Harmonise some canonical units

[larsbarring]

I just saw that for some of the standard names the canonical units use division / notation rather than "inversion -1 notation". Is there a specific reason for this? Else it might be useful to change to the latter.

Here is a table of the ones I have found:

Standard Name	Canonical Units
downwelling_longwave_flux_in_air_assuming_clear_sky_and_reference_mole_fraction_of_ozone_in_air	W/m2
downwelling_longwave_flux_in_air_assuming_reference_mole_fraction_of_ozone_in_air	W/m2
downwelling_shortwave_flux_in_air_assuming_clear_sky_and_reference_mole_fraction_of_ozone_in_air	W/m2
downwelling_shortwave_flux_in_air_assuming_reference_mole_fraction_of_ozone_in_air	W/m2
reference_mole_fraction_of_ozone_in_air	mol/mol
surface_downwelling_longwave_flux_in_air_assuming_clear_sky_and_reference_mole_fraction_of_ozone_in_air	W/m2
surface_downwelling_longwave_flux_in_air_assuming_reference_mole_fraction_of_ozone_in_air	W/m2
surface_downwelling_shortwave_flux_in_air_assuming_clear_sky_and_reference_mole_fraction_of_ozone_in_air	W/m2
surface_downwelling_shortwave_flux_in_air_assuming_reference_mole_fraction_of_ozone_in_air	W/m2
surface_upwelling_longwave_flux_in_air_assuming_clear_sky_and_reference_mole_fraction_of_ozone_in_air	W/m2
surface_upwelling_longwave_flux_in_air_assuming_reference_mole_fraction_of_ozone_in_air	W/m2
surface_upwelling_shortwave_flux_in_air_assuming_clear_sky_and_reference_mole_fraction_of_ozone_in_air	W/m2
surface_upwelling_shortwave_flux_in_air_assuming_reference_mole_fraction_of_ozone_in_air	W/m2
toa_outgoing_longwave_flux_assuming_clear_sky_and_reference_mole_fraction_of_ozone_in_air	W/m2
toa_outgoing_longwave_flux_assuming_reference_mole_fraction_of_ozone_in_air	W/m2
toa_outgoing_shortwave_flux_assuming_clear_sky_and_reference_mole_fraction_of_ozone_in_air	W/m2
toa_outgoing_shortwave_flux_assuming_reference_mole_fraction_of_ozone_in_air	W/m2
upwelling_longwave_flux_in_air_assuming_clear_sky_and_reference_mole_fraction_of_ozone_in_air	W/m2
upwelling_longwave_flux_in_air_assuming_reference_mole_fraction_of_ozone_in_air	W/m2
upwelling_shortwave_flux_in_air_assuming_clear_sky_and_reference_mole_fraction_of_ozone_in_air	W/m2
upwelling_shortwave_flux_in_air_assuming_reference_mole_fraction_of_ozone_in_air	W/m2

Moreover, I also found two more that use the full unit string radian rather rad, which is used elsewhere in the table. Same here, if there is not specific reason for this, I suggest changing these too.

Standard Name	Canonical Units
projection_x_angular_coordinate	radian
projection_y_angular_coordinate	radian

Kind regards,
Lars

[github-actions]

Thank you for your proposal. These terms will be added to the cfeditor (http://cfeditor.ceda.ac.uk/proposals/1) shortly. Your proposal will then be reviewed and commented on by the community and Standard Names moderator.

[efisher008]

Thank you for pointing this out Lars. This appears to have been an error, and all 21 names have been changed to express their units with inverse -1 notation.

projection_x_angular_coordinate and projection_y_angular_coordinate have had their units changed from radian to rad, which is now compliant with the P06 terms.

I have marked these as accepted as the only change necessary was to the unit notation. These changes should be published in the next release of the Standard Name table (v88), which is expected in December 2024/January 2025.

[japamment]

Most of the changes agreed here have been implemented in v88 of the standard name table.

I accidentally missed a few:
downwelling_longwave_flux_in_air_assuming_reference_mole_fraction_of_ozone_in_air W/m2 -> W m-2
reference_mole_fraction_of_ozone_in_air mol/mol -> mol mol-1
projection_x_angular_coordinate radian -> rad
projection_y_angular_coordinate radian -> rad

Apologies, this was due to human error on my part - I have queued them up again in the CF editor and these last few will be included in the next standard names update on January 20th/21st.

Best wishes,
Alison

[japamment]

All the changes proposed in this issue have been published in versions 88 and 89 of the standard name table so closing this one now.