinal circle). > > > > sea_surface_wave_stokes_drift_eastward_velocity > > ms-1 > > A velocity is a vector quantity. "Eastward" indicates a vector > > component which is positive when directed eastward (negative > > westward). The Stokes drift velocity is the average velocity when > > following a specific fluid parcel as it travels with the fluid flow. > > For instance, a particle floating at the free surface of water waves, > > experiences a net Stokes drift velocity in the direction of wave > > propagation. > > > > sea_surface_wave_stokes_drift_northward_velocity > > ms-1 > > A velocity is a vector quantity. "Northward" indicates a vector > > component which is positive when directed northward (negative > > southward). The Stokes drift velocity is the average velocity when > > following a specific fluid parcel as it travels with the fluid flow. > > For instance, a particle floating at the free surface of water waves, > > experiences a net Stokes drift velocity in the direction of wave > > propagation. > > > > > > sea_surface_wave_stokes_drift_to_direction > > degrees > > The Stokes drift velocity is the average velocity when following a > > specific fluid parcel as it travels with the fluid flow. For instance, > > a particle floating at the free surface of water waves, experiences a > > net Stokes drift velocity in the direction of wave propagation. The > > phrase "to_direction" is used in the construction X_to_direction and > > indicates the direction towards which the velocity vector of X is > > headed. The direction is a bearing in the usual geographical sense, > > measured positive clockwise from due north. > > > > > > sea_surface_wave_stokes_drift_speed > > > > ms-1 > > > > The Stokes drift velocity is the average velocity when following a > > specific fluid parcel as it travels with the fluid flow. For instance, > > a particle floating at the free surface of water waves, experiences a > > net Stokes drift velocity in the direction of wave propagation. Speed > > is the magnitude of velocity. > > > > > > > > Thank you, > > > > Francesca Eggleton > > Graduate Environmental Data Scientist > > Normal Working Hours (Mon-Thurs): 9am-5pm (Fri 4:30pm) > > RAL Space | R25 | Ext: 6710 > > > > Centre for Environmental Data Analysis (CEDA) > > Science and Technology Facilities Council (STFC) > > Rutherford Appleton Laboratory | Harwell Campus > > Didcot | OX11 0QX > > www.ceda.ac.uk<http://www.ceda.ac.uk/> > > > > > > ------------------------------ > > > > Subject: Digest Footer > > > > _______________________________________________ > > CF-metadata mailing list > > CF-metadata@cgd.ucar.edu > > http://mailman.cgd.ucar.edu/mailman/listinfo/cf-metadata > > > > > > ------------------------------ > > > > End of CF-metadata Digest, Vol 199, Issue 3 > > ******************************************* > > > > -- > Marcelo Andrioni > marceloandri...@gmail.com > _______________________________________________ > CF-metadata mailing list > CF-metadata@cgd.ucar.edu > http://mailman.cgd.ucar.edu/mailman/listinfo/cf-metadata ----- End forwarded message ----- _______________________________________________ CF-metadata mailing list CF-metadata@cgd.ucar.edu http://mailman.cgd.ucar.edu/mailman/listinfo/cf-metadata
