[CF-metadata] standard names to be added on 3rd Oct

Jonathan Gregory j.m.gregory at reading.ac.uk
Mon Sep 26 01:50:25 MDT 2005


Dear Michael and Pepe

>  * volume_attenuation_coefficient_of_radiation_in_sea_water:m-1
> it could also be expressed as:
>  * volume_beam_attenuation_coefficient_of_radiation_in_sea_water:m-1 
> which would differentiate it from:
>  * volume_diffusive_attenuation_coefficient_of_radiation_in_sea_water:m-1
> In a nutshell, the difference is in the angles considered.  Beam attenuation
> considers the attenuation of (semi-)coherent light in a forward direction,
> while diffusive attenuation considers the attenuation from a diffuse source,
> which allows for a lot more forward scattering to be included in the
> measurement.

I propose we should stick with the plain attenuation, since it appears to be in
common use (for atmosphere as well) and find some other way to draw this
distinction. (But if necessary we can change our mind later and use aliases.)
The explanation helps. How do you measure a diffuse attenuation?

I think we have agreed that
>  * volume_backwards_scattering_coefficient_of_radiation_in_sea_water:m-1
is to be defined as an integral over backward angles, so it won't have a
coordinate specifying the angle.

The following is the list of names proposed to be added next Monday 3rd unless
there are any further comments:

aerosol_angstrom_exponent:1
atmosphere_optical_thickness_due_to_aerosol:1
bioluminescent_photon_rate_in_sea_water:s-1 m-3
concentration_of_suspended_matter_in_sea_water:kg m-3
fractional_saturation_of_oxygen_in_sea_water:1
height_above_sea_floor:m
moles_of_nitrate_and_nitrite_per_unit_mass_in_sea_water:mol kg-1
moles_of_nitrate_per_unit_mass_in_sea_water:mol kg-1
moles_of_nitrite_per_unit_mass_in_sea_water:mol kg-1
moles_of_oxygen_per_unit_mass_in_sea_water:mol kg-1
moles_of_phosphate_per_unit_mass_in_sea_water:mol kg-1
moles_of_silicate_per_unit_mass_in_sea_water:mol kg-1
omnidirectional_photosynthetic_spherical_irradiance_in_sea_water:W m-2 
omnidirectional_spectral_spherical_irradiance_in_sea_water:W m-3
optical_thickness_of_atmosphere_layer_due_to_aerosol:1
r:Pa
scattering_angle:rad
speed_of_sound_in_sea_water:m s-1
surface_carbon_dioxide_partial_pressure_difference_between_air_and_sea_wate
surface_partial_pressure_of_carbon_dioxide_in_air:Pa
surface_partial_pressure_of_carbon_dioxide_in_sea_water:Pa
surface_upwelling_radiance_in_sea_water:W m-2 sr-1
surface_upwelling_spectral_radiance_in_sea_water:W m-2 m-1 sr-1
volume_absorption_coefficient_of_radiation_in_sea_water:m-1
volume_absorption_coefficient_of_radiation_in_sea_water_due_to_dissolved_organic_matter:m-1
volume_attenuation_coefficient_of_radiation_in_sea_water:m-1
volume_backwards_scattering_coefficient_of_radiation_in_sea_water:m-1
volume_mixing_ratio_of_oxygen_at_stp_in_sea_water:1 
volume_scattering_coefficient_of_radiation_in_sea_water:m-1
volume_scattering_function_of_radiation_in_sea_water:m-1 sr-1

We have not yet finished the discussion about the platform_ standard names
(in a separate email thread - see
http://www.cgd.ucar.edu/pipermail/cf-metadata/2005/000739.html).

Thanks for your help

Cheers

Jonathan



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